针对电解水析氢电极材料活性低、稳定性差等问题,开展高稳定性催化材料研究。通过NiCu含量的调整,构筑类Pt电子结构,实现析氢电极材料活性和稳定性提升。采用大气等离子喷涂将不同比例的NiCu混合粉末沉积在Ni基体上,制备可控测试的电极样品,通过电化学测试和物性表征探究Cu含量对Ni电极析氢性能的影响。结果表明：Cu含量的变化显著影响电极样品析氢活性,在30% KOH溶液中,当Cu含量为65%时,驱动电流密度为100 mA/cm2的析氢反应的过电位最低,为400 mV,与纯镍相比,过电位降低了20%以上。且循环2000圈后,电极的催化性能无明显变化,NiCu合金电极在碱性条件下具有优异的稳定性。
Abstract
Aiming at the problems of low activity and poor stability of electrode materials for electrolytic water hydrogen evolution, research on high stability catalytic materials was carried out. By adjusting the content of NiCu, the Pt-like electronic structure is constructed, and the activity and stability of hydrogen evolution electrode materials are improved. Different proportions of mixed powder of NiCu were deposited on Ni substrate by atmospheric plasma spraying, and controllable electrode samples were prepared. The influence of Cu content on hydrogen evolution performance of Ni electrode was explored by electrochemical test and physical property characterization. The results show that the change of Cu content significantly affects the hydrogen evolution activity of electrode samples. When the Cu content is 65% in 30% KOH solution, the overpotential of the hydrogen evolution reaction with the driving current density of 100 mA/cm2 is the lowest, which is 400 mV, which is lower than that of pure nickel by more than 20%. After 2000 cycles, the catalytic performance of the electrode has no obvious change, and the NiCu alloy electrode has excellent stability under alkaline conditions.
关键词
氢能 /
催化剂 /
析氢反应 /
过渡金属 /
大气等离子喷涂
Key words
catalyst /
hydrogen evolution reaction /
transition metals /
atmospheric plasma spraying
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基金
广东省科学院“百人计划”项目（2019GDASYL-0102007）;广东省科学院中法表面工程联合实验室项目（2022GDASZH-2022010203）;高水平科技创新平台培育与提升项目（20220102）
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