Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H2 generation via selective decomposition of hydrous hydrazine

Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H2 generation via selective decomposition of hydrous hydrazine. He, b, L., Huang, Y., Wang, A., Liu, Y., Liu, X., Chen, X., Delgado, J‥, Wang, X., & Zhang, T. Journal of Catalysis, 298:1--9, 2013.

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Hydrous hydrazine, such as hydrazine monohydrate (N2H 4·H2O), is a promising hydrogen carrier material due to its high content of hydrogen (8.0 wt%). The decomposition of hydrous hydrazine to H2 with a high selectivity and a high activity under mild conditions is the key to its potential usage as a hydrogen carrier material. Platinum-modified Ni/Al2O3 catalysts (NiPt x/Al2O3) were prepared starting from Ni-Al hydrotalcite and tested in the decomposition of hydrous hydrazine. Compared with Ni/Al2O3, the TOF was enhanced sevenfold over NiPt 0.057/Al2O3; meanwhile, the selectivity to H2 was increased to 98%. Characterization results by means of HAADF-STEM, XRD, and EXAFS revealed the presence of surface Pt-Ni alloy in this Pt-promoted catalyst. The formation of Pt-Ni alloy could significantly weaken the interaction between adspecies produced (including H2 and NH x) and surface Ni atoms, which is confirmed by microcalorimetry and TPD results. The weakening effect could account for the greatly enhanced reaction rate, as well as H2 selectivity on NiPtx/Al 2O3 catalysts. © 2012 Elsevier Inc. All rights reserved.

@article{ He20131,
  abstract = {Hydrous hydrazine, such as hydrazine monohydrate (N2H 4·H2O), is a promising hydrogen carrier material due to its high content of hydrogen (8.0 wt%). The decomposition of hydrous hydrazine to H2 with a high selectivity and a high activity under mild conditions is the key to its potential usage as a hydrogen carrier material. Platinum-modified Ni/Al2O3 catalysts (NiPt x/Al2O3) were prepared starting from Ni-Al hydrotalcite and tested in the decomposition of hydrous hydrazine. Compared with Ni/Al2O3, the TOF was enhanced sevenfold over NiPt 0.057/Al2O3; meanwhile, the selectivity to H2 was increased to 98%. Characterization results by means of HAADF-STEM, XRD, and EXAFS revealed the presence of surface Pt-Ni alloy in this Pt-promoted catalyst. The formation of Pt-Ni alloy could significantly weaken the interaction between adspecies produced (including H2 and NH x) and surface Ni atoms, which is confirmed by microcalorimetry and TPD results. The weakening effect could account for the greatly enhanced reaction rate, as well as H2 selectivity on NiPtx/Al 2O3 catalysts. © 2012 Elsevier Inc. All rights reserved.},
  annote = {cited By (since 1996)0},
  author = {He, L.a b and Huang, Y.a and Wang, A.a and Liu, Y.a and Liu, X.a and Chen, X.c and Delgado, J.J.c and Wang, X.a and Zhang, T.a},
  doi = {10.1016/j.jcat.2012.10.012},
  issn = {00219517},
  journal = {Journal of Catalysis},
  keywords = { Alloys; Aluminum; Catalyst selectivity; Hydrazine; Hydrogen; Hydrogen storage; Platinum; Reaction rates; Temperature programmed desorption, Platinum alloys,Efficient catalysts; EXAFS; HAADF-STEM; High activity; High selectivity; High-content; Hydrazine monohydrate; Hydrogen carriers; Hydrotalcites; Hydrous hydrazines; Micro-calorimetry; Ni atoms; Pt-Ni alloys; Selective decomposition; Weakening effect; XRD},
  pages = {1--9},
  title = {{Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H2 generation via selective decomposition of hydrous hydrazine}},
  url = {https://www.scopus.com/inward/record.url?eid=2-s2.0-84873331253\&partnerID=40\&md5=a02c8f2c1f26fc702c7bedb64c3cb028},
  volume = {298},
  year = {2013}
}

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The decomposition of hydrous hydrazine to H2 with a high selectivity and a high activity under mild conditions is the key to its potential usage as a hydrogen carrier material. Platinum-modified Ni/Al2O3 catalysts (NiPt x/Al2O3) were prepared starting from Ni-Al hydrotalcite and tested in the decomposition of hydrous hydrazine. Compared with Ni/Al2O3, the TOF was enhanced sevenfold over NiPt 0.057/Al2O3; meanwhile, the selectivity to H2 was increased to 98%. Characterization results by means of HAADF-STEM, XRD, and EXAFS revealed the presence of surface Pt-Ni alloy in this Pt-promoted catalyst. The formation of Pt-Ni alloy could significantly weaken the interaction between adspecies produced (including H2 and NH x) and surface Ni atoms, which is confirmed by microcalorimetry and TPD results. The weakening effect could account for the greatly enhanced reaction rate, as well as H2 selectivity on NiPtx/Al 2O3 catalysts. © 2012 Elsevier Inc. All rights reserved.},\n annote = {cited By (since 1996)0},\n author = {He, L.a b and Huang, Y.a and Wang, A.a and Liu, Y.a and Liu, X.a and Chen, X.c and Delgado, J.J.c and Wang, X.a and Zhang, T.a},\n doi = {10.1016/j.jcat.2012.10.012},\n issn = {00219517},\n journal = {Journal of Catalysis},\n keywords = { Alloys; Aluminum; Catalyst selectivity; Hydrazine; Hydrogen; Hydrogen storage; Platinum; Reaction rates; Temperature programmed desorption, Platinum alloys,Efficient catalysts; EXAFS; HAADF-STEM; High activity; High selectivity; High-content; Hydrazine monohydrate; Hydrogen carriers; Hydrotalcites; Hydrous hydrazines; Micro-calorimetry; Ni atoms; Pt-Ni alloys; Selective decomposition; Weakening effect; XRD},\n pages = {1--9},\n title = {{Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H2 generation via selective decomposition of hydrous hydrazine}},\n url = {https://www.scopus.com/inward/record.url?eid=2-s2.0-84873331253\\&partnerID=40\\&md5=a02c8f2c1f26fc702c7bedb64c3cb028},\n volume = {298},\n year = {2013}\n}</pre>\n</div>\n\n\n<div class=\"well well-small bibbase\" id=\"abstract_He20131\"\n style=\"display:none\">\n Hydrous hydrazine, such as hydrazine monohydrate (N2H 4·H2O), is a promising hydrogen carrier material due to its high content of hydrogen (8.0 wt%). The decomposition of hydrous hydrazine to H2 with a high selectivity and a high activity under mild conditions is the key to its potential usage as a hydrogen carrier material. Platinum-modified Ni/Al2O3 catalysts (NiPt x/Al2O3) were prepared starting from Ni-Al hydrotalcite and tested in the decomposition of hydrous hydrazine. Compared with Ni/Al2O3, the TOF was enhanced sevenfold over NiPt 0.057/Al2O3; meanwhile, the selectivity to H2 was increased to 98%. Characterization results by means of HAADF-STEM, XRD, and EXAFS revealed the presence of surface Pt-Ni alloy in this Pt-promoted catalyst. The formation of Pt-Ni alloy could significantly weaken the interaction between adspecies produced (including H2 and NH x) and surface Ni atoms, which is confirmed by microcalorimetry and TPD results. The weakening effect could account for the greatly enhanced reaction rate, as well as H2 selectivity on NiPtx/Al 2O3 catalysts. © 2012 Elsevier Inc. All rights reserved.\n</div>\n\n\n</div>\n","downloads":1,"keyword":["Alloys; Aluminum; Catalyst selectivity; Hydrazine; Hydrogen; Hydrogen storage; Platinum; Reaction rates; Temperature programmed desorption","Platinum alloys","Efficient catalysts; EXAFS; HAADF-STEM; High activity; High selectivity; High-content; Hydrazine monohydrate; Hydrogen carriers; Hydrotalcites; Hydrous hydrazines; Micro-calorimetry; Ni atoms; Pt-Ni alloys; Selective decomposition; Weakening effect; XRD"],"abstract":"Hydrous hydrazine, such as hydrazine monohydrate (N2H 4·H2O), is a promising hydrogen carrier material due to its high content of hydrogen (8.0 wt%). The decomposition of hydrous hydrazine to H2 with a high selectivity and a high activity under mild conditions is the key to its potential usage as a hydrogen carrier material. Platinum-modified Ni/Al2O3 catalysts (NiPt x/Al2O3) were prepared starting from Ni-Al hydrotalcite and tested in the decomposition of hydrous hydrazine. Compared with Ni/Al2O3, the TOF was enhanced sevenfold over NiPt 0.057/Al2O3; meanwhile, the selectivity to H2 was increased to 98%. Characterization results by means of HAADF-STEM, XRD, and EXAFS revealed the presence of surface Pt-Ni alloy in this Pt-promoted catalyst. The formation of Pt-Ni alloy could significantly weaken the interaction between adspecies produced (including H2 and NH x) and surface Ni atoms, which is confirmed by microcalorimetry and TPD results. The weakening effect could account for the greatly enhanced reaction rate, as well as H2 selectivity on NiPtx/Al 2O3 catalysts. © 2012 Elsevier Inc. All rights reserved.","annote":"cited By (since 1996)0","author":["He","b, L.a","Huang, Y.a","Wang, A.a","Liu, Y.a","Liu, X.a","Chen, X.c","Delgado, J.J.c","Wang, X.a","Zhang, T.a"],"author_short":["He","b, L.","Huang, Y.","Wang, A.","Liu, Y.","Liu, X.","Chen, X.","Delgado, J‥","Wang, X.","Zhang, T."],"bibtex":"@article{ He20131,\n abstract = {Hydrous hydrazine, such as hydrazine monohydrate (N2H 4·H2O), is a promising hydrogen carrier material due to its high content of hydrogen (8.0 wt%). The decomposition of hydrous hydrazine to H2 with a high selectivity and a high activity under mild conditions is the key to its potential usage as a hydrogen carrier material. Platinum-modified Ni/Al2O3 catalysts (NiPt x/Al2O3) were prepared starting from Ni-Al hydrotalcite and tested in the decomposition of hydrous hydrazine. Compared with Ni/Al2O3, the TOF was enhanced sevenfold over NiPt 0.057/Al2O3; meanwhile, the selectivity to H2 was increased to 98%. Characterization results by means of HAADF-STEM, XRD, and EXAFS revealed the presence of surface Pt-Ni alloy in this Pt-promoted catalyst. The formation of Pt-Ni alloy could significantly weaken the interaction between adspecies produced (including H2 and NH x) and surface Ni atoms, which is confirmed by microcalorimetry and TPD results. The weakening effect could account for the greatly enhanced reaction rate, as well as H2 selectivity on NiPtx/Al 2O3 catalysts. © 2012 Elsevier Inc. All rights reserved.},\n annote = {cited By (since 1996)0},\n author = {He, L.a b and Huang, Y.a and Wang, A.a and Liu, Y.a and Liu, X.a and Chen, X.c and Delgado, J.J.c and Wang, X.a and Zhang, T.a},\n doi = {10.1016/j.jcat.2012.10.012},\n issn = {00219517},\n journal = {Journal of Catalysis},\n keywords = { Alloys; Aluminum; Catalyst selectivity; Hydrazine; Hydrogen; Hydrogen storage; Platinum; Reaction rates; Temperature programmed desorption, Platinum alloys,Efficient catalysts; EXAFS; HAADF-STEM; High activity; High selectivity; High-content; Hydrazine monohydrate; Hydrogen carriers; Hydrotalcites; Hydrous hydrazines; Micro-calorimetry; Ni atoms; Pt-Ni alloys; Selective decomposition; Weakening effect; XRD},\n pages = {1--9},\n title = {{Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H2 generation via selective decomposition of hydrous hydrazine}},\n url = {https://www.scopus.com/inward/record.url?eid=2-s2.0-84873331253\\&partnerID=40\\&md5=a02c8f2c1f26fc702c7bedb64c3cb028},\n volume = {298},\n year = {2013}\n}","bibtype":"article","doi":"10.1016/j.jcat.2012.10.012","id":"He20131","issn":"00219517","journal":"Journal of Catalysis","key":"He20131","keywords":"Alloys; Aluminum; Catalyst selectivity; Hydrazine; Hydrogen; Hydrogen storage; Platinum; Reaction rates; Temperature programmed desorption, Platinum alloys,Efficient catalysts; EXAFS; HAADF-STEM; High activity; High selectivity; High-content; Hydrazine monohydrate; Hydrogen carriers; Hydrotalcites; Hydrous hydrazines; Micro-calorimetry; Ni atoms; Pt-Ni alloys; Selective decomposition; Weakening effect; XRD","pages":"1--9","title":"Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H2 generation via selective decomposition of hydrous hydrazine","type":"article","url":"https://www.scopus.com/inward/record.url?eid=2-s2.0-84873331253\\&partnerID=40\\&md5=a02c8f2c1f26fc702c7bedb64c3cb028","volume":"298","year":"2013","role":"author","urls":{"Paper":"https://www.scopus.com/inward/record.url?eid=2-s2.0-84873331253\\&partnerID=40\\&md5=a02c8f2c1f26fc702c7bedb64c3cb028"},"bibbaseid":"-b-huang-wang-liu-liu-chen-delgado-wang-zhang-surfacemodificationofnial2o3withpthighlyefficientcatalystsforh2generationviaselectivedecompositionofhydroushydrazine-2013"},"bibtype":"article","biburl":"http://www2.uca.es/dept/cmat_qinor/nanomat/People/Delgado.bib","downloads":1,"search_terms":["surface","modification","al2o3","highly","efficient","catalysts","generation","via","selective","decomposition","hydrous","hydrazine","he","b","huang","wang","liu","liu","chen","delgado","wang","zhang"],"title":"Surface modification of Ni/Al2O3 with Pt: Highly efficient catalysts for H2 generation via selective decomposition of hydrous hydrazine","title_words":["surface","modification","al2o3","highly","efficient","catalysts","generation","via","selective","decomposition","hydrous","hydrazine"],"year":2013,"dataSources":["FMdTKEbMWYtQ7jKBs"]}