摘要
针对目前MoS2作为析氢催化剂时存在的活性位点数目少且材料导电性能差等问题,文中通过液相超声剥离法以及离心处理制备得到MoS2/PVP分散液。PVP的辅助剥离作用使得剥离得到的MoS2纳米片尺寸大幅减小,提高了MoS2催化析氢活性位点的丰度;MoS2在PVP辅助剥离过程中发生了2H相到1T相的转变,同样增强了催化析氢活性。文中选用含有导电铜层的PI基片作为电极基底,利用喷墨印刷技术将MoS2/PVP催化剂固载于导电基底上制得催化析氢电极。该电极在10 mA·cm-2处的过电位为77 mV,Tafel斜率为65 mV·dec-1,这一结果表明该催化电极具有高催化活性。
In view of the current problem of low number of active sites and poor conductivity of materials when MoS2 is used as a hydrogen evolution catalyst,MoS2/PVP composite catalyst was prepared by liquid-phase ultrasonic stripping method and centrifugal treatment in this study.PVP increased the concentration of MoS2 in the dispersion and increased the amount of catalytic active sites.2H phase to 1T phase transition occurred during the process,which enhanced the catalytic activity.The PI substrate containing the conductive copper layer was selected as the electrode substrate,which improved the transmission efficiency of electrons between the catalyst and the electrode.The MoS 2/PVP composite catalyst was immobilized on the surface of the PI-based electrode by inkjet printing technology to prepare a catalytic hydrogen evolution electrode with an overpotential of 77 mV at 10 mA·cm-2 and a Tafel slope of 65 mV·dec-1.The above results indicated that the MoS2/PVP catalytic electrode had excellent catalytic activity.
作者
李培真
陈龙
LI Peizhen;CHEN Long(School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 610054,China)
出处
《电子科技》
2020年第6期74-78,共5页
Electronic Science and Technology
基金
四川省科技计划(2018HH0152)。
