"Valence Oscillation of Ru Active Sites for Efficient and Robust Acidic" by Liming Deng, Sung Fu Hung et al.
The continuous oxidation and leachability of active sites in Ru-based catalysts hinder practical application in proton-exchange membrane water electrolyzers (PEMWE). Herein, robust inter-doped tungsten–ruthenium oxide heterostructures [(Ru–W)Ox] fabricated by sequential rapid oxidation and metal thermomigration processes are proposed to enhance the activity and stability of acidic oxygen evolution reaction (OER). The introduction of high-valent W species induces the valence oscillation of the Ru sites during OER, facilitating the cyclic transition of the active metal oxidation states and m...
Source: uow.edu.au