Stabilization of a Mn-Co Oxide During Oxygen Evolution in Alkaline Media.

ABSTRACT: Improving the stability of electrocatalysts for the oxygen evolution reaction (OER) through materials design has received less attention than improving their catalytic activity. We explored the effects of Mn addition to a cobalt oxide for stabilizing the catalyst by comparing single phase CoO_x and (Co_0.7Mn_0.3)O_x films electrodeposited in alkaline solution. The obtained disordered films were classified as layered oxides using X-ray absorption spectroscopy (XAS). The CoO_x films showed a constant decrease in the catalytic activity during cycling, confirmed by oxygen detection, while that of (Co_0.7Mn_0.3)O_x remained constant within error as measured by electrochemical metrics. These trends were rationalized

SUBMITTER: Villalobos J 

PROVIDER: S-EPMC9328349 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature