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Revealing Distance-Dependent Synergy between MnCo2O4 and Co-N-C in Boosting the Oxygen Reduction Reaction.
Guo, Liming; Wan, Xin; Liu, Jieyuan; Guo, Xu; Liu, Xiaofang; Shang, Jiaxiang; Yu, Ronghai; Shui, Jianglan.
Afiliación
  • Guo L; School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China.
  • Wan X; School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China.
  • Liu J; School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China.
  • Guo X; School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China.
  • Liu X; School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China.
  • Shang J; School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China.
  • Yu R; School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China.
  • Shui J; School of Materials Science and Engineering, Beihang University, No. 37 Xueyuan Road, Beijing 100191, China.
ACS Appl Mater Interfaces ; 16(3): 3388-3395, 2024 Jan 24.
Article en En | MEDLINE | ID: mdl-38214267
ABSTRACT
Synergistic effects have been applied to a variety of hybrid electrocatalysts to improve their activity and selectivity. Understanding the synergistic mechanism is crucial for the rational design of these types of catalysts. Here, we synthesize a MnCo2O4/Co-N-C hybrid electrocatalyst for the oxygen reduction reaction (ORR) and systematically investigate the synergy between MnCo2O4 nanoparticles and Co-N-C support. Theoretical simulations reveal that the synergy is closely related to the distance between active sites. For a pair of remote active sites, the ORR proceeds through the known 2e- + 2e- relay catalysis while the direct 4e- ORR occurs on a pair of adjacent active sites. Therefore, the formation of the undesired byproduct (H2O2) is inhibited at the interface region between MnCo2O4 and Co-N-C. This synergistic effect is further verified on an anion-exchange membrane fuel cell. The findings deepen the understanding of synergistic catalysis and will provide guidance for the rational design of hybrid electrocatalysts.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos