串连Co_(3)O_(4)十二面体的铜网自支撑电极用于电催化反应  

Copper mesh self-supported electrode with Co_(3)O_(4) dodecahedra in series for electrocatalytic reaction

作　　者：何静 赵箬澜 刘智博 于鹏 HE Jing;ZHAO Ruolan;LIU Zhibo;YU Peng(Key Laboratory for Photonic and Electronic Bandgap Materials,Ministry of Education,School of Physics and Electronic Engineering,Harbin Normal University,Harbin 150025,China)

机构地区：[1]哈尔滨师范大学物理与电子工程学院光电带隙材料教育部重点实验室,哈尔滨150025

出　　处：《黑龙江大学自然科学学报》2024年第2期185-190,共6页Journal of Natural Science of Heilongjiang University

基　　金：黑龙江省自然科学基金优秀青年项目(YQ2022B008);黑龙江省大学生创新创业训练计划项目(202110231068,S202210231010)。

摘　　要：钴基材料资源丰富且廉价,具有代替铂基催化剂的潜力。粉体催化剂的性能测试不可避免使用黏结剂,容易堆积掩埋活性位点,对于催化性能非常不利。在铜网上原位构筑串联有钴基十二面体的Co_(3)O_(4)/CuO_(NWs)分级结构自支撑电极,并考察了其在碱性体系中的析氢反应(Hydrogen evolution reaction,HER)和析氧反应(Oxygen evolution reaction,OER)性能。结果显示,对于HER反应,Co_(3)O_(4)/CuO_(NWs)材料仅需232 mV的过电势就能达到20 mA·cm^(-2)的电流密度,对于OER性能,Co_(3)O_(4)/CuO_(NWs)材料在电流密度为20 mA·cm^(-2)时有320 mV的过电位,优于商业Pt/C催化剂。此外,用此自支撑电极组装的锌-空气电池可以稳定循坏160 h,没有明显电压衰减。Cobalt-based materials with abundant source and inexpensive character hold great potential to replace platinum-based catalysts.However,the performance test of powder catalyst inevitably uses the binders,which are easy to accumulate and bury the active site,and then has a serious impact on the performance.Co_(3)O_(4)/CuO_(NWs) hierarchical self-supported electrode with Co-based dodecahedron in series was constructed on copper network.The hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)performance in alkaline system was investigated.The results show that for HER,Co_(3)O_(4)/CuO_(NWs) can reach a current density of 20 mA·cm^(-2) with an overpotential of 232 mV.For OER,Co_(3)O_(4)/CuO_(NWs) has an overpotential of 320 mV at a current density of 20 mA·cm^(-2),indicating that Co_(3)O_(4)/CuO_(NWs) displays better HER and OER performance than that of the commercial Pt/C catalyst.Moreover,the zinc-air battery assembled with the as-prepared electrode can be stablely cycled for 160 h without significant voltage change.

关 键 词：Co_(3)O_(4) 析氢反应 析氧反应 锌-空气电池 铜网 

分 类 号：O643.36[理学—物理化学]