Cerium doped graphene-based materials towards oxygen reduction reaction catalysis

Author(s)

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

• Document type: Journal article
• Source: MATERIALS TODAY COMMUNICATIONS; v. 38, p. 6-pg., 2024-03-01.

Abstract

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)

• FAPESP's process: 19/01925-4 - Application of gas diffusion electrodes modified with advanced materials in hydrogen peroxide electrosynthesis applied for the degradation of organic pollutants
• Grantee: Lanna Emilli Barbosa Lucchetti
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support Opportunities: Research Projects - Thematic Grants