摘要
研究镍电极在碱液中的析氢机理对开发二次清洁能源有指导意义,过去对其研究不够。通过Tafel曲线和电化学阻抗谱对镍电极在KOH溶液中的析氢机理进行了研究。结果表明,过电位低于600mV时,析氢服从复合脱附机理,反应历程为电化学步骤+复合脱附步骤;过电位高于600mV时,析氢服从迟缓放电机理或电化学脱附机理,反应历程为电化学步骤+电化学脱附步骤。
In view of the importance of studying the hydrogen evolution mechanism of Ni electrode in alkaline solution to the development of secondary clean energy,the hydrogen evolution mechanism of Ni electrode in KOH solution was studied by measuring Tafel curves and electrochemical impedance spectra.It was found that at an over-potential of below 600 mV,the hydrogen evolution reaction conformed to the composite desorption mechanism,and the reaction process consisted of an electrochemical step and a composite desorption step.When the over-potential was above 600 mV,the hydrogen evolution reaction conformed to the slow discharge mechanism or electrochemical desorption mechanism,and the reaction process consisted of an electrochemical step and an electrochemical desorption step.
出处
《材料保护》
CAS
CSCD
北大核心
2010年第12期1-3,共3页
Materials Protection
关键词
镍电极
析氢机理
碱液
反应历程
nickel electrode
hydrogen evolution mechanism
alkaline solution
reaction process
