为了解决能源危机问题,探究具有高活性位点的电催化剂材料十分必要。可使用沸石咪唑啉框架(ZIF-67)为前驱体,通过吸收和热解制备同时掺有Co、Mo和S的多孔碳材料。合成的样品通过X射线衍射、扫描电镜、透射电镜和x射线光电子能谱等手段进行表征,利用电化学测试来研究其电催化性能。结果表明:与Co/NC和CoMo/NC相比,CoMoS/NC表现出更优异的电催化性能,在10mA/cm2时的过电位低为172mV,Tafel斜率为67.8mV/dec。CoMoS/NC也表现出良好的长期稳定性,Co、Mo和S可以作为HER反应过程中的活性位点,多孔碳结构促进了电荷的转移。多个活性位点和独特的结构确保了该材料CoMoS/NC的卓越性能。
In order to solve the problem of energy crisis,it is necessary to explore electrocatalyst materials with high active sites.Porous carbon materials doped with Co,Mo and S can be prepared by absorption and pyrolysis using zeolite imidazoline framework (ZIF-67) as precursor.The synthesized samples were characterized by XRD,SEM,TEM and XPS,and studied their electrocatalytic properties by electrochemical test.The results shown that CoMoS/nitrogen-rich porous carbon (NC) material had better electrocatalytic performance than Co/NC and CoMo/NC.The overpotential of CoMoS/NC was 172mV at 10mA/cm2,and the slope of Tafel was 67.8mV/dec.CoMoS/NC also showed good long-term stability,Co,Mo and S could be used as active sites in HER reaction process,and the porous carbon structure promoted charge transfer.The multiple active sites and unique structure ensured the CoMoS/NC material's excellent performance.
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基金资助
牡丹江师范学院省级培育项目(YB202101);牡丹江师范学院研究生科研创新重点项目(kjcx2020-23mdjnu)
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