个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职:大连理工大学莱斯特国际学院副院长
性别:男
毕业院校:波鸿大学
学位:博士
所在单位:化工学院
学科:应用化学. 精细化工
办公地点:大连理工大学西部校区精细化工国家重点实验室E段521
联系方式:+86-411-84986487
电子邮箱:jinxuan.liu@dlut.edu.cn
Amorphous Ni(Fe)OxHy-coated nanocone arrays self-supported on stainless steel mesh as a promising oxygen-evolving anode for large scale water splitting
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论文类型:期刊论文
发表时间:2018-06-15
发表刊物:JOURNAL OF POWER SOURCES
收录刊物:SCIE、EI
卷号:389
页面范围:160-168
ISSN号:0378-7753
关键字:Electrolysis; Nanocone array; Ni(Fe) (oxy)hydroxide; Oxygen evolution reaction; Stainless steel mesh; Water oxidation
摘要:The development of highly efficient, robust, and cheap water oxidation electrodes is a major challenge in constructing industrially applicable electrolyzers for large-scale production of hydrogen from water. Herein we report a hierarchical stainless steel mesh electrode which features Ni(Fe)OxHy-coated self-supported nanocone arrays. Through a facile, mild, low-cost and readily scalable two-step fabrication procedure, the electrochemically active area of the optimized electrode is enlarged by a factor of 3.1 and the specific activity is enhanced by a factor of 250 at 265 mV overpotential compared with that of a corresponding pristine stainless steel mesh electrode. Moreover, the charge-transfer resistance is reduced from 4.47 Omega for the stainless steel mesh electrode to 0.13 Omega for the Ni(Fe)OxHy-coated nanocone array stainless steel mesh electrode. As a result, the cheap and easily fabricated electrode displays 280 and 303 mV low overpotentials to achieve high current densities of 500 and 1000 mA cm(geo)(-2), respectively, for oxygen evolution reaction in 1 M KOH. More importantly, the electrode exhibits a good stability over 340 h of chronopotentiometric test at 50 mA cm(geo)(-2) and only a slight attenuation (4.2%, similar to 15 mV) in catalytic activity over 82 h electrolysis at a constant current density of 500 mA cm(geo)(-2).