Exploring The Synergistic Effect Of CoSeP/CoP Interface Catalyst For Efficient Urea Electrolysis
Borong Lu, Chunmei Lv, Ying Xie, Lianxin Gao, Jun Yan, Kai Zhu, Guiling Wang, Dianxue Cao, Ke Ye
Abstract
Abstract Electrocatalytic oxidation of urea (UOR) is a potential energy‐saving hydrogen production technology that can replace oxygen evolution reaction (OER). Therefore, CoSeP/CoP interface catalyst is synthesized on nickel foam using hydrothermal, solvothermal, and in situ template methods. The strong interaction of tailored CoSeP/CoP interface promotes the hydrogen production performance of electrolytic urea. During the hydrogen evolution reaction (HER), the overpotential can reach 33.7 mV at 10 mA cm −2 . The cell voltage can reach 1.36 V at 10 mA cm −2 in the overall urea electrolytic process. Notably, the overall urine electrolysis performance of the catalyst in the human urine medium can reach 1.40 V at 10 mA cm −2 and can exhibit durable cycle stability at 100 mA cm −2 . Density functional theory (DFT) proves that the CoSeP/CoP interface catalyst can better adsorb and stabilize reaction intermediates CO* and NH* on its surface through a strong synergistic effect, thus enhancing the catalytic activity.