The effect of support on Pd1Nb1 electrocatalysts for ethanol fuel cells
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2020
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Pd1Nb1/C on different kinds of carbon black were prepared by a modified sol-gel method. The alkaline
direct ethanol fuel cell (ADEFC) performance was performed first with the Pd1Nb1 electrocatalysts and
then by varying the fuel concentration. In CV, Pd1Nb1/Printex 6L (50:50 wt%) exhibited 2.2 times higher
mass activity than that of the Pd/C (Alfa Aesar); their mass activities were 1300 and 590 mA mg 1
Pd ,
respectively. The best performance for the ADEFC was obtained using Pd1Nb1/Printex 6L, which yielded a
maximum power density and cell voltage of 28 mW cm 2 and 1.17 V, respectively. The Pd1Nb1/Printex 6L
electrocatalyst exhibited a more negative onset potential for the CO stripping reaction. We suggest that
the higher hydrophilicity (contact angle) and higher degree of disorder of Printex 6L (Raman) corroborates
these results. In addition, both bifunctional and electronic effects operated on the electrocatalyst
due to the presence of metal oxides and alloys of PdNb (XRD), respectively, in the synthesized electrocatalysts.
Therefore, it was notable that the support has an essential roledas important as the cocatalystdin
the electrocatalytic performance.
Como referenciar
SOUZA, FELIPE M.; NANDENHA, JULIO; OLIVEIRA, VITOR H.A.; PAZ, EDSON C.; PINHEIRO, VICTOR S.; AVEIRO, LUCI R.; PARREIRA, LUANNA S.; SILVA, JULIO C.M.; BATISTA, BRUNO L.; NETO, ALMIR O.; SANTOS, MAURO C. The effect of support on Pd1Nb1 electrocatalysts for ethanol fuel cells. Renewable Energy, v. 150, p. 293-306, 2020. DOI: 10.1016/j.renene.2019.12.110. Disponível em: http://repositorio.ipen.br/handle/123456789/31445. Acesso em: 19 Apr 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.