Low cost, high activity and stability electrocatalysts for hydrogen evolution reaction (HER) have been extensively studied in recent years. We have successfully synthesized a transition metal phosphide electrocatalyst (CoNi@CP) with coating structure. The CoNi@CP was prepared with the mild conditions. An organophosphorus ligand was synthesized by simple organic reaction. It was synthesized by coordination with Co²⁺ and Ni²⁺ and then calcined. CoNi@CP has abundant and uniform phosphorus atom doping, no energy consumption in phosphating process, and avoids the generation of highly toxic gas PH₃. Because of its special coating structure, the adsorption of H^∗ on its surface was enhanced, and the active center of CoNi was protected, which contributed greatly to the improvement of catalytic performance. At 10 mA/cm² current density, the overpotential of the catalyst only 74 mV, and the slope of Tafel was only 83 mVdec^-1. The performance of the catalyst remained unchanged after 1000 stability tests. In addition, we had proved theoretically that the catalyst had high HER activity by DFT calculation. Therefore, it provides inspiration for us to better develop efficient transition metal phosphide electrocatalysts.

近年来，用于析氢反应（HER）的低成本、高活性和稳定性电催化剂得到了广泛的研究。我们成功合成了一种具有涂层结构的过渡金属磷化物电催化剂（CoNi@CP）。CoNi@CP 在温和的条件下制备。通过简单的有机反应合成了有机磷配体。通过与Co ²⁺和Ni ²⁺配位合成，然后煅烧。CoNi@CP磷原子掺杂丰富且均匀，磷化过程无能耗，避免产生剧毒气体PH ₃。由于其特殊的涂层结构，H ^*的吸附其表面得到增强，保护了 CoNi 的活性中心，对催化性能的提高做出了很大贡献。在10 mA/cm ²电流密度下，催化剂的过电位仅为74 mV，Tafel的斜率仅为83 mVdec ^-1。催化剂的性能在 1000 次稳定性测试后保持不变。此外，我们通过DFT计算从理论上证明了该催化剂具有较高的HER活性。因此，它为我们更好地开发高效的过渡金属磷化物电催化剂提供了启示。