Rh₂P nanoparticles were colloidally synthesized and used as electrocatalysts toward the hydrogen oxidation reaction (HOR) in alkaline electrolyte for the first time. It was found that Rh₂P exhibits remarkable catalytic performance, which is superior to Rh and even commercial Pt/C and can be attributed to the synergistic effect caused by the P atoms on the surface of Rh₂P. This work might open up a new avenue for expanding the family of electrocatalysts with advanced HOR performance in alkaline electrolyte.

    https://chemistry-europe.onlinelibrary.wiley.com/doi/full/10.1002/celc.201900129