The real-time investigation of the nickel-iron hydroxide catalyzed oxygen evolution reaction with interdigitated array electrodes

作     者：Liu, Fei Zhang, Jie Wu, Weiwei Zhang, Peng Ma, Xiaohua Tao, Keyu Wang, Tongtong Wang, Qi 

作者机构：Xidian Univ Interdisciplinary Res Ctr Smart Sensing Sch Adv Mat & Nanotechnol Xian 710126 Shaanxi Peoples R China Xi An Jiao Tong Univ State Key Lab Multiphase Flow Power Engn MFPE Int Res Ctr Renewable Energy IRCRE 28 West Xianning Rd Xian 710049 Peoples R China Xidian Univ Sch Microelect Xian 710126 Shaanxi Peoples R China 

出 版 物：《NANOTECHNOLOGY》 (纳米技术)

年 卷 期：2021年第32卷第37期

页      面：375706-375706页

核心收录：

学科分类：12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China China Postdoctoral Science Foundation [2017M613122] Fundamental Research Funds for the Central Universities [JB211410] Wuhu and Xidian University special fund for industry-university-research cooperation [XWYCXY-012020012] Open Fund of Zhijiang Lab [2021MC0AB02] 

主　　题：interdigitated array electrodes NiFe oxygen evolution reaction electrocatalysis in situ 

摘      要：Electrocatalysis of oxygen evolution reaction (OER), one of the most important members in clean and efficient energy conversion, requires increasing studies on reaction process analysis, catalyst investigation and evaluation and so on through in situ experiments. The bottleneck is the difficulties on clear and precise understanding towards the multi-step reactions with fast reaction rates. Interdigitated array (IDA) electrodes with sensitive responses on the generation, transfer and collection of reaction products are proposed and utilized as a convenient and effective tool to in situ monitor and characterize the reaction thermodynamics and kinetics information. Herein, nickel-iron hydroxide, a promising and novel OER catalyst, is chosen as the candidate to demonstrate the merit of IDA on studying the OER. With the generator-collector mode, the real-time oxygen evolution process is monitored precisely with the IDA collector, distinguished it from the general catalytic current which is normally recorded with conventional electrochemical method. In another word, the actual faradaic efficiency was observed experimentally with IDA electrodes, which is often misled as 100% in many works. The diffusion of the reaction products has been seen as well with the generator-collector mode. This general tool (IDA) may make more contributions on the study of reaction process of all electrocatalytical reactions.