On the Operando Structure of Ruthenium Oxides during the Oxygen Evolution Reaction in Acidic Media.

ABSTRACT: In the search for rational design strategies for oxygen evolution reaction (OER) catalysts, linking the catalyst structure to activity and stability is key. However, highly active catalysts such as IrO_x and RuO_x undergo structural changes under OER conditions, and hence, structure-activity-stability relationships need to take into account the operando structure of the catalyst. Under the highly anodic conditions of the oxygen evolution reaction (OER), electrocatalysts are often converted into an active form. Here, we studied this activation for amorphous and crystalline ruthenium oxide using X-ray absorption spectroscopy (XAS) and electrochemical scanning electron microscopy (EC-SEM). We tracked the evolution of surface oxygen species in ruthenium oxides

SUBMITTER: Deka N 

PROVIDER: S-EPMC10242682 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature