摘要
电解水是一项有前景的大规模生产绿色氢能的技术。然而由于析氧反应(OER)的内在动力学缓慢,阻碍了这种能量转换技术的发展。这就需要高活性且稳定的电催化剂。因此本文采用简单的两步水热合成法在钛网上构筑了具有自支撑的异质结构Co_(3)O_(4)/MoS_(2)。所制备的Co_(3)O_(4)/MoS_(2)异质结催化剂在1 M KOH溶液中具有优异的OER催化性能,当电流密度达到10 mA·cm-2时,所需过电势为306 mV,相应的塔菲尔(Tafel)斜率为51 mV dec-1。催化剂表现出优异的OER催化活性源于异质结构以及Co_(3)O_(4)和MoS_(2)的协同作用。本工作为合理设计高效、低廉的复合型催化剂提供了有效的策略。
It is a promising technology of large-scale production of green hydrogen energy to electrolyze water by renewable electric energy.However,the slow internal kinetics of oxygen evolution reaction(OER)hinders the application of this energy conversion technology,which requires high active and stable electrocatalysts.Herein,a facile two-step hydrothermal synthesis method is employed to fabricate self-supporting heterostructure Co_(3)O_(4)/MoS_(2) on titanium mesh in this project.The as-prepared catalyst has excellent OER catalytic performance in 1M KOH solution,that is,the electrode delivers 10 mA/cm^(2) at overpotential 306 mV and the corresponding Tafel slope is 51 mV/dec.The excellent OER activity of the catalyst is attributed to the heterostructure and the synergistic effect of Co_(3)O_(4) and MoS_(2).The project provides a novel and effective strategy for the rational design of high-efficiency and low-cost composite catalyst.
作者
卫学玲
包维维
蒋鹏
艾桃桃
李文虎
邹祥宇
WEI Xueling;BAO Weiwei;JIANG Peng;AI Taotao;LI Wenhu;ZOU Xiangyu(School of Material Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China)
出处
《功能材料》
CAS
CSCD
北大核心
2021年第9期9191-9195,共5页
Journal of Functional Materials
基金
国家自然科学青年基金资助项目(51504147)
陕西理工大学校级资助项目(SLGKY2007)。
作者简介
卫学玲(1980—),女,辽宁营口人,硕士研究生,工程师,从事功能材料制备及研究;通讯作者:邹祥宇,E-mail:zou800403@foxmail.com。
