Developing efficient, low‐cost electrocatalysts for the hydrogen evolution reaction (HER) is crucial for sustainable hydrogen production through water electrolysis. Herein, we report a phosphorus‐doped ruthenium–molybdenum oxide catalyst supported on nickel foam (RuMoO x ‐P/NF) synthesized via two‐step immersing and rapid pulsed Joule heating. RuMo‐based nanoparticles are uniformly loaded on the NF substrate, and phosphorus doping could modulate the electronic properties of RuMoO x ‐P/NF. The obtained RuMoO x ‐P/NF exhibits exceptional HER performance in alkaline media, requiring low overpotentials of 16 and 70 mV to achieve current densities of 10 and 100 mA cm −2 , respectively—outperforming its undoped counterpart and commercial Pt/C. It also demonstrates outstanding stability with negligible activity loss after 100 h of operation. Various pH‐dependent experiments, cyclic voltammetry, and step current experiments demonstrate the strong hydrogen adsorption capacity of RuMoO x ‐P/NF catalyst, significantly accelerating the HER. The temperature‐controlled electrochemical experiments confirm lower HER activation energy of RuMoO x ‐P/NF than that of phosphorus‐free counterpart. This study offers a viable strategy for designing highly active and stable low‐precious‐metal HER electrocatalysts for sustainable hydrogen production.
Jia et al. (Tue,) studied this question.