MWCNT-COOH supported PtSnNi electrocatalysts for direct ethanol fuel cells
Carregando...
Data
Data de publicação
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Renewable Energy
ODS
Exportar
Resumo
PtSnNi electrocatalysts (60: 40: 40 mass ratio) supported on Vulcan® XC-72 (Cabot) carbon and COOHfunctionalized
multiwalled carbon nanotubes (Cheaptubes®) with 15% of metal loading were prepared.
The nanoparticles size of 2e3 nm for both supports was estimated by HRTEM. In the direct ethanol fuel
cell experiments, PtSnNi/C presents 50 mA cm 2 reaching the maximum power density (MPD) of
12mWcm 2 and decreasing at higher currents, while PtSnNi/MWCNT-COOH obtains similar values of
MPD (60 mA cm 2), but keeping the best performance. By GC (gas chromatography) technique, it was
possible to observe that the electrocatalyst supported on MWCNT-COOH favored the ethanol oxidation to
acetaldehyde and acetic acid, although the material supported on Vulcan® XC-72 carbon presented
almost 100% of selectivity for acetaldehyde. This behavior was maintained also when the current of 0.1 A
was applied for 80 min. For the PtSnNi/C electrocatalyst, the selectivity to only acetaldehyde can be
related to Sn and Ni dissolution process that can become the electrocatalytic activity similar to Pt/C,
decreasing the power density as observed in our experiments. Established by EDS analysis, after 80 min
of polarization, the Ni and Sn relative atomic ratio was lower on the catalytic anodic layer of PtSnNi/C
than on PtSnNi/MWCNT-COOH.
Como referenciar
PARREIRA, LUANNA S.; ANTONIASSI, RODOLFO M.; FREITAS, ISABEL C.; OLIVEIRA, DANIELA C. de; SPINACE, ESTEVAM V.; CAMARGO, PEDRO H.C.; SANTOS, MAURO C. dos. MWCNT-COOH supported PtSnNi electrocatalysts for direct ethanol fuel cells: low Pt content, selectivity and chemical stability. Renewable Energy, v. 143, p. 1397-1405, 2019. DOI: 10.1016/j.renene.2019.05.067. Disponível em: http://repositorio.ipen.br/handle/123456789/30066. 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.