Clean synthesis of biocarbon-supported Ni@Pd core–shell particles via hydrothermal method for direct ethanol fuel cell anode application

• Autor(a) principal: Silva, Elen Almeida Leal da
• Data de Publicação: 2020
• Outros Autores: Cuña Suárez, Andrés, Reyes Plascencia, Carmina, Radtke, Claudio, Tancredi, Néstor, Malfatti, Célia de Fraga
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/216151
• topic: Etanol; Energia limpa; Eletrocatálise; Níquel; Paládio

Direct ethanol fuel cells (DEFCs) are devices for clean and sustainable energy production, where the generation of electrical energy occurs as a result of the anodic ethanol oxidation reaction (EOR). One of the main challenges of these devices is the development of cost-efective and sustainable anodic catalysts, minimizing the use of noble metals such as Pd. In this sense, biomass-derived carbon-supported core–shell nanoparticles of PdNi-based electrocatalyst are of great interest for EOR and its application in DEFCs. The purpose of this work was to demonstrate the possibility of synthesizing a core–shell Ni@Pd electrocatalysts via hydrothermal method, in a fast, simple and environmental friendly way. A biomass hydrothermal liquefaction method using nickel and palladium salts was used to synthesize a biocarbon-supported nickel/palladium core–shell electrocatalyst (Ni@Pd/aHC). The electrocatalyst was morphological and chemical characterized in order to confrm the core–shell particle formation. The electrochemical characterization showed that the Ni@Pd/aHC sample has good electrocatalytic behaviour and good stability over time. The EOR mechanism on the sample and their infuence in the faradaic efciency of a cell were also studied by spectroelectrochemical analysis.