Effect of Metal Coordination Fashion on Oxygen Electrocatalysis of Cobalt-Manganese Oxides.

ABSTRACT: The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are the most critical reactions that limit the efficiency of fuel cells, water electrolyzers, and metal-air batteries. Therefore, a need exists to develop cost-effective and highly active alternative electrocatalysts for ORR and OER. This study investigates the influence of metal coordination fashion on electrocatalytic ORR and OER activities among three types of Co-Mn bimetallic oxides (CMOs): tunnel-type (CMO_T), layer-type (CMO_L), and spinel-type (CMO_S) structures. An electrochemical evaluation for CMOs verifies that CMO_L has the highest ORR and OER specific activities, which is relatively better than the previously reported bifunctional metal oxides. Additionally, atomic configuration analysis for the oxides sug

SUBMITTER: Sugawara Y 

PROVIDER: S-EPMC7675927 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature