Highly porous CuZnAl layered double hydroxides prepared by biochar-templated co-precipitation method as catalysts for the preferential oxidation of CO reaction

Autor(es)

Lima Goncalves, Rosembergue Gabriel ; Petrolini, Davi Domingos ; Firmino Marcos, Francielle Candian ; Assaf, Jose Mansur ; Assaf, Elisabete Moreira

• Tipo de documento: Artigo Científico
• Fonte: APPLIED CLAY SCIENCE; v. 232, p. 8-pg., 2023-02-01.

Resumo

This study evaluates the effect of the porosity of Layered Double Hydroxide (LDH) containing copper (Cu), zinc (Zn), and aluminum (Al) synthesized by a co-precipitation method with biochar as a hard template on the preferential oxidation of CO (CO-PROX) reaction. Experimental data showed biochar as a hard template pro-moted structural changes in the LDH, such as 9 to 42 nm increase in pore size, decrease in the copper oxide crystallite size, and increase in metallic area, and enhanced its activity in the CO-PROX reaction. In situ DRIFTS analyses revealed CO was adsorbed on both Cu+ and Cu0 sites and Cu+ was the main species during the reaction for all catalysts. (AU)

• Processo FAPESP: 17/08293-8 - Projeto 14: síntese direta de metanol a partir de CO2
• Beneficiário: Francielle Candian Firmino Marcos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 19/10980-9 - Acoplamento oxidativo do metano utilizando catalisadores do tipo A2B2O7
• Beneficiário: Davi Domingos Petrolini
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 20/15230-5 - Centro de Pesquisa e Inovação de Gases de Efeito Estufa - RCG2I
• Beneficiário: Julio Romano Meneghini
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia