Role of Dissolution Intermediates in Promoting Oxygen Evolution Reaction at RuO2(110) Surface

By K. Klyukin, Alexandra Zagalskaya, V. Alexandrov. Journal of Physical Chemistry C, 2019

157 citations recorded by the source corpus.

RuO2 is one of the most active electrocatalysts toward oxygen evolution reaction (OER), but it suffers from rapid dissolution in electrochemical environments. It is also established experimentally that corrosion of metal oxides can, in fact, promote catalytic activity for OER owing to the formation of a surface hydrous amorphous layer. However, the mechanistic interplay between corrosion and OER across metal-oxide catalysts and to what degree these two processes are correlated are still debated. Herein, we employ ab initio molecular dynamics-based blue moon ensemble approach in combination with OER thermodynamic analysis to reveal a clear mechanistic coupling between Ru dissolution and OER at the RuO2(110)/water interface. Specifically, we demonstrate that (i) dynamic transitions between metastable dissolution intermediates greatly affect catalytic activity toward OER, (ii) dissolution and OER processes share common intermediates with OER promoting Ru detachment from the surface, (iii) the lattice oxygen ...

Subfields: Electrical and Electronic Engineering, Electrochemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/66df2f0f27c5e54b772588311c9415f3ef365ed6

Citations in the corpus

• Non-iridium-based electrocatalyst for durable acidic oxygen evolution reaction in proton exchange membrane water electrolysis (2022, unknown): “The second is the direct demetallation of surface Ru, which can also result in crystal structure collapse of Ru-based catalysts 35–37 .”