Single Cu Atoms as Catalysts for Efficient Hydrazine Oxidation Reaction

Abstract The development of cost‐effective electrocatalysts is vital for promoting the practical application of hydrazine as a viable energy carrier. However, the catalytic performance of the single‐atom Cu catalyst has not been evaluated with regard to the hydrazine oxidation reaction (HzOR). Herein, single Cu atoms anchored on the surface of the P‐doped C₃N₄ substrate (Cu−SA/PCN) have been synthesized using a simple method that involved pyrolysis and phosphorization. The as‐obtained Cu−SA/PCN catalyst is observed to demonstrate a suitable efficiency for the electrocatalytic hydrazine oxidation at the anode in an alkaline aqueous solution. Remarkably, the catalyst exhibits an excellent electrolytic activity and strong durability for 30 h. Further, it displays a current density of 100 mA cm⁻² at a low applied potential of 0.336 V versus the reversible hydrogen electrode. Therefore, this study provides a strategy to manufacture single atom catalysts for an efficient HzOR in alkaline media.