Support Effects of Microwave-Synthesized Ru-Based Catalysts on Their Hydrogen Evolution Performance in Acidic Media.

ABSTRACT: Ruthenium-based catalysts supported on TiO₂, SnO₂, and WO₃ were synthesized via a microwave-assisted rapid reduction method and evaluated for the hydrogen evolution reaction (HER) in acidic media. The Ru species existed as highly dispersed nanoclusters, as confirmed by XRD and TEM, and the catalytic activity was strongly dependent on the oxide support. Ru/TiO₂ exhibited the best HER performance, achieving an overpotential of 187 mV at 10 mA·cm^-2 and a Tafel slope of 97.56 mV·dec^-1. While particle size differences (1.8-3.7 nm) did not account for the activity trend, XPS revealed distinct metal-support interactions that modulated the electronic state of Ru. Ru/TiO₂ showed an intermediate electron depletion that opti

SUBMITTER: Liu L 

PROVIDER: S-EPMC12844415 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature