Amorphous Co-NiB@NF as an Efficient Electrocatalyst for Urea Oxidation Reaction

Transition metal-based catalysts designed for efficient urea oxidation reactions (UOR) are essential for hydrogen production via urea-assisted water electrolysis. The amorphous cobalt-doped nickel boride electrocatalyst supported on nickel foam (Co-NiB@NF) was in-situ synthesized using the stepwise chemical deposition method (SCDM). B and Co lowers the energy barrier for generating Ni³⁺ active centers, while the unique structure of Co-NiB@NF offers abundant active sites. The catalyst achieves a potential of only 1.29 V at 10 mA·cm⁻² and maintains 83% current retention over 10 hours.