Engineering Lattice Distortion in Ruthenium Oxide Enables Robust Acidic Water Oxidation via Direct O–O Coupling

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract Ruthenium is considered one of the most promising alternatives to iridium as an anode electrocatalyst for proton exchange membrane water electrolysis (PEMWE). However, Ru‐based electrocatalysts suffer from poor stability, primarily due structural collapse under harsh acidic conditions oxygen evolution reaction (OER). Here, a design strategy introduced that significantly enhances both stability and activity RuO 2 by switching catalytic mechanism adsorbate (AEM) oxide pathway (OPM). This achieved through lattice distortion engineering using co‐doping involving large‐radius ions (Na⁺ Hf 4+ ). The incorporation Na + into induces significant distortion, shortening partial Ru─Ru bond distance optimizing electronic structure. modification facilitates direct O–O radical coupling, confirmed in situ vibrational measurements theoretical calculations. It can drive current density 1 A cm −2 PEMWE device at 60 °C with 1.646 V operates stably 85 h 0.5 . present study highlights synergistic interaction between two adjacent Ru sites promote coupling effective enhancing OER performance

Language: Английский

Rational theoretical modeling for reconstructed transition metal sulfides: insights into oxygen evolution reaction catalysts

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский