Complex interplay of structural and surface properties of ceria on platinum supported catalyst under water gas shift reaction

Autor(es)

Meira, D. M. ; Ribeiro, R. U. ; Mathon, O. ; Pascarelli, S. ; Bueno, J. M. C. ; Zanchet, D.

• Tipo de documento: Artigo Científico
• Fonte: APPLIED CATALYSIS B-ENVIRONMENTAL; v. 197, p. 13-pg., 2016-11-15.

Resumo

Catalysts using platinum pre-formed nanoparticles were prepared as a strategy to evaluate the impact of structural and electronic properties of ceria-alumina-supports in the water gas shift reaction, minimizing variations of the metallic phase among samples. Promoted cerium Pt/Al2O3 catalysts, with 12 or 20 wt% of CeO2, were prepared by adding cerium precursor during the sol-gel synthesis of Al2O3 (GEL samples) or by impregnating it on the Al2O3 support (IMP samples). The presence of cerium in PtAl catalysts increases up to seven times the reaction rates and although the results showed significant impact of the preparation method on the structural and surface properties of ceria, the main dependence of the catalytic activity seems to be with the cerium loading. The results suggest the participation of interfacial Pt-O-Ce sites as the crucial contribution to the significant increases of specific reaction rate. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 11/50727-9 - Desenvolvimento de sistemas para produção de hidrogênio e para geração e utilização de energia eletro-química
• Beneficiário: Ernesto Rafael Gonzalez
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 10/52291-0 - Compreensao das propriedades estruturais e de superficie de catalisadores de platina promovidos com cerio atraves de tecnicas de caracterizacao in situ sob a reacao de deslocamento gas-agua
• Beneficiário: Débora Motta Meira
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/00523-0 - Caracterização in situ de catalisadores utilizando multi-técnicas em síncrotron
• Beneficiário: Débora Motta Meira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado