非晶Nd-Ni-B/NF稀土复合电极材料的制备及其析氢性能  

Amorphous Nd-Ni-B/NF Rare Earth Composites:Preparation and HER Electrocatalytic Performance

作　　者：朱云娜 陈必清 程天舒 杜婵 张士民 赵静 ZHU Yunna;CHEN Biqing;CHENG Tianshu;DU Chan;ZHANG Shimin;ZHAO Jing(College of Chemistry and Chemical Engineering,Qinghai Normal University,Xining 810000,China;Nano Science and Technology Institute,University of Science and Technology of China,Suzhou 215000,China)

机构地区：[1]青海师范大学化学化工学院,西宁810000 [2]中国科学技术大学纳米科学技术学院,苏州215000

出　　处：《无机材料学报》2021年第6期637-644,I0005,I0006,I0007,共11页Journal of Inorganic Materials

基　　金：国家自然科学基金重点项目(21553002);青海省科技计划项目(2016-ZJ-753)。

摘　　要：本研究采用简单的一步化学沉积法制备非晶纳米Nd-Ni-B/NF稀土复合电极并研究其析氢(Hydrogen evolution reaction,HER)性能。通过各种测试方法对纳米电极材料进行物相分析和形貌表征,并探索其电催化析氢性能和稳定性。结果表明,稀土Nd可提高电极的电催化析氢性能,当硝酸钕浓度为3 g·L^(–1)时,恒温35℃下施镀1 h,制备的Nd-Ni-B/NF电极析氢性能最佳。Nd-Ni-B/NF(Nickel foam)电极在1.0 mol·L^(–1)KOH溶液中,20 mA·cm^(–2)电流密度下的析氢过电位仅为180 mV,Tafel斜率为117 mV·dec^(–1),析氢反应由Volmer-Heyrovsky步骤控制。此外,Nd-Ni-B/NF电极具有优越的电化学稳定性,在持续电解12 h或2000次循环伏安测试后,催化剂的活性没有明显衰减。The amorphous nano-Nd-Ni-B rare earth(RE)alloy catalytic electrode on nickel foam(NF)was prepared by simple one-step electroless deposition method and served as a highly active hydrogen evolution reaction(HER)catalyst.Its microstructure and electrocatalytic HER performance were characterized.The results show that addition of Nd improved the electrocatalytic HER.The preparation conditions were optimized with neodymium nitrate of 3 g·L^(–1),reaction temperature of 35℃ and reaction time of 1 h.The Nd-Ni-B/NF electrode requires an overpotential of only 180 mV to achieve the current density of 20 mA·cm^(–2 )in 1.0 mol·L^(–1) KOH solution,and the corresponding Tafel slope is 117 mV·dec^(–1).HER of Nd-Ni-B/NF catalyst is controlled by Volmer-Heyrovsky step.Moreover,the Nd-Ni-B/Nf shows superior electrochemical stability,12 h chronoamperometry and 2000 sweeps of cyclic voltammetry with no obvious activity decay.

关 键 词：化学沉积 Nd-Ni-B 非晶纳米 析氢反应 泡沫镍 

分 类 号：TQ174[化学工程—陶瓷工业]