Cerium doped graphene-based materials towards oxygen reduction reaction catalysis

Autor(es)

Lucchetti, Lanna E. B. ; Autreto, Pedro A. S. ; Santos, Mauro C. ; de Almeida, James M.

• Tipo de documento: Artigo Científico
• Fonte: MATERIALS TODAY COMMUNICATIONS; v. 38, p. 6-pg., 2024-03-01.

Resumo

With the global transition towards cleaner energy and sustainable processes, the demand for efficient catalysts, especially for the oxygen reduction reaction, has gained attention from the scientific community. This research work investigates cerium -doped graphene-based materials as catalysts for this process with density functional theory calculations. The electrochemical performance of Ce-doped graphene was assessed within the computation hydrogen electrode framework. Our findings reveal that Ce doping, especially when synergized with an oxygen atom, shows improved catalytic activity and selectivity. For instance, Ce doping in combination with an oxygen atom, located near a border, can be selective for the 2 -electron pathway. Overall, the combination of Ce doping with structural defects and oxygenated functions lowers the reaction free energies for the oxygen reduction compared to pure graphene, and consequently, might improve the catalytic activity. This research sheds light from a computational perspective on Ce-doped carbon materials as a sustainable alternative to traditional costly metal -based catalysts, offering promising prospects for green energy technologies and electrochemical applications. (AU)

• Processo FAPESP: 19/01925-4 - Aplicação de eletrodos de difusão gasosa modificados com materiais avançados na eletrossíntese de peróxido de hidrogênio e posterior degradação de poluentes orgânicos
• Beneficiário: Lanna Emilli Barbosa Lucchetti
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 17/10118-0 - Estudo e aplicação da tecnologia eletroquímica para a análise e a degradação de interferentes endócrinos: materiais, sensores, processos e divulgação científica
• Beneficiário: Marcos Roberto de Vasconcelos Lanza
• Modalidade de apoio: Auxílio à Pesquisa - Temático