Evaluation of carbon supported platinum-ruthenium nanoparticles for ammonia electro-oxidation
Carregando...
Data
Data de publicação
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
International Journal of Hydrogen Energy
ODS
Exportar
Resumo
Ammonia electro-oxidation reaction (AmER) was investigated by using conventional electrochemical experiments, direct ammonia fuel cell (DAFC) and galvanostatic electrolysis experiments. The working electrode/anodes were composed of carbon supported PtRu/C nanoparticles (NPs) with atomic Pt:Ru ratios of 100:0, 90:10, 70:30 and 50:50. The resulting nanoparticles ranged between 5.1 and 7.3 nm in size depending on the Ru content and were analyzed by XRD, TEM and synchrotron radiation photoelectron Spectroscopy (SRPES). Alloying Pt with Ru shifted AmER to the lower onset potentials compared to Pt/C. Among nanostructured PtRu/C electrocatalysts, the Pt90Ru10 composition showed the best activity and stability in the conventional electrochemical (cyclic voltammetry and chronoamperometry) experiments, DAFC and 8 h galvanostatic electrolysis. The concentration of nitrite and nitrate was doubled using PtRu/C 90:10 compared to Pt/C, because of excess of OHads species formed on Ru. The results show that the addition of small amount of Ru to Pt NPs improves the AmER due to additional formation of OHads that promote the reaction on alloyed PtRu nanoparticles. Crown Copyright (C) 2016 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. All rights reserved.
Como referenciar
SILVA, JULIO C.M.; NTAIS, SPYRIDON; TEIXEIRA-NETO, ERICO; SPINACE, ESTEVAM V.; CUI, XIAOYU; NETO, ALMIR O.; BARANOVA, ELENA A. Evaluation of carbon supported platinum-ruthenium nanoparticles for ammonia electro-oxidation: Combined fuel cell and electrochemical approach. International Journal of Hydrogen Energy, v. 42, n. 1, p. 193-201, 2017. DOI: 10.1016/j.ijhydene.2016.09.135. Disponível em: http://repositorio.ipen.br/handle/123456789/27847. 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.