The role of the interface between Cu and metal oxides in the ethanol dehydrogenation

Autor(es)

Finger, Pedro H. ^[1] ; Osmari, Taynara A. ^[2] ; Costa, Matheus S. ^[1] ; Bueno, Jose Maria C. ^[2] ; Gallo, Jean Marcel R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem, Rod Washington Luis, KM 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem Engn, Rod Washington Luis, KM 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: APPLIED CATALYSIS A-GENERAL; v. 589, JAN 5 2020.
• Citações Web of Science: 3

Resumo

Seeking to understand the role of the interface Cu-support in the dehydrogenative coupling between ethanol and acetaldehyde, mesoporous silica was used as a model support to allow creating Cu nanoparticles interfacing with metal oxides, such as Al2O3, Cr2O3, ZnO and ZrO2. The reaction rate for ethyl acetate formation increased as: 10Cu/MCM-41 < 5Cr(2)O(3)-10Cu/MCM-41 < 5Al(2)O(3)-10Cu/MCM-41 < 5ZrO(2)-10Cu/MCM-41 = 5ZnO-10Cu/MCM-41. It was also found a correlation between the TOF for acetaldehyde or ethyl acetate formation and the ethanol enthalpy of adsorption in the metal oxide. This brings an evidence that the extension of the ethanol dehydrogenation is dependent on the activation of ethanol by the metal oxide and that the dehydrogenative coupling takes place in the interface Cu-(metal oxide). (AU)

• Processo FAPESP: 17/11027-8 - Catalisadores bifuncionais à base de fosfato para a conversão de sacarídeos derivados da biomassa
• Beneficiário: Pedro Henrick Finger
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/02128-2 - Desenvolvimento de novos sistemas catalíticos para a biorrefinaria
• Beneficiário: Jean Marcel Ribeiro Gallo
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 18/01258-5 - Novos processos catalíticos e fotocatalíticos para a conversão direta de metano e CO2 em produtos
• Beneficiário: José Maria Correa Bueno
• Modalidade de apoio: Auxílio à Pesquisa - Temático