摘要
通过无水氯化钴和硼氢化钠固相反应制备纳米晶CoB粉末,系统研究微观结构及电催化析氧性能。研究表明,纳米晶CoB粉末在1.0 mol/L KOH碱性环境中,电流密度为10 mA·cm^(-2)时,过电位为280 mV,Tafel斜率为75.89 mV dec^(-1),该值优于商业RuO_(2)的过电位323 mV和Tafel斜率108.09 mV dec^(-1),表明纳米晶CoB粉末具有良好的析氧活性。该电催化剂具有良好的稳定性和循环耐久性。
The search for highly active,chemically stable and inexpensive non⁃precious⁃metal oxygen evolution catalysts is a key step towards the realization for applications of electrocatalytic hydrogen evolution.Nanocrystalline transition metal borides have been paid great attention because of their good electrical conductivity,stable structure and high chemical stability.In the paper,nanocrystalline CoB powder was successfully prepared through solid⁃phase reaction of anhydrous cobalt chloride and sodium borohydride and the microstructure of the nanocrystalline and their electrocatalytic performance for oxygen evolution was systematically investigated.The results showed that the nanocrystalline CoB powder exhibited an overpotential of 280 mV and a Tafel slope of 75.89 mV dec^(-1)at a current density of 10 mA cm^(-2)in an alkaline environment of 1.0 mol/L KOH,which were superior to the overpotential of 323 mV and the Tafel slope of 108.09 mV dec^(-1)of the commercial RuO_(2),indicating that the nanocrystalline CoB possessed a good oxygen precipitating activity.Moreover,the electrocatalyst presented good stability and cycling durability.The research provided a new idea and a new material for the development of efficient cobalt boride nanocrystalline electrocatalysts for oxygen evolution reaction(OER).
作者
高宇欣
王浩
苗琪
赵凤岐
包黎红
GAO Yuxin;WANG Hao;MIAO Qi;ZHAO Fengqi;BAO Lihong(College of Physics and Electronic Information,Inner Mongolia Normal University,Hohhot 010022,China;Inner Mongolia Key Laboratory for Physics and Chemistry of Functional Materials,Hohhot 010022,China)
出处
《内蒙古师范大学学报（自然科学版）》
CAS
2024年第2期191-196,共6页
Journal of Inner Mongolia Normal University(Natural Science Edition)
基金
内蒙古师范大学研究生科研创新基金资助项目“纳米Ni1-xFexB电催化材料制备及析氢性能研究”(CXJJS22103)
内蒙古师范大学重大培育专项资助项目“钇基纳米稀土硼化物Y1-xRxB6(R=Eu,Ba)光吸收机理研究”(2020ZD01)
内蒙古师范大学基本科研业务费专项基金资助项目“新能源过渡金属硼化物MoB2基复合材料微观结构调控对电催化产氢增强机理研究”(2022JBBJ010)。
关键词
电催化制氢
析氧反应
纳米晶CoB
electrocatalytic water splitting
oxygen evolution reaction
CoB
