Effect of Ni content in PdNi/C anode catalysts on power and methanol co-generation in alkaline direct methane fuel cell type
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PdNi electrocatalysts supported on carbon were used as anode materials for methane oxidation in alkaline
direct methane fuel cells (ADMEFCs). The electrocatalysts were successfully synthesized by the
NaBH4 reduction method. X-ray diffraction measurements showed the formation of non-alloyed Pd in
the face- centered cubic (FCC) structure for all materials and formation of NiO and Ni(OH)2 species.
TEM images showed that the metal particles are well dispersed on the support with small agglomeration
regions. Information about the surface structure of the catalyst were obtained by Raman spectra, mainly
confirming the presence of Ni(OH)2. The species observed by DEMS, that is, methanol (m/z = 32), CO2 (m/
z = 44) and potassium formate (m/z = 84) were confirmed by FTIR, which also showed the presence of a
high amount of carbonate in the methane oxidation products of the ADMEFC with Pd50Ni50/C as the
anode catalyst. Tests in ADMEFCs showed that the dependence of the maximum power density on nickel
content in the catalysts goes through a maximum value of 13.5 lW cm 2 at 50 at% Ni. Moreover, the
amount of produced methanol decreases with increasing Ni content in the PdNi/C catalysts. Both these
results can be explained by the enhanced methanol oxidation in the presence of nickel.
Como referenciar
SANTOS, M.C.L.; GODOI, C.M.; KANG, H.S.; SOUZA, R.F.B. de; RAMOS, A.S.; ANTOLINI, E.; NETO, A.O. Effect of Ni content in PdNi/C anode catalysts on power and methanol co-generation in alkaline direct methane fuel cell type. Journal of Colloid and Interface Science, v. 578, p. 390-401, 2020. DOI: 10.1016/j.jcis.2020.06.017. Disponível em: http://repositorio.ipen.br/handle/123456789/31365. Acesso em: 20 Mar 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.