Glycerol electrooxidation catalyzed by Pt-Sb supported in periodic mesoporous carbon CMK-3 and CMK-5

Autor(es)

Andrade, Renato N. de ^[1] ; Perini, Nickson ^{[1, 2]} ; Vieira, Jose Lucas ^{[1, 3]} ; Gallo, Jean Marcel R. ^{[1, 3]} ; Sitta, Elton ^{[1, 2]}

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 Estadual Campinas, Ctr Innovat New Energies CINE, BR-13083841 Campinas, SP - Brazil

^[3] Univ Fed Sao Carlos, Grp Renewable Energy Nanotechnol & Catalysis Gree, Dept Chem, Rod Washington Luis, KM 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 896, SEP 1 2021.
• Citações Web of Science: 0

Resumo

Glycerol is a biomass-derivative feedstock with potential use in direct alcohol fuel cells. In this work, we have studied the influence of distinct carbon-supports for N-Sb catalysts applied to glycerol electrooxidation reaction. The carbon matrixes were synthesized from Si templates with distinct geometries, giving the so-called CMK-3 and CMK-5, whose 3D structures were characterized employing SAXS, TGA, TEM, and N-2 adsorption isotherms. N nanoparticles were synthesized onto the carbon structures (Pt/C-x within X = CMK-3, CMK-5, or Vulcan) and converted to Pt-Sb/C catalysts by irreversible Sb2O3 adsorption on Pt/C-x covering up to 97% of N surface as inferred by cyclic voltammograms. Regardless of the carbon support, the onset of glycerol oxidation on N-Sb/C is ca 0.4 V (vs RHE), however, at higher potentials in cyclic voltammetric conditions or chroamperometric curves, Pt-Sb/CCMK-3 depicted the best activity among the synthesized catalysts, providing currents 1.6 and 2.0 times bigger than those in Pt-Sb/CCMK-5, and Pt-Sb/C-vulcan, respectively after 800 s at 0.5 V. The results are explained utilizing the coupled between the glycerol mass transport from bulk to active sites in carbon matrixes and re-adsorption of partially oxidized reaction products. (AU)

• Processo FAPESP: 20/04109-0 - Síntese de carbonos porosos ácidos para a conversão de glicose em HMF
• Beneficiário: José Lucas Vieira
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• 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: 17/11986-5 - Geração e Armazenamento de Novas Energias: trazendo desenvolvimento tecnológico para o país
• Beneficiário: Ana Flávia Nogueira
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia