摘要
通过离子交换法,将Ru原子均匀负载于掺氮超薄碳化钼纳米片自组装的微米球表面,调节前驱体中钌的含量,从而调控了Ru-Mo_(x)C NFs中β-Mo_(2)C和α-MoC_(1-x)的比例,得到了具有优异性能的析氢催化剂Ru-Mo_(x)C NFs-4,由于混合晶相碳化钼具有更佳的氢吸附能和Ru与Mo_(2)C基底之间的协同作用,表现出了十分优异的析氢性能。Ru-Mo_(x)C NFs-4具有较低的过电位(η_(10)为49 mV和η_(100)为127 mV),Tafel斜率为51.3 mV·dec^(-1),同时还具有良好的耐久性。这项研究为通过掺杂金属调控碳化物相组成设计高效析氢催化剂提供了新的思路。
Ru atoms were uniformly loaded on the surface of self-assembled micrometer spheres of nitrogen-doped ultrathin molybdenum carbide nanosheets by ion-exchange method,and the ratio of β-Mo_(2)C andα-MoC_(1-x) in Ru-Mo_(x)C NFs was adjusted by adjusting the content of ruthenium in the precursors,Ru-Mo_(x)C NFs-4 catalyst with excellent hydrogen precipitation performance was obtained,which exhibited very good hydrogen precipitation performance due to the better hydrogen adsorption energy of the mixed crystalline phase molybdenum carbide and the synergistic effect between Ru and Mo_(2)C substrates.Ru-Mo_(x)C NFs-4 exhibited low overpotentials(η_(10)=49 mV and η_(100)=127 mV),a Tafel slope of 51.3 mV·dec^(-1),and good durability.This study provides a new idea for the design of efficient catalysts for hydrogen evolution reaction by tuning the carbide phase composition through doping with metals.
作者
张佳柱
孙永利
杨晓东
杨娜
姜斌
肖晓明
澹台晓伟
张吕鸿
ZHANG Jiazhu;SUN Yongli;YANG Xiaodong;YANG Na;JIANG Bin;XIAO Xiaoming;TANTAI Xiaowei;ZHANG Lvhong(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China)
出处
《化学工业与工程》
CSCD
北大核心
2024年第5期43-50,共8页
Chemical Industry and Engineering
基金
国家自然科学基金项目(22078233)
天津市海洋局科技项目(19-3BC2014-01)
关键词
碳化钼
制氢
电化学
钌
molybdenum carbide
hydrogen production
electrochemistry
ruthenium
