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Abstract In proton exchange membrane water electrolysis (PEMWE), catalysts for acidic oxygen evolution reaction (OER) that demonstrate high current density and stability are essential. Herein, we synthesized La‐doped RuO 2 (La‐RuO 2 @TM) nanorod composite catalysts in situ on titanium mesh (TM) using a one‐step low‐temperature pyrolysis method. La‐RuO 2 @TM displays excellent catalytic performance (1.533 V at 100 mA cm −2 ) and remarkable stability, showing no significant degradation in performance over 450 hours of operation. Density functional theory (DFT) calculations indicate that the formation of the La‐O−Ru local structure modulates the adsorption strength of reaction intermediates, alleviates metal (Ru) leaching, and reduces oxygen loss, significantly enhancing the material‘s durability in acidic OER. The PEM electrolyzer utilizing La‐RuO 2 @TM operates at 1.815 V with a current density of 1.0 A cm −2 , maintaining stable performance for 120 h at 60 °C. This study offers valuable insights for designing efficient and durable acidic OER catalysts.
Zhang et al. (Thu,) studied this question.