摘要
通过简便水热反应-固相煅烧方法合成了一种新颖的Ni-N_(x)物种修饰介孔碳纳米管材料(命名为Ni-N_(x)|CNT).探究了煅烧温度对材料物相、形貌结构及析氢活性的影响,研究表明,当煅烧温度为800℃时获得样品的电催化析氢性能最佳.对其进行微观结构表征与表面化学态分析发现,得益于高含量的Ni-N_(x)活性物种,富含催化反应位点的介孔结构以及高导电性碳纳米管基底,Ni-N_(x)|CNT在宽pH范围内(pH 7~14)表现出优异的电催化析氢活性,在中性和碱性条件下获得10 mA/cm^(2)电流密度分别仅需189 mV和122 mV的析氢过电势,并且可以保持20 h和50 h的催化稳定性.
A novel Ni-N_(x)decorated mesoporous carbon nanotube(denoted as Ni-N_(x)|CNT)was successfully synthesized for hydrogen evolution reaction(HER)by a simple hydrothermal reaction combined calcination method.The influence of calcination temperature on the material phase,morphology and catalytic activity was investigated and results showed that Ni-N_(x)|CNT with the calcination temperature of 800℃exhibited the best HER activity.The microstructure characterization and surface chemical state analysis revealed that benefitting from high-content Ni-N_(x)species,mesoporous structure with abundant catalytic reaction sites and carbon nanotube with high electronic conductivity as the substrate,the optimal Ni-N_(x)|CNT showed excellent electrocatalytic hydrogen activity over a wide pH range(pH 7~14),requiring only 189 and 122 mV for driving the current density of 10 mA/cm^(2) under neutral and alkaline conditions,respectively,and maintaining catalytic stability for at least 20 and 50 h under such two conditions.
作者
冯亮亮
李东明
杜盈盈
黄剑锋
付常乐
FENG Liang-liang;LI Dong-ming;DU Ying-ying;HUANG Jian-feng;FU Chang-le(School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi′an 710021, China)
出处
《陕西科技大学学报》
北大核心
2022年第2期120-127,共8页
Journal of Shaanxi University of Science & Technology
基金
国家自然科学基金项目(22179074)
教育部轻化工助剂化学与技术重点实验室开放基金项目(KFKT2020-06)。
关键词
电催化剂
析氢反应
碳纳米管
Ni-N_(x)物种
介孔结构
electrocatalyst
hydrogen evolution reaction
carbon nanotube
Ni-N_(x)species
mesoporous strucuture
