Introducing Bronsted acid sites to accelerate the bridging-oxygen-assisted deprotonation in acidic water oxidation.

ABSTRACT: Oxygen evolution reaction (OER) consists of four sequential proton-coupled electron transfer steps, which suffer from sluggish kinetics even on state-of-the-art ruthenium dioxide (RuO₂) catalysts. Understanding and controlling the proton transfer process could be an effective strategy to improve OER performances. Herein, we present a strategy to accelerate the deprotonation of OER intermediates by introducing strong Brønsted acid sites (e.g. tungsten oxides, WO_x) into the RuO₂. The Ru-W binary oxide is reported as a stable and active iridium-free acidic OER catalyst that exhibits a low overpotential (235 mV at 10 mA cm^-2) and low degradation rate (0.014 mV h^-1) over a 550-hour stability test. Electrochemical studies, in-situ near-ambie

SUBMITTER: Wen Y 

PROVIDER: S-EPMC9388623 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature