Fuel cell and electrochemical studies of the ethanol electro-oxidation in alkaline media using PtAuIr/C as anodes
Carregando...
Data
Data de publicação
2018
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
É parte de
BRAZILIAN MRS MEETING, 17th
Exportar
Resumo
The use of fossil fuels has resulted in an increase of CO2 concentration in the
atmosphere . It is well known that CO2 emission from fossil fuels is one of the
principals responsible for the greenhouse effect. Taking these aspects into
account,fuel cells might bean excelente alternative to the current energy
generation as a clean and eficiente power source. In this context, alkaline fuel
cells have attracted worldwide attention due to its promise to produce clean
energy with high efficiency [1], thus direct etanol fuel cell could offer an
alternative for electrical energy generation. In this work, ethanol electrooxidation
reaction was investigated considering conventional electrochemical
experiments in alkaline media, direct ethanol fuel cell (DEFC), and in situ ATRFTIR.
The working electrode/anodes were composed of monometallic Pt/C, Au/C,
Ir/C, and trimetallic PtAuIr/C nanoparticles with atomic Pt/Au/Ir ratios of
40:50:10, 50:40:10, 60:30:10, 70:20:10, and 80:10:10. X-ray diffraction (XRD)
suggests PtAuIr/C alloy formation, and according to transmission electron
micrographs, the mean particle sizes are from 4 to 6 nm for all catalyst
compositions. PtAuIr/C 40:50:10 showed the highest catalytic activity for ethanol electro-oxidation in the electrochemical experiments;
using this material, the peak current density from ethanol electro-oxidation on
cyclic voltammetry experimente was 50 Ma per g of Pt, 3.5 times higher than that
observed with Pt/C. The fuel cell performance was superior using all PtAuIr/C
compositions than using Pt/C. Au/C and Ir/C presented very poor catalytic activity
toward etanol electro-oxidation. The improved results obtained using PtAuIr/C
might be related to the OHads species formed at low overpotential on Ir and to
the decrease on adsorption energy of poisoning intermediates on Pt sites,
promoted by Au.
Como referenciar
SILVA, SIRLANE G.; FONTES, ERIC H.; SILVA, JULIO C.M.; ASSUMPÇAO, MONICA H.M.T.; OLIVEIRA NETO, ALMIR; LINARDI, MARCELO. Fuel cell and electrochemical studies of the ethanol electro-oxidation in alkaline media using PtAuIr/C as anodes. In: BRAZILIAN MRS MEETING, 17th, September 16-20, 2018, Natal, RN. Abstract... São Carlos: Aptor Software, 2018. p. 387-387. Disponível em: http://repositorio.ipen.br/handle/123456789/30340. Acesso em: 30 Dec 2025.
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.