含磷的镍基合金对氢析出的电催化活性的研究

Study of Fabrication and Structure of Nickel Base Alloy Containing Phosphorus and Their Electrocatalytic Activity for Hydrogen Evolution Reaction

用电沉积的方法制备了镍磷、镍钴、镍钴磷及镍铈磷合金电极，并用电化学和 Ｘ Ｐ Ｓ 等方法研究了上述电极对析氢反应的电催化活性、电极的电子结构及析氢机理。实验结果表明：在镍钴合金中加入第三元素磷以后，引起合金中的金属原子的未配对ｄ 电子向 Ｐ 转移，使得合金中的电子结构和各元素的电子结合能发生变化，导致吸附氢键强度的改变，使之有利于氢析出。镍钴磷及镍铈磷合金电极对析氢反应具有较高的催化活性。

Nickel-phosphorus, nickel-cobalt-phosphorus and nickel-cerium-phosphorus alloy could be fabricated by electrodeposition method, and their electronic structure and electrocatalytic activity for hydrogen evolution reaction were studied with electrochemical and XPS methods. It was shown that phosphorus was introduced into nickel-cobalt alloy as the third element ,electron transferred from metals to phosphorus in the alloy. As a result ,electronic binding energies of each element in the alloy and electronic structure was changed and it lead to intensity of adsorbing hydrogen bond changed. Therefore, it is favorable for hydrogen evolution reaction. Nickel-cobalt-phosphorus alloy and nickel-cerium-phosphorus alloy have higher electrocatalytic activity for hydrogen evolution reaction.