Artificially steering electrocatalytic oxygen evolution reaction mechanism by regulating oxygen defect contents in perovskites.

ABSTRACT: The regulation of mechanism on the electrocatalysis process with multiple reaction pathways is more efficient and essential than conventional material engineering for the enhancement of catalyst performance. Here, by using oxygen evolution reaction (OER) as a model, which has an adsorbate evolution mechanism (AEM) and a lattice oxygen oxidation mechanism (LOM), we demonstrate a general strategy for steering the two mechanisms on various La_xSr_1-xCoO_3-δ. By delicately controlling the oxygen defect contents, the dominant OER mechanism on La_xSr_1-xCoO_3-δ can be arbitrarily transformed between AEM-LOM-AEM accompanied by a volcano-type activity variation trend. Experimental and computational evidence exp

SUBMITTER: Lu M 

PROVIDER: S-EPMC9337758 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature