Palladium nanoparticles supported on mesoporous biocarbon from coconut shell for ethanol electro‑oxidation in alkaline media
Carregando...
Data
2018
Data de publicação:
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
Materials for Renewable and Sustainable Energy
Exportar
Resumo
Palladium nanoparticles supported on carbon Vulcan XC72 (Pd/C) and biocarbon (Pd/BC) synthesized by sodium borohydride
process were used as catalysts for ethanol electro-oxidation in alkaline media. The biocarbon (BC) from coconut
shell with mesoporous and high surface area (792 m2 g−1) was obtained by carbonization at 900 °C and the hydrothermal
treatment in a microwave oven. The D-band and G-band intensity ratio (ID/IG) from Raman analysis showed high disorder of
the biocarbon, while X-ray photoelectron spectroscopy (XPS) suggests higher percentage of oxygen groups on the surface
of biocarbon than of Vulcan XC72. From X-ray diffraction (XRD), it was observed peaks in 2θ degree related to the face
centered cubic (fcc) structure of palladium and the mean crystallite sizes calculated based on the diffraction peak of Pd (220)
were 5.6 nm for Pd/C and 5.3 nm for Pd/BC. Using Transmission Electron Microscope (TEM), it was observed particles
well dispersed on both carbons support materials. The electrocatalytic activity of the materials was investigated by cyclic
voltammetry (CV) and chronoamperometry (CA) experiments. The peak current density (on CV experiments) from ethanol
electro-oxidation on Pd/BC was 50% higher than on Pd/C, while the current density measured at 15 min of CA experiments
was 80% higher on Pd/BC than on Pd/C. The higher catalytic activity of Pd/BC might be related to the large surface area of
the biocarbon (792 m2 g−1) vs (239 m2 g−1) of Vulcan carbon, the defects of the biocarbon structure and higher amount of
oxygen on the surface than Carbon Vulcan XC 72.
Como referenciar
FERREIRA, JOAO C.; CAVALLARI, ROGER V.; BERGAMASCHI, VANDERLEI S.; ANTONIASSI, RODOLFO M.; TEIXEIRA-NETO, ANGELA A.; LINARDI, MARCELO; SILVA, JULIO C.M. Palladium nanoparticles supported on mesoporous biocarbon from coconut shell for ethanol electro‑oxidation in alkaline media. Materials for Renewable and Sustainable Energy, v. 7, n. 4, 2018. DOI: 10.1007/s40243-018-0130-z. Disponível em: http://repositorio.ipen.br/handle/123456789/29304. Acesso em: 22 Mar 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.