Improved CO oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO 2 catalysts. Siani, A., Captain, B., Alexeev, S, O., Stafyla, E., Hungria, B, A., Midgley, A, P., Thomas, M, J., Adams, D, R., Amiridis, & D, M. Langmuir, 22(11):5160--5167, Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States, 2006. Paper abstract bibtex The catalytic performance of cluster-derived PtFe/SiO 2 bimetallic catalysts for the oxidation of CO has been examined in the absence and presence of H2 (PROX) and compared to that of Pt/SiO 2- PtFe 2/SiO 2 and Pt;Fe 2/SiO 2 samples were prepared from PtFe 2(COD)(CO) 8 and Pt 5Fe 2(COD) 2(CO) 12 organometallic cluster precursors, respectively. FTIR data indicate that both clusters can be deposited intact on the SiO 2 support. The clusters remained weakly bonded to the SiO 2 surface and could be extracted with CH 2Cl 2 without any significant changes in their structure. Subsequent heating in H 2 led to complete decarbonylation of the supported clusters at approximately 350°C and the formation of Pt-Fe nanoparticles with sizes in the 1-2 nm range, as indicated by HRTEM imaging. A few larger nanoparticles enriched in Pt were also observed, indicating that a small fraction of the deposited clusters were segregated to the individual components following the hydrogen treatment. A higher degree of metal dispersion and more homogeneous mixing of the two metals were observed during HRTEM/XEDS analysis with the cluster-derived samples, as compared to a PtFe/SiO 2 catalyst prepared through a conventional impregnation route. Furthermore, the cluster-derived PtFe 2/SiO 2 and Pt 5Fe 2/SiO 2 samples were more active than Pt/SiO 2 and the conventionally prepared PtFe/SiO 2 sample for the oxidation of CO in air. However, substantial deactivation was also observed, indicating that the properties of the Pt-Fe bimetallic sites in the cluster-derived samples were altered by exposure to the reactants. The Pt 5Fe 2/SiO 2 sample was also more active than Pt/SiO 2 for PROX with a selectivity of approximately 92% at 50°C. In this case, the deactivation with time on stream was substantially slower, indicating that the highly reducing environment under the PROX conditions helps maintain the properties of the active Pt-Fe bimetallic sites. © 2006 American Chemical Society.
@article{ Siani2006a,
abstract = {The catalytic performance of cluster-derived PtFe/SiO 2 bimetallic catalysts for the oxidation of CO has been examined in the absence and presence of H2 (PROX) and compared to that of Pt/SiO 2- PtFe 2/SiO 2 and Pt;Fe 2/SiO 2 samples were prepared from PtFe 2(COD)(CO) 8 and Pt 5Fe 2(COD) 2(CO) 12 organometallic cluster precursors, respectively. FTIR data indicate that both clusters can be deposited intact on the SiO 2 support. The clusters remained weakly bonded to the SiO 2 surface and could be extracted with CH 2Cl 2 without any significant changes in their structure. Subsequent heating in H 2 led to complete decarbonylation of the supported clusters at approximately 350°C and the formation of Pt-Fe nanoparticles with sizes in the 1-2 nm range, as indicated by HRTEM imaging. A few larger nanoparticles enriched in Pt were also observed, indicating that a small fraction of the deposited clusters were segregated to the individual components following the hydrogen treatment. A higher degree of metal dispersion and more homogeneous mixing of the two metals were observed during HRTEM/XEDS analysis with the cluster-derived samples, as compared to a PtFe/SiO 2 catalyst prepared through a conventional impregnation route. Furthermore, the cluster-derived PtFe 2/SiO 2 and Pt 5Fe 2/SiO 2 samples were more active than Pt/SiO 2 and the conventionally prepared PtFe/SiO 2 sample for the oxidation of CO in air. However, substantial deactivation was also observed, indicating that the properties of the Pt-Fe bimetallic sites in the cluster-derived samples were altered by exposure to the reactants. The Pt 5Fe 2/SiO 2 sample was also more active than Pt/SiO 2 for PROX with a selectivity of approximately 92% at 50°C. In this case, the deactivation with time on stream was substantially slower, indicating that the highly reducing environment under the PROX conditions helps maintain the properties of the active Pt-Fe bimetallic sites. © 2006 American Chemical Society.},
address = {Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States},
annote = {Cited By (since 1996): 39
Export Date: 15 January 2013
Source: Scopus
CODEN: LANGD
doi: 10.1021/la053476a
Language of Original Document: English
Correspondence Address: Amiridis, M.D.; Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States
References: Santra, A.K., Goodman, D.W., (2002) Electrochim. Acta, 47, p. 3595;
Song, C., (2002) Catal. Today, 77, p. 17;
Fierro, J.L.G., Pena, M.A., (2005) Catal. Sci. Ser., 5, p. 229;
Adams, W.A., Blair, J., Bullock, K.R., Gardner, C.L., (2005) J. Power Sources, 145, p. 55;
Farrauto, R.J., Flytzani-Stephanopulos, M., (2005) Fuel Processing and PEM Fuel Cells: Advanced Catalysts, Adsorbents and Electrocatalysts, , Elsevier: Amsterdam;
Choudhary, T.V., Goodman, D.W., (2002) Catal. Today, 77, p. 65;
Levec, J., (2005) Opportunities in Catalytic Reaction Engineering. Examples of Heterogeneous Catalysis in Water Remediation and Preferential CO Oxidation, p. 103. , Galan, M. A., Martin del Valle, E., Eds.; Wiley: Chichester, U.K;
Manasilp, A., Gulari, E., (2004) Appl. Catal. B, 37, p. 17;
Oh, S.H., Sinkevitch, R.M., (1993) J. Catal., 142, p. 254;
Ito, S., Fujimori, T., Nagashima, K., Yuzaki, K., Kunimori, K., (2000) Catal. Today, 57, p. 247;
Suh, D.J., Kwak, C., Kim, J.-H., Kwon, S.M., Park, T.-J., (2005) J. Power Sources, 142, p. 70;
Alexeev, O.S., Gates, B.C., (2003) Ind. Eng. Chem. Res., 42, p. 1571;
Snytnikov, P.V., Sobyanin, V.A., Belyaev, V.D., Shlyapin, D.A., (2003) Khimiya Interesakh Ustoichivogo Razvinya, 11, p. 297;
Schubert, M.M., Kahlich, M.J., Feldmeyer, G., Huttner, M., Hackenberg, S., Gasteiger, H.A., Behm, R.J., (2001) Phys. Chem. Chem. Phys., 3, p. 1123;
Korotkikh, O., Farrauto, R., (2000) Catal. Today, 62, p. 249;
Kotobuki, M., Watanabe, A., Uchida, H., Yamashita, H., Watanabe, M., (2005) J. Catal., 256, p. 262;
Son, I.H., Lane, A.M., (2001) Catal. Lett., 76, p. 151;
Liu, X., Korotkikh, O., Farrauto, R., (2002) Appl. Catal. A: General, 226, p. 293;
McDermott, J.X., White, J.F., Whitesides, G.M., (1976) J. Am. Chem. Soc., 98, p. 6521;
Adams, R.D., Arafa, I., Chen, G., Lii, J.C., Wang, J.G., (1990) Organometallics, 9, p. 2350;
Farrugia, L.J., Howard, J.A.K., Mitrachachon, P., Stone, F.G.A., Woodward, P., (1981) J. Chem. Soc., Dalton Trans., p. 1134;
Alexeev, O., Gates, B.C., (2000) Top. Catal., 10, p. 273;
Guczi, L., Beck, A., (1988) Polyhedron, 7, p. 2387;
Braterman, P.S., (1975) Metal Carbonyl Spectra, , Academic Press: London;
Gracía, F.J., Bollmann, L., Wolf, E.E., Miller, J.T., Kropf, A.J., (2003) J. Catal., 220, p. 382;
Alexeev, O.S., Chin, S.Y., Engelhard, M.H., Ortiz-Soto, L., Amiridis, M.D., (2005) J. Phys Chem. B, 109, p. 23430;
Sinfelt, J.H., (1983) Bimetallic Catalysts: Discoveries, Concepts, and Applications, , Wiley: New York;
Ponec, V., Bond, G.C., (1995) Catalysis by Metals and Alloys, , Elsevier: Amsterdam;
Lobree, L.J., Hwang, I., Reimer, J.A., Bell, A.T., (1999) J. Catal., 186, p. 242;
Sirijaruphan, A., Goodwin, J.G., Rice, R.W., (2004) J. Catal., 224, p. 304;
Liu, H., Kozlov, A.I., Kozlova, A.P., Shido, T., Iwasawa, Y., (1999) Phys. Chem. Chem. Phys., 1, p. 2851;
Ouyang, X., Bednarova, L., Besser, R.S., Ho, P., (2005) AIChE J., 51, p. 1758;
Chin, S.Y., Alexeev, O.S., Amiridis, M.D., (2005) Appl. Catal. A: General, 286, p. 157;
Sirijaruphan, A., Goodwin, J.G., Rice, R.W., (2004) J. Catal., 221, p. 288},
author = {Siani, A and Captain, B and Alexeev, O S and Stafyla, E and Hungria, A B and Midgley, P A and Thomas, J M and Adams, R D and Amiridis, M D},
issn = {07437463 (ISSN) },
journal = {Langmuir},
keywords = {Bimetals,Carbon inorganic compounds,Carbon monoxide,Conventional impregnation route,Decarbonylation,Fourier transform infrared spectroscopy,Hydrogen,Metal dispersion,Organometallic cluster precursors,Organometallics,Oxidation,Platinum compounds,Segregation (metallography),Silica},
number = {11},
pages = {5160--5167},
title = {{Improved CO oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO 2 catalysts}},
url = {https://www.scopus.com/inward/record.url?eid=2-s2.0-33745759894\&partnerID=40\&md5=377ca96b1d1603c70f0442ded70322dd},
volume = {22},
year = {2006}
}
Downloads: 0
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FTIR data indicate that both clusters can be deposited intact on the SiO 2 support. The clusters remained weakly bonded to the SiO 2 surface and could be extracted with CH 2Cl 2 without any significant changes in their structure. Subsequent heating in H 2 led to complete decarbonylation of the supported clusters at approximately 350°C and the formation of Pt-Fe nanoparticles with sizes in the 1-2 nm range, as indicated by HRTEM imaging. A few larger nanoparticles enriched in Pt were also observed, indicating that a small fraction of the deposited clusters were segregated to the individual components following the hydrogen treatment. A higher degree of metal dispersion and more homogeneous mixing of the two metals were observed during HRTEM/XEDS analysis with the cluster-derived samples, as compared to a PtFe/SiO 2 catalyst prepared through a conventional impregnation route. Furthermore, the cluster-derived PtFe 2/SiO 2 and Pt 5Fe 2/SiO 2 samples were more active than Pt/SiO 2 and the conventionally prepared PtFe/SiO 2 sample for the oxidation of CO in air. However, substantial deactivation was also observed, indicating that the properties of the Pt-Fe bimetallic sites in the cluster-derived samples were altered by exposure to the reactants. The Pt 5Fe 2/SiO 2 sample was also more active than Pt/SiO 2 for PROX with a selectivity of approximately 92% at 50°C. In this case, the deactivation with time on stream was substantially slower, indicating that the highly reducing environment under the PROX conditions helps maintain the properties of the active Pt-Fe bimetallic sites. © 2006 American Chemical Society.},\n address = {Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States},\n annote = {Cited By (since 1996): 39\n\nExport Date: 15 January 2013\n\nSource: Scopus\n\nCODEN: LANGD\n\ndoi: 10.1021/la053476a\n\nLanguage of Original Document: English\n\nCorrespondence Address: Amiridis, M.D.; Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States\n\nReferences: Santra, A.K., Goodman, D.W., (2002) Electrochim. Acta, 47, p. 3595; \nSong, C., (2002) Catal. Today, 77, p. 17; \nFierro, J.L.G., Pena, M.A., (2005) Catal. Sci. Ser., 5, p. 229; \nAdams, W.A., Blair, J., Bullock, K.R., Gardner, C.L., (2005) J. Power Sources, 145, p. 55; \nFarrauto, R.J., Flytzani-Stephanopulos, M., (2005) Fuel Processing and PEM Fuel Cells: Advanced Catalysts, Adsorbents and Electrocatalysts, , Elsevier: Amsterdam; \nChoudhary, T.V., Goodman, D.W., (2002) Catal. Today, 77, p. 65; \nLevec, J., (2005) Opportunities in Catalytic Reaction Engineering. Examples of Heterogeneous Catalysis in Water Remediation and Preferential CO Oxidation, p. 103. , Galan, M. A., Martin del Valle, E., Eds.; Wiley: Chichester, U.K; \nManasilp, A., Gulari, E., (2004) Appl. Catal. B, 37, p. 17; \nOh, S.H., Sinkevitch, R.M., (1993) J. Catal., 142, p. 254; \nIto, S., Fujimori, T., Nagashima, K., Yuzaki, K., Kunimori, K., (2000) Catal. Today, 57, p. 247; \nSuh, D.J., Kwak, C., Kim, J.-H., Kwon, S.M., Park, T.-J., (2005) J. Power Sources, 142, p. 70; \nAlexeev, O.S., Gates, B.C., (2003) Ind. Eng. Chem. Res., 42, p. 1571; \nSnytnikov, P.V., Sobyanin, V.A., Belyaev, V.D., Shlyapin, D.A., (2003) Khimiya Interesakh Ustoichivogo Razvinya, 11, p. 297; \nSchubert, M.M., Kahlich, M.J., Feldmeyer, G., Huttner, M., Hackenberg, S., Gasteiger, H.A., Behm, R.J., (2001) Phys. Chem. Chem. Phys., 3, p. 1123; \nKorotkikh, O., Farrauto, R., (2000) Catal. Today, 62, p. 249; \nKotobuki, M., Watanabe, A., Uchida, H., Yamashita, H., Watanabe, M., (2005) J. Catal., 256, p. 262; \nSon, I.H., Lane, A.M., (2001) Catal. Lett., 76, p. 151; \nLiu, X., Korotkikh, O., Farrauto, R., (2002) Appl. Catal. A: General, 226, p. 293; \nMcDermott, J.X., White, J.F., Whitesides, G.M., (1976) J. Am. Chem. Soc., 98, p. 6521; \nAdams, R.D., Arafa, I., Chen, G., Lii, J.C., Wang, J.G., (1990) Organometallics, 9, p. 2350; \nFarrugia, L.J., Howard, J.A.K., Mitrachachon, P., Stone, F.G.A., Woodward, P., (1981) J. Chem. Soc., Dalton Trans., p. 1134; \nAlexeev, O., Gates, B.C., (2000) Top. Catal., 10, p. 273; \nGuczi, L., Beck, A., (1988) Polyhedron, 7, p. 2387; \nBraterman, P.S., (1975) Metal Carbonyl Spectra, , Academic Press: London; \nGracía, F.J., Bollmann, L., Wolf, E.E., Miller, J.T., Kropf, A.J., (2003) J. Catal., 220, p. 382; \nAlexeev, O.S., Chin, S.Y., Engelhard, M.H., Ortiz-Soto, L., Amiridis, M.D., (2005) J. Phys Chem. B, 109, p. 23430; \nSinfelt, J.H., (1983) Bimetallic Catalysts: Discoveries, Concepts, and Applications, , Wiley: New York; \nPonec, V., Bond, G.C., (1995) Catalysis by Metals and Alloys, , Elsevier: Amsterdam; \nLobree, L.J., Hwang, I., Reimer, J.A., Bell, A.T., (1999) J. Catal., 186, p. 242; \nSirijaruphan, A., Goodwin, J.G., Rice, R.W., (2004) J. Catal., 224, p. 304; \nLiu, H., Kozlov, A.I., Kozlova, A.P., Shido, T., Iwasawa, Y., (1999) Phys. Chem. Chem. Phys., 1, p. 2851; \nOuyang, X., Bednarova, L., Besser, R.S., Ho, P., (2005) AIChE J., 51, p. 1758; \nChin, S.Y., Alexeev, O.S., Amiridis, M.D., (2005) Appl. Catal. A: General, 286, p. 157; \nSirijaruphan, A., Goodwin, J.G., Rice, R.W., (2004) J. Catal., 221, p. 288},\n author = {Siani, A and Captain, B and Alexeev, O S and Stafyla, E and Hungria, A B and Midgley, P A and Thomas, J M and Adams, R D and Amiridis, M D},\n issn = {07437463 (ISSN) },\n journal = {Langmuir},\n keywords = {Bimetals,Carbon inorganic compounds,Carbon monoxide,Conventional impregnation route,Decarbonylation,Fourier transform infrared spectroscopy,Hydrogen,Metal dispersion,Organometallic cluster precursors,Organometallics,Oxidation,Platinum compounds,Segregation (metallography),Silica},\n number = {11},\n pages = {5160--5167},\n title = {{Improved CO oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO 2 catalysts}},\n url = {https://www.scopus.com/inward/record.url?eid=2-s2.0-33745759894\\&partnerID=40\\&md5=377ca96b1d1603c70f0442ded70322dd},\n volume = {22},\n year = {2006}\n}</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" id=\"abstract_Siani2006a\"\n style=\"display:none\">\n The catalytic performance of cluster-derived PtFe/SiO 2 bimetallic catalysts for the oxidation of CO has been examined in the absence and presence of H2 (PROX) and compared to that of Pt/SiO 2- PtFe 2/SiO 2 and Pt;Fe 2/SiO 2 samples were prepared from PtFe 2(COD)(CO) 8 and Pt 5Fe 2(COD) 2(CO) 12 organometallic cluster precursors, respectively. FTIR data indicate that both clusters can be deposited intact on the SiO 2 support. The clusters remained weakly bonded to the SiO 2 surface and could be extracted with CH 2Cl 2 without any significant changes in their structure. Subsequent heating in H 2 led to complete decarbonylation of the supported clusters at approximately 350°C and the formation of Pt-Fe nanoparticles with sizes in the 1-2 nm range, as indicated by HRTEM imaging. A few larger nanoparticles enriched in Pt were also observed, indicating that a small fraction of the deposited clusters were segregated to the individual components following the hydrogen treatment. A higher degree of metal dispersion and more homogeneous mixing of the two metals were observed during HRTEM/XEDS analysis with the cluster-derived samples, as compared to a PtFe/SiO 2 catalyst prepared through a conventional impregnation route. Furthermore, the cluster-derived PtFe 2/SiO 2 and Pt 5Fe 2/SiO 2 samples were more active than Pt/SiO 2 and the conventionally prepared PtFe/SiO 2 sample for the oxidation of CO in air. However, substantial deactivation was also observed, indicating that the properties of the Pt-Fe bimetallic sites in the cluster-derived samples were altered by exposure to the reactants. The Pt 5Fe 2/SiO 2 sample was also more active than Pt/SiO 2 for PROX with a selectivity of approximately 92% at 50°C. In this case, the deactivation with time on stream was substantially slower, indicating that the highly reducing environment under the PROX conditions helps maintain the properties of the active Pt-Fe bimetallic sites. © 2006 American Chemical Society.\n</div>\n\n\n</div>\n","downloads":0,"keyword":["Bimetals","Carbon inorganic compounds","Carbon monoxide","Conventional impregnation route","Decarbonylation","Fourier transform infrared spectroscopy","Hydrogen","Metal dispersion","Organometallic cluster precursors","Organometallics","Oxidation","Platinum compounds","Segregation (metallography)","Silica"],"abstract":"The catalytic performance of cluster-derived PtFe/SiO 2 bimetallic catalysts for the oxidation of CO has been examined in the absence and presence of H2 (PROX) and compared to that of Pt/SiO 2- PtFe 2/SiO 2 and Pt;Fe 2/SiO 2 samples were prepared from PtFe 2(COD)(CO) 8 and Pt 5Fe 2(COD) 2(CO) 12 organometallic cluster precursors, respectively. FTIR data indicate that both clusters can be deposited intact on the SiO 2 support. The clusters remained weakly bonded to the SiO 2 surface and could be extracted with CH 2Cl 2 without any significant changes in their structure. Subsequent heating in H 2 led to complete decarbonylation of the supported clusters at approximately 350°C and the formation of Pt-Fe nanoparticles with sizes in the 1-2 nm range, as indicated by HRTEM imaging. A few larger nanoparticles enriched in Pt were also observed, indicating that a small fraction of the deposited clusters were segregated to the individual components following the hydrogen treatment. A higher degree of metal dispersion and more homogeneous mixing of the two metals were observed during HRTEM/XEDS analysis with the cluster-derived samples, as compared to a PtFe/SiO 2 catalyst prepared through a conventional impregnation route. Furthermore, the cluster-derived PtFe 2/SiO 2 and Pt 5Fe 2/SiO 2 samples were more active than Pt/SiO 2 and the conventionally prepared PtFe/SiO 2 sample for the oxidation of CO in air. However, substantial deactivation was also observed, indicating that the properties of the Pt-Fe bimetallic sites in the cluster-derived samples were altered by exposure to the reactants. The Pt 5Fe 2/SiO 2 sample was also more active than Pt/SiO 2 for PROX with a selectivity of approximately 92% at 50°C. In this case, the deactivation with time on stream was substantially slower, indicating that the highly reducing environment under the PROX conditions helps maintain the properties of the active Pt-Fe bimetallic sites. © 2006 American Chemical Society.","address":"Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States","annote":"Cited By (since 1996): 39 Export Date: 15 January 2013 Source: Scopus CODEN: LANGD doi: 10.1021/la053476a Language of Original Document: English Correspondence Address: Amiridis, M.D.; Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States References: Santra, A.K., Goodman, D.W., (2002) Electrochim. Acta, 47, p. 3595; Song, C., (2002) Catal. Today, 77, p. 17; Fierro, J.L.G., Pena, M.A., (2005) Catal. Sci. Ser., 5, p. 229; Adams, W.A., Blair, J., Bullock, K.R., Gardner, C.L., (2005) J. Power Sources, 145, p. 55; Farrauto, R.J., Flytzani-Stephanopulos, M., (2005) Fuel Processing and PEM Fuel Cells: Advanced Catalysts, Adsorbents and Electrocatalysts, , Elsevier: Amsterdam; Choudhary, T.V., Goodman, D.W., (2002) Catal. Today, 77, p. 65; Levec, J., (2005) Opportunities in Catalytic Reaction Engineering. Examples of Heterogeneous Catalysis in Water Remediation and Preferential CO Oxidation, p. 103. , Galan, M. A., Martin del Valle, E., Eds.; Wiley: Chichester, U.K; Manasilp, A., Gulari, E., (2004) Appl. Catal. B, 37, p. 17; Oh, S.H., Sinkevitch, R.M., (1993) J. Catal., 142, p. 254; Ito, S., Fujimori, T., Nagashima, K., Yuzaki, K., Kunimori, K., (2000) Catal. Today, 57, p. 247; Suh, D.J., Kwak, C., Kim, J.-H., Kwon, S.M., Park, T.-J., (2005) J. Power Sources, 142, p. 70; Alexeev, O.S., Gates, B.C., (2003) Ind. Eng. Chem. Res., 42, p. 1571; Snytnikov, P.V., Sobyanin, V.A., Belyaev, V.D., Shlyapin, D.A., (2003) Khimiya Interesakh Ustoichivogo Razvinya, 11, p. 297; Schubert, M.M., Kahlich, M.J., Feldmeyer, G., Huttner, M., Hackenberg, S., Gasteiger, H.A., Behm, R.J., (2001) Phys. Chem. Chem. Phys., 3, p. 1123; Korotkikh, O., Farrauto, R., (2000) Catal. Today, 62, p. 249; Kotobuki, M., Watanabe, A., Uchida, H., Yamashita, H., Watanabe, M., (2005) J. Catal., 256, p. 262; Son, I.H., Lane, A.M., (2001) Catal. Lett., 76, p. 151; Liu, X., Korotkikh, O., Farrauto, R., (2002) Appl. Catal. A: General, 226, p. 293; McDermott, J.X., White, J.F., Whitesides, G.M., (1976) J. Am. Chem. Soc., 98, p. 6521; Adams, R.D., Arafa, I., Chen, G., Lii, J.C., Wang, J.G., (1990) Organometallics, 9, p. 2350; Farrugia, L.J., Howard, J.A.K., Mitrachachon, P., Stone, F.G.A., Woodward, P., (1981) J. Chem. Soc., Dalton Trans., p. 1134; Alexeev, O., Gates, B.C., (2000) Top. Catal., 10, p. 273; Guczi, L., Beck, A., (1988) Polyhedron, 7, p. 2387; Braterman, P.S., (1975) Metal Carbonyl Spectra, , Academic Press: London; Gracía, F.J., Bollmann, L., Wolf, E.E., Miller, J.T., Kropf, A.J., (2003) J. Catal., 220, p. 382; Alexeev, O.S., Chin, S.Y., Engelhard, M.H., Ortiz-Soto, L., Amiridis, M.D., (2005) J. Phys Chem. B, 109, p. 23430; Sinfelt, J.H., (1983) Bimetallic Catalysts: Discoveries, Concepts, and Applications, , Wiley: New York; Ponec, V., Bond, G.C., (1995) Catalysis by Metals and Alloys, , Elsevier: Amsterdam; Lobree, L.J., Hwang, I., Reimer, J.A., Bell, A.T., (1999) J. Catal., 186, p. 242; Sirijaruphan, A., Goodwin, J.G., Rice, R.W., (2004) J. Catal., 224, p. 304; Liu, H., Kozlov, A.I., Kozlova, A.P., Shido, T., Iwasawa, Y., (1999) Phys. Chem. Chem. Phys., 1, p. 2851; Ouyang, X., Bednarova, L., Besser, R.S., Ho, P., (2005) AIChE J., 51, p. 1758; Chin, S.Y., Alexeev, O.S., Amiridis, M.D., (2005) Appl. Catal. A: General, 286, p. 157; Sirijaruphan, A., Goodwin, J.G., Rice, R.W., (2004) J. Catal., 221, p. 288","author":["Siani, A","Captain, B","Alexeev","S, O","Stafyla, E","Hungria","B, A","Midgley","A, P","Thomas","M, J","Adams","D, R","Amiridis","D, M"],"author_short":["Siani, A.","Captain, B.","Alexeev","S, O.","Stafyla, E.","Hungria","B, A.","Midgley","A, P.","Thomas","M, J.","Adams","D, R.","Amiridis","D, M."],"bibtex":"@article{ Siani2006a,\n abstract = {The catalytic performance of cluster-derived PtFe/SiO 2 bimetallic catalysts for the oxidation of CO has been examined in the absence and presence of H2 (PROX) and compared to that of Pt/SiO 2- PtFe 2/SiO 2 and Pt;Fe 2/SiO 2 samples were prepared from PtFe 2(COD)(CO) 8 and Pt 5Fe 2(COD) 2(CO) 12 organometallic cluster precursors, respectively. FTIR data indicate that both clusters can be deposited intact on the SiO 2 support. The clusters remained weakly bonded to the SiO 2 surface and could be extracted with CH 2Cl 2 without any significant changes in their structure. Subsequent heating in H 2 led to complete decarbonylation of the supported clusters at approximately 350°C and the formation of Pt-Fe nanoparticles with sizes in the 1-2 nm range, as indicated by HRTEM imaging. A few larger nanoparticles enriched in Pt were also observed, indicating that a small fraction of the deposited clusters were segregated to the individual components following the hydrogen treatment. A higher degree of metal dispersion and more homogeneous mixing of the two metals were observed during HRTEM/XEDS analysis with the cluster-derived samples, as compared to a PtFe/SiO 2 catalyst prepared through a conventional impregnation route. Furthermore, the cluster-derived PtFe 2/SiO 2 and Pt 5Fe 2/SiO 2 samples were more active than Pt/SiO 2 and the conventionally prepared PtFe/SiO 2 sample for the oxidation of CO in air. However, substantial deactivation was also observed, indicating that the properties of the Pt-Fe bimetallic sites in the cluster-derived samples were altered by exposure to the reactants. The Pt 5Fe 2/SiO 2 sample was also more active than Pt/SiO 2 for PROX with a selectivity of approximately 92% at 50°C. In this case, the deactivation with time on stream was substantially slower, indicating that the highly reducing environment under the PROX conditions helps maintain the properties of the active Pt-Fe bimetallic sites. © 2006 American Chemical Society.},\n address = {Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States},\n annote = {Cited By (since 1996): 39\n\nExport Date: 15 January 2013\n\nSource: Scopus\n\nCODEN: LANGD\n\ndoi: 10.1021/la053476a\n\nLanguage of Original Document: English\n\nCorrespondence Address: Amiridis, M.D.; Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, United States\n\nReferences: Santra, A.K., Goodman, D.W., (2002) Electrochim. Acta, 47, p. 3595; \nSong, C., (2002) Catal. Today, 77, p. 17; \nFierro, J.L.G., Pena, M.A., (2005) Catal. Sci. Ser., 5, p. 229; \nAdams, W.A., Blair, J., Bullock, K.R., Gardner, C.L., (2005) J. Power Sources, 145, p. 55; \nFarrauto, R.J., Flytzani-Stephanopulos, M., (2005) Fuel Processing and PEM Fuel Cells: Advanced Catalysts, Adsorbents and Electrocatalysts, , Elsevier: Amsterdam; \nChoudhary, T.V., Goodman, D.W., (2002) Catal. Today, 77, p. 65; \nLevec, J., (2005) Opportunities in Catalytic Reaction Engineering. Examples of Heterogeneous Catalysis in Water Remediation and Preferential CO Oxidation, p. 103. , Galan, M. A., Martin del Valle, E., Eds.; Wiley: Chichester, U.K; \nManasilp, A., Gulari, E., (2004) Appl. Catal. B, 37, p. 17; \nOh, S.H., Sinkevitch, R.M., (1993) J. Catal., 142, p. 254; \nIto, S., Fujimori, T., Nagashima, K., Yuzaki, K., Kunimori, K., (2000) Catal. Today, 57, p. 247; \nSuh, D.J., Kwak, C., Kim, J.-H., Kwon, S.M., Park, T.-J., (2005) J. Power Sources, 142, p. 70; \nAlexeev, O.S., Gates, B.C., (2003) Ind. Eng. Chem. Res., 42, p. 1571; \nSnytnikov, P.V., Sobyanin, V.A., Belyaev, V.D., Shlyapin, D.A., (2003) Khimiya Interesakh Ustoichivogo Razvinya, 11, p. 297; \nSchubert, M.M., Kahlich, M.J., Feldmeyer, G., Huttner, M., Hackenberg, S., Gasteiger, H.A., Behm, R.J., (2001) Phys. Chem. Chem. Phys., 3, p. 1123; \nKorotkikh, O., Farrauto, R., (2000) Catal. Today, 62, p. 249; \nKotobuki, M., Watanabe, A., Uchida, H., Yamashita, H., Watanabe, M., (2005) J. Catal., 256, p. 262; \nSon, I.H., Lane, A.M., (2001) Catal. Lett., 76, p. 151; \nLiu, X., Korotkikh, O., Farrauto, R., (2002) Appl. Catal. A: General, 226, p. 293; \nMcDermott, J.X., White, J.F., Whitesides, G.M., (1976) J. Am. Chem. Soc., 98, p. 6521; \nAdams, R.D., Arafa, I., Chen, G., Lii, J.C., Wang, J.G., (1990) Organometallics, 9, p. 2350; \nFarrugia, L.J., Howard, J.A.K., Mitrachachon, P., Stone, F.G.A., Woodward, P., (1981) J. Chem. Soc., Dalton Trans., p. 1134; \nAlexeev, O., Gates, B.C., (2000) Top. Catal., 10, p. 273; \nGuczi, L., Beck, A., (1988) Polyhedron, 7, p. 2387; \nBraterman, P.S., (1975) Metal Carbonyl Spectra, , Academic Press: London; \nGracía, F.J., Bollmann, L., Wolf, E.E., Miller, J.T., Kropf, A.J., (2003) J. Catal., 220, p. 382; \nAlexeev, O.S., Chin, S.Y., Engelhard, M.H., Ortiz-Soto, L., Amiridis, M.D., (2005) J. Phys Chem. B, 109, p. 23430; \nSinfelt, J.H., (1983) Bimetallic Catalysts: Discoveries, Concepts, and Applications, , Wiley: New York; \nPonec, V., Bond, G.C., (1995) Catalysis by Metals and Alloys, , Elsevier: Amsterdam; \nLobree, L.J., Hwang, I., Reimer, J.A., Bell, A.T., (1999) J. Catal., 186, p. 242; \nSirijaruphan, A., Goodwin, J.G., Rice, R.W., (2004) J. Catal., 224, p. 304; \nLiu, H., Kozlov, A.I., Kozlova, A.P., Shido, T., Iwasawa, Y., (1999) Phys. Chem. Chem. Phys., 1, p. 2851; \nOuyang, X., Bednarova, L., Besser, R.S., Ho, P., (2005) AIChE J., 51, p. 1758; \nChin, S.Y., Alexeev, O.S., Amiridis, M.D., (2005) Appl. Catal. A: General, 286, p. 157; \nSirijaruphan, A., Goodwin, J.G., Rice, R.W., (2004) J. Catal., 221, p. 288},\n author = {Siani, A and Captain, B and Alexeev, O S and Stafyla, E and Hungria, A B and Midgley, P A and Thomas, J M and Adams, R D and Amiridis, M D},\n issn = {07437463 (ISSN) },\n journal = {Langmuir},\n keywords = {Bimetals,Carbon inorganic compounds,Carbon monoxide,Conventional impregnation route,Decarbonylation,Fourier transform infrared spectroscopy,Hydrogen,Metal dispersion,Organometallic cluster precursors,Organometallics,Oxidation,Platinum compounds,Segregation (metallography),Silica},\n number = {11},\n pages = {5160--5167},\n title = {{Improved CO oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO 2 catalysts}},\n url = {https://www.scopus.com/inward/record.url?eid=2-s2.0-33745759894\\&partnerID=40\\&md5=377ca96b1d1603c70f0442ded70322dd},\n volume = {22},\n year = {2006}\n}","bibtype":"article","id":"Siani2006a","issn":"07437463 (ISSN)","journal":"Langmuir","key":"Siani2006a","keywords":"Bimetals,Carbon inorganic compounds,Carbon monoxide,Conventional impregnation route,Decarbonylation,Fourier transform infrared spectroscopy,Hydrogen,Metal dispersion,Organometallic cluster precursors,Organometallics,Oxidation,Platinum compounds,Segregation (metallography),Silica","number":"11","pages":"5160--5167","title":"Improved CO oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO 2 catalysts","type":"article","url":"https://www.scopus.com/inward/record.url?eid=2-s2.0-33745759894\\&partnerID=40\\&md5=377ca96b1d1603c70f0442ded70322dd","volume":"22","year":"2006","role":"author","urls":{"Paper":"https://www.scopus.com/inward/record.url?eid=2-s2.0-33745759894\\&partnerID=40\\&md5=377ca96b1d1603c70f0442ded70322dd"},"bibbaseid":"siani-captain--s-stafyla--b--a--m--d--d-improvedcooxidationactivityinthepresenceandabsenceofhydrogenoverclusterderivedptfesio2catalysts-2006"},"bibtype":"article","biburl":"http://www2.uca.es/dept/cmat_qinor/nanomat/People/Hungria.bib","downloads":0,"search_terms":["improved","oxidation","activity","presence","absence","hydrogen","over","cluster","derived","ptfe","sio","catalysts","siani","captain","alexeev","s","stafyla","hungria","b","midgley","a","thomas","m","adams","d","amiridis","d"],"title":"Improved CO oxidation activity in the presence and absence of hydrogen over cluster-derived PtFe/SiO 2 catalysts","title_words":["improved","oxidation","activity","presence","absence","hydrogen","over","cluster","derived","ptfe","sio2","catalysts"],"year":2006,"dataSources":["HXzkPiKpD4u9iJ9ci"]}