摘要
电催化分解水制氢(HER)被认为是最具应用前景的能量转换方式之一,可同时获得高纯度氢气并实现能量储存与转化,其关键在于低廉、高效且高稳定HER电催化剂的设计与开发。采用一步水热法得到羟基氧化镍/聚苯胺(NiOOH/PANI)催化剂前驱体,经800℃热解后制备出Ni-NiO/N-C负载型电催化剂,并考察其HER性能。采用XRD、SEM、TEM、BET、XPS和Raman等手段对催化剂的物理化学属性进行表征,结果表明催化剂主要呈现出均匀的碳纳米片状堆积结构,Ni和NiO同时存在且均匀分布在载体N-C表面。电化学性能测试结果表明该催化剂的催化性能与催化剂中金属Ni的相对含量密切相关,当前驱体中苯胺添加量为0.6 mL时,所得催化剂Ni-NiO/N-C-0.6上金属Ni相对含量最高,电催化性能最好,在电流密度为10 mA·cm^(−2)时过电位仅为168 mV,且连续工作16 h或经历1000次循环伏安测试后,催化活性基本不变,展现出优异的催化稳定性,具有广阔的应用前景。
The hydrogen production from hydrogen evolution reaction(HER)in electrochemical water splitting is considered to be one of the most promising energy conversion methods,which can simultaneously obtain high purity hydrogen and realize energy storage and conversion.The key depends on the development of HER electrocatalysts with high efficiency,high stability and low price.A series of NiOOH/polyaniline(NiOOH/PANI)catalyst precursors were prepared via one-pot hydrothermal method.After pyrolysis at 800°C,the Ni-NiO/N-C electrocatalysts were obtained and applied to HER.The XRD,SEM,TEM,BET,XPS and Raman spectroscopy were conducted to analyze the physical and chemical properties of the catalysts.Results show that the catalysts are present in the nanosheet morphology,the nickel and nickel oxide are coexisted and highly dispersed in the carbon support.The results of HER tests demonstrate that the catalytic performance is closely related with the content of nickel in the catalyst,and the Ni-NiO/N-C-0.6 catalyst with the aniline addition of 0.6 mL exhibits the best performance for HER,which has an overpotential of only 168 mV at a current density of 10 mA·cm^(−2).Besides,the catalyst also has good catalytic stability with almost no detectable activity decay after 16 h HER test or 1000 times of cyclic voltammetry measurements,demonstrating broad application prospects.
作者
吴诗德
张桂伟
黄思光
易峰
平丹
方少明
WU Shide;ZHANG Guiwei;HUANG Siguang;YI Feng;PING Dan;FANG Shaoming(School of Materials and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450001,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2022年第4期1667-1677,共11页
Acta Materiae Compositae Sinica
基金
郑州轻工业大学星空众创空间孵化项目(2020ZCKJ218)
河南省自然科学基金(212300410299)
国家自然科学基金-河南联合基金重点项目(U1704256)。
关键词
氢能
电解水
催化剂
镍
氧化镍
氮掺杂碳
hydrogen energy
electrochemical water splitting
catalyst
nickel
nickel oxide
nitrogen doped carbon
作者简介
通信作者:平丹,博士,讲师,硕士生导师,研究方向为电催化反应、复合功能材料。E-mail:danping@zzuli.edu.cn。
