纳米多孔MoNi/Al_(3)Ni_(2)材料制备及电催化析氢性能的研究  

Preparation of nanoporous MoNi/Al_(3)Ni_(2)structure and study onelectrocatalytic properties for hydrogen evolution

作　　者：孙群翔 梁砚琴[1] 朱胜利[1] 李朝阳[1] 姜辉[1] SUN Qunxiang;LIANG Yanqin;ZHU Shengli;LI Zhaoyang;JIANG Hui(School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学材料科学与工程学院,天津300350

出　　处：《功能材料》2022年第11期11143-11149,共7页Journal of Functional Materials

摘　　要：开发非贵金属高效电催化剂是降低电解水制氢成本的关键。通过激光直写技术以及脱合金在泡沫镍基底上制备了一种自支撑的纳米多孔MoNi/Al_(3)Ni_(2)催化剂。该催化剂的纳米多孔结构增加了催化反应的活性位点,MoNi和Al_(3)Ni_(2)之间的协同效应使催化剂在碱性介质(1 mol/L KOH)中表现出优异的析氢性能。电化学测试结果表明,Al含量为80%时制备的MoNi/Al_(3)Ni_(2)催化剂在10 mA/cm^(2)的电流密度下,过电位仅为31 mV,且表现出良好的电化学长期稳定性,在10 mA/cm^(2)的电流密度下,稳定催化析氢100 h以上,为工业电解水析氢用电催化剂的大规模制备提供了理论指导。The development of non-precious metal high-efficiency electrocatalysts is the key to reducing the cost of hydrogen production from water electrolysis.In this paper,a self-supporting nanoporous MoNi/Al_(3)Ni_(2) catalyst was prepared on a nickel foam substrate by laser direct writing and dealloying.The nanoporous structure of the catalyst produces more active sites after dealloying,and the synergistic effect between MoNi and Al_(3)Ni_(2) enables the catalyst to exhibit excellent HER performance in alkaline medium(1 mol/L KOH).The MoNi/Al_(3)Ni_(2) catalyst with Al content of 80%shows an overpotential of only 31 mV at a current density of 10 mA/cm^(2) along with impressive stability at the current density of 10 mA/cm^(2) for 100 h,which provides a good strategy for hydrogen evolution in industrial water splitting.

关 键 词：激光直写技术 析氢反应 MoNi/Al_(3)Ni_(2) 脱合金 

分 类 号：TQ151.1[化学工程—电化学工业] TB34[一般工业技术—材料科学与工程]