Ensemble effects of high entropy alloy for boosting alkaline water splitting coupled with urea oxidation

FeCoNiMoRu/CNFs exhibits a small potential of 1.43 V vs. RHE (100 mA cm(-2)) and superior stability for 90 h toward urea electro-oxidation (UOR). In situ electrochemical Raman results strongly demonstrate the ensemble effects of the various metal sites on improving the UOR activity by co-stabilizing the important intermediates. This work will open new directions in the application of high-entropy alloys for small molecule oxidation reactions.

Automated summary

FeCoNiMoRu/CNFs exhibits a low potential of 1.43 V vs. RHE (100 mA cm(-2)) and remarkable stability for 90 hours in urea electro-oxidation. In situ electrochemical Raman results strongly support the cooperative effects of different metal sites in improving the urea electro-oxidation activity by stabilizing crucial intermediates. This study will open new avenues for the application of high-entropy alloys in small molecule oxidation reactions.