摘要
设计高效非贵金属析氧反应(OER)电催化剂对电化学能量转换具有非常重要的意义.本文通过水热法和煅烧法,成功制备了铈(Ce)掺杂磷化镍(Ni_(2)P)纳米片催化剂Ce-Ni_(2)P.微量Ce掺杂使催化剂表面产生丰富的磷空位,并显著调控了催化剂表面的电子结构,优化了催化活性位的化学价态.得益于Ce掺杂对催化剂表面的电子结构调控,Ce-Ni_(2)P催化剂在碱性电解液中表现出优异的OER性能和长期的稳定性.在50和100 mA/cm^(2)电流密度下,Ce-Ni_(2)P的OER过电位分别为241和281 mV,显著优于Ni_(2)P和商用RuO _(2)的过电位.
The design and fabrication of efficient non-noble metal electrocatalysts for oxygen evolution reaction(OER)are of great significance for electrochemical energy conversion.Herein,the Ce-doped nickel phosphide nanosheet catalyst,Ce-Ni_(2)P,was successfully constructed via hydrothermal method and calcination method.The trace Ce-doping induced abundant phosphorus vacancies on the catalyst surface,which significantly adjusted the electronic structure of the catalyst surface and optimized the chemical valences of catalytic active sites.Benefiting from the electronic regulation of the catalyst surface induced by the Ce-doping,the Ce-Ni_(2)P catalyst exhibited the excellent OER performance and the long-term durability in alkaline electrolyte.At current densities of 50 and 100 mA/cm^(2),the OER overpotentials of Ce-Ni_(2)P were 241 and 281 mV,respectively,which were significantly superior to those of Ni_(2)P and commercial RuO_(2).
作者
马雪莹
李明
MA Xueying;LI Ming(College of Chemistry and Chemical Engineering,Southwest University,Chongqing 400715,China)
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2024年第1期188-195,共8页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金项目(91741105,21173169)
重庆市自然科学基金项目(cstc2018jcyjAX0625)
重庆市高等学校创新团队建设项目(CXTDX201601011).
