Methane activation at low temperature in an acidic electrolyte using PdAu/C, PdCu/C, and PdTiO2/C electrocatalysts for PEMFC
Carregando...
Data
2020
Data de publicação:
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Research on Chemical Intermediates
Resumo
Pd/C, PdAu/C, PdCu/C, and PdTiO2/
C electrocatalysts were prepared by a
sodium borohydride reduction process for methane activation at low temperatures
in a PEMFC reactor. These electrocatalysts were characterized by XRD, TEM,
XPS, ICP-MS, ATR-FTIR, and cyclic voltammetry. The diffractograms of Pd/C,
PdAu(50:50)/C, PdCu(50:50)/C, and PdTiO2(
50:50)/C electrocatalysts showed
peaks associated with Pd face-centered cubic structure. PdAu(50:50)/C showed a
small shift in the peak center when it was compared to Pd/C, while PdCu(50:50)/C
showed a shift to higher angles when it was also compared to Pd/C. This effect can
be due to the formation of an alloy between Pd and Au, and Pd and Cu. By TEM
experiments, a mean nanoparticle size was observed between 6.9 and 8.9 nm for all
electrocatalysts. Cyclic voltammograms of Pd/C, PdAu/C, PdCu/C and PdTiO2/
C
electrocatalysts showed an increase in current density values after the adsorption of
methane The ATR-FTIR experiments showed for all electrocatalysts the formation
of methanol and formic acidic. Polarization curves at 80 °C acquired in a PEMFC
reactor showed that PdAu(50:50)/C and PdTiO2(
50:50)/C had superior performance
when compared to Pd/C, indicating the beneficial effect of adding the co-catalyst;
this behavior has been attributed to the bifunctional mechanism or electronic effect.
Como referenciar
SOUZA, FELIPE de M.; SOUZA, RODRIGO F.B. de; BATISTA, BRUNO L.; SANTOS, MAURO C. dos; FONSECA, FABIO C.; OLIVEIRA NETO, ALMIR; NANDENHA, JULIO. Methane activation at low temperature in an acidic electrolyte using PdAu/C, PdCu/C, and PdTiO2/C electrocatalysts for PEMFC. Research on Chemical Intermediates, v. 46, n. 5, p. 2481-2496, 2020. DOI: 10.1007/s11164-020-04102-1. Disponível em: http://repositorio.ipen.br/handle/123456789/31446. Acesso em: 28 Mar 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.