Highly active Ag/C nanoparticles containing ultra-low quantities of sub-surface Pt for the electrooxidation of glycerol in alkaline media

Autor(es)

Lima, Carlos C. ^[1] ; Rodrigues, Marta V. F. ^[1] ; Neto, Antonio F. M. ^[1] ; Zanata, Cinthia R. ^[2] ; Pires, Cleo T. G. V. M. T. ^[1] ; Costa, Luelc S. ^{[1, 3]} ; Solla-Gullon, Jose ^[4] ; Fernandez, Pablo S. ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] States Univ Campinas, Inst Chem, UNICAMP, BR-13083970 Campinas, SP - Brazil

^[2] Fed Univ Mato Grosso do Sul UFMS, Inst Chem, BR-79074460 Campo Grande, MS - Brazil

^[3] Ctr Innovat New Energies CINE, BR-13083841 Campinas, SP - Brazil

^[4] Univ Alicante, Inst Electrochem, Apdo 99, E-03080 Alicante - Spain

• Tipo de documento: Artigo Científico
• Fonte: APPLIED CATALYSIS B-ENVIRONMENTAL; v. 279, DEC 15 2020.
• Citações Web of Science: 0

Resumo

The practical application of Pt-based technologies depends on the lowering in the costs and one way to face this challenge is by reducing the amount of Pt. Herein, we decorate Ag nanoparticles with ultra-small (0.8 %) quantities of Pt and test them for the electrooxidation of glycerol. We showed that the Pt atoms of our catalyst are one order of magnitude more active (in terms of mass activity) than Pt/C commercial catalyst. By performing in situ FTIR measurements, electrolysis experiments and HPLC analysis, we showed that both catalysts form mainly glycerate and lactate, but Pt/C is more prone to poisoning and to form carbonate. We suggest that this different behavior is attributed to the high dispersion of the Pt atoms on Ag nanoparticles. The lower probability of finding neighboring Pt atoms diminishes the formation of multiple bonded intermediates, which are precursors for the formation of carbonate and some poisoning intermediates. (AU)

• Processo FAPESP: 16/01365-0 - Eletro-oxidação de glicerol sobre nanopartículas metálicas com interesse em ciência básica e aplicada. Coprodução de energia e de compostos de alto valor econômico
• Beneficiário: Pablo Sebastián Fernández
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular
• Processo FAPESP: 17/11986-5 - Divisão de Pesquisa 1 - Portadores Densos de Energia
• Beneficiário: Ana Flávia Nogueira
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 18/20952-0 - Estudos fundamentais e aplicados sobre conversão eletroquímica álcoois e CO2
• Beneficiário: Pablo Sebastián Fernández
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular