Tuning the Adsorption of H and OH on Ruthenium Aerogel to Boost the Alkaline Hydrogen Evolution.

ABSTRACT: Ruthenium (Ru) is an ideal alternative to platinum for the alkaline hydrogen evolution reaction (HER) due to its exceptional catalytic performance. However, during the reaction, the excessively strong adsorption of proton (H) and hydroxyl (OH) species on Ru significantly limits its alkaline HER activity. Herein, we enhanced the alkaline HER performance of Ru by modulating its crystalline phase structure and incorporating a low dosage of Cr ions. The synthesized Cr_0.033Ru_{0.967 fcc/hcp} aerogel exhibits a lower overpotential of only 14 mV at 10 mA cm^-2, outperforming Ru aerogels (Ru_fcc and Ru_hcp) and commercial Pt/C catalysts. Moreover, Cr_0.033Ru_{0.967 fcc/hcp} aerogel demonstrates a remarkable stability at 500 mA cm

SUBMITTER: Liu Y 

PROVIDER: S-EPMC12624330 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature