Acid-treated PtSn/C and PtSnCu/C electrocatalysts for ethanol electro-oxidation
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International Journal of Hydrogen Energy
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PtSn/C with Pt:Sn atomic ratio of 50:50 and PtSnCu/C electrocatalysts with different
Pt:Sn:Cu atomic ratios were prepared using NaBH4 as reducing agent and carbon black
Vulcan XC72 as support. In a second step, the electrocatalysts were treated with nitric acid
to remove the less noble metals (chemical dealloying). The obtained materials were
characterized by X-ray diffraction, EDX analysis, TEM images with EDX scan-line and cyclic
voltammetry. The electro-oxidation of ethanol was studied by chronoamperometry and on
single direct ethanol fuel cell (DEFC). The X-ray diffractograms of the as-synthesized
electrocatalysts showed the typical face-centered cubic (FCC) structure of Pt alloys. After
acid treatment the FCC structure was maintained and Sn and Cu atoms were removed
from the nanoparticles surface. Chronoamperometry measurements showed a strong increase of performance of PtSn/C and PtSnCu/C electrocatalysts after acid treatment;
however, under DEFC conditions at 100 C, only acid-treated PtSn/C electrocatalyst showed
superior performance compared to commercial PtSn/C from BASF.
Como referenciar
CRISAFULLI, R.; ANTONIASSI, R.M.; OLIVEIRA NETO, A.; SPINACE, E.V. Acid-treated PtSn/C and PtSnCu/C electrocatalysts for ethanol electro-oxidation. International Journal of Hydrogen Energy, v. 39, n. 11, p. 5671-5677, 2014. DOI: 10.1016/j.ijhydene.2014.01.111. Disponível em: http://repositorio.ipen.br/handle/123456789/23210. 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.