Synthesis of cerium oxide nanopowders for improving catalysts electroactivity in direct ethanol fuel cells
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2017
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PAN AMERICAN CONGRESS OF NANOTECHNOLOGY, 1st
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The search for alternative direct ethanol fuel cell catalyst supports to improve platinum
electrocatalysis requires the development of novel nanostructured conducting materials. In
order to boost energy conversion efficiencies, high surface-area supports with enhanced
oxophilicity have been addressed. This procedure might aid breaking the C–C bond and the
poisoning of platinum by strongly adsorbed species coming from the dissociative adsorption of
ethanol. In the present work, synthetic cerium oxide nanopowders were compared to
state-of-the-art carbon black supports for the ethanol oxidation reaction (EOR). Cerium oxides
were prepared via a simple chemical precipitation method using ammonium hydroxide as a
precipitant agent and the effect of thermal treatment of the synthesized nanopowders was
investigated. Microstructural analyses revealed an increase in crystallite size from 8.1 to 25.7
nm after heating from 400 to 800 °C, respectively. Supported catalysts containing 20 wt.% Pt
were prepared by a sodium borohydride impregnation–reduction method, in aqueous solution,
at room temperature. Electrochemical measurements of the EOR showed highest
electrocatalytic activity over samples calcined at 400 °C as a result of a combinantion between
an appropriate nano-scaled structure and oxygen transport in cerium oxide.
Como referenciar
CAMARGO, ELAINE F. de; CORDEIRO, GUILHERME L.; SANTOS, MONIQUE C.L.; PEREIRA, CONRADO de V.; USSUI, VALTER; LIMA, NELSON B. de; NETO, ALMIR O.; LAZAR, DOLORES R.R. Synthesis of cerium oxide nanopowders for improving catalysts electroactivity in direct ethanol fuel cells. In: PAN AMERICAN CONGRESS OF NANOTECHNOLOGY, 1st, 27-30 de novembro, 2017, Guarujá, SP. Abstract... Disponível em: http://repositorio.ipen.br/handle/123456789/29034. Acesso em: 30 Apr 2026.
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.