镍基析氢电极在碱性溶液中析氢行为  

Electrochemical performance of porous Ni-based electrodes for hydrogen evolution reaction in alkaline solution

作　　者：吴靓[1,2,3] 郭小花 徐阳[1,2,3] 肖逸锋 许艳飞[1,2,3] 钱锦文[1,2,3] 管卓[1,2,3] 贺跃辉[4] 

机构地区：[1]湘潭大学机械工程学院,湘潭411105 [2]湘潭大学焊接机器人及应用技术湖南省重点实验室,湘潭411105 [3]湘潭大学复杂轨迹加工工艺及装备教育部工程研究中心,湘潭411105 [4]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《中国有色金属学报》2018年第2期309-318,共10页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51504213;51401175;51271158);湖南省重点研发计划项目(2015WK3021);湖南省自然科学基金资助项目(2015JJ3123);湖南省教育厅优秀青年项目(17B250)~~

摘　　要：采用元素粉末反应合成法制备多孔Ni_3Al-Mo电极。采用扫描电镜(SEM)和X射线衍射(XRD)对多孔Ni_3Al-Mo电极的孔结构进行表征,通过极化曲线和电化学阻抗技术表征多孔Ni_3Al-Mo电极的电解析氢行为。结果表明:多孔Ni_3Al-Mo电极孔隙率为47%,最大孔隙为2.7μm,平均孔隙约2.1μm。与多孔Ni_3Al电极和多孔Ni电极相比,多孔Ni_3Al-Mo电极具有较低的析氢过电位和较高的交换电流密度,表明多孔Ni_3Al-Mo电极具有较高的析氢活性;经过阳极处理后,多孔Ni_3Al-Mo电极的析氢活性可以恢复到原来的大小,且连续电解120 h后,析氢过电位变化不大,表明多孔Ni_3Al-Mo电极具有优异的电化学稳定性。Objective of this work was to investigate the electrochemical performance of porous Ni_3Al-Mo electrodes for hydrogen evolution reaction using cathodic polarization and impedance spectroscopy techniques. The morphology of the porous Ni_3Al-Mo electrode was characterized by scanning electron mircosope（SEM） and X ray diffration（XRD）. The results show that Ni_3Al-Mo electrode has a large porosity of 47%, the maximum pore size of 2.7 μm, the mean pore size of 2.1 μm and lower overpotential, higher exchange current density comparing to the porous Ni_3Al and porous Ni electrodes. After anodic treatment, the polarization curve becomes almost the same as the one recorded before the anodic treatment. The activity of the porous Ni_3Al-Mo electrode does not change much after the current interruptions, even after 120 h, which indicates that porous Ni_3Al-Mo electrode has higher hydrogen evolution activity and better electrocatalytic performance.

关 键 词：反应合成法 多孔Ni_3Al-Mo电极 极化曲线 阻抗谱 稳定性 

分 类 号：TG146[一般工业技术—材料科学与工程]