Role of the state of the metal component on the light-off performance of Pd-based three-way catalysts. Ferńandez-García, M., Iglesias-Juez, A., Martínez-Arias, A., Hungría, B, A., Anderson, A, J., Conesa, C, J., & Soria, J. Journal of Catalysis, 221(2):594--600, Inst. de Catalisis y Petroleoquimica, CSIC, Campus Cantoblanco, 28049 Madrid, Spain, 2004.
Role of the state of the metal component on the light-off performance of Pd-based three-way catalysts [link]Paper  abstract   bibtex   
The behavior of Pd-based systems supported on alumina and ceria-zirconia and the complex ceria-zirconia on alumina was investigated during light-off tests using a stoichiometric C3H6 + CO + NO + O 2 mixture. In situ XANES/DRIFTS studies of the Pd chemical state at the surface and bulk of the materials were conducted to determine the noble metal response to the gas atmosphere during light off. The initial, oxidized PdO-like phase was converted to Pd(0) in all cases except for the ceria-zirconia-supported catalyst. Contact between Pd and bulk ceria-zirconia particles appeared to stabilize Pd clusters in the 373-673 K region with an average Pd(I)-like oxidation state. The presence of hydrocarbon in the gas phase was essential in order to stabilize these Pd(I)-like species. The role of such a phase in providing a source of active oxygen for hydrocarbon oxidation is shown here to strongly decrease light off temperature and this, together with its stability over a wide range of temperatures, may offer a contribution to reducing hydrocarbon emissions during cold start. © 2003 Elsevier Inc. All rights reserved.
@article{ Fernandez-Garcia2004,
  abstract = {The behavior of Pd-based systems supported on alumina and ceria-zirconia and the complex ceria-zirconia on alumina was investigated during light-off tests using a stoichiometric C3H6 + CO + NO + O 2 mixture. In situ XANES/DRIFTS studies of the Pd chemical state at the surface and bulk of the materials were conducted to determine the noble metal response to the gas atmosphere during light off. The initial, oxidized PdO-like phase was converted to Pd(0) in all cases except for the ceria-zirconia-supported catalyst. Contact between Pd and bulk ceria-zirconia particles appeared to stabilize Pd clusters in the 373-673 K region with an average Pd(I)-like oxidation state. The presence of hydrocarbon in the gas phase was essential in order to stabilize these Pd(I)-like species. The role of such a phase in providing a source of active oxygen for hydrocarbon oxidation is shown here to strongly decrease light off temperature and this, together with its stability over a wide range of temperatures, may offer a contribution to reducing hydrocarbon emissions during cold start. © 2003 Elsevier Inc. All rights reserved.},
  address = {Inst. de Catalisis y Petroleoquimica, CSIC, Campus Cantoblanco, 28049 Madrid, Spain},
  annote = {Cited By (since 1996): 26

Export Date: 15 January 2013

Source: Scopus

doi: 10.1016/j.jcat.2003.09.022

Language of Original Document: English

Correspondence Address: Ferń{a}ndez-García, M.; Inst. de Catalisis y Petroleoquimica, CSIC, Campus Cantoblanco, 28049 Madrid, Spain; email: m.fernandez@icp.csic.es

Chemicals/CAS: aluminum oxide, 1302-74-5, 1318-23-6, 1344-28-1, 14762-49-3; cerium, 7440-45-1; zirconium oxide, 1314-23-4, 53801-45-9

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  author = {Ferń{a}ndez-García, M and Iglesias-Juez, A and Martínez-Arias, A and Hungría, A B and Anderson, J A and Conesa, J C and Soria, J},
  issn = {00219517 (ISSN) },
  journal = {Journal of Catalysis},
  keywords = {Alumina,Ceria-zirconia,DRIFTS,Light off,Pd,TWCs,XANES,aluminum oxide,article,catalysis,catalyst,cerium,field emission,gas,hydrocarbon,infrared spectroscopy,metal,oxidation,palladium,stoichiometry,temperature,zirconium oxide},
  number = {2},
  pages = {594--600},
  title = {{Role of the state of the metal component on the light-off performance of Pd-based three-way catalysts}},
  url = {https://www.scopus.com/inward/record.url?eid=2-s2.0-0742272562\&partnerID=40\&md5=bd3820ef144b2d9fb2452cc1836501bc},
  volume = {221},
  year = {2004}
}

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