文青波

博士生导师 硕士生导师

所在单位:粉末冶金研究院

学历:博士研究生毕业

办公地点:中南大学本部校区三一大楼617

性别:男

联系方式:wentsingbo@csu.edu.cn

学位:工学博士学位

在职信息:在职

毕业院校:达姆施塔特工业大学(德国)

学科:材料科学与工程

曾获荣誉:

2018-03-05  当选:  玛丽居里优秀研究计划奖

2011-05-31  当选:  桑德环境奖学金优秀论文特等奖

2010-11-30  当选:  湖南大学长江环境奖学金

2009-05-31  当选:  湖南省优秀大学毕业生

2008-11-30  当选:  国家奖学金

2007-11-30  当选:  国家奖学金

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Formation of Highly Active NiO(OH) Thin Films from Electrochemically Deposited Ni(OH)2 by a Simple Thermal Treatment at a Moderate Temperature: A Combined Electrochemical and Surface Science Investigation

发布时间:2022-01-12

点击次数:

影响因子:13.08

DOI码:10.1021/acscatal.1c04589

发表刊物:ACS Catalysis

关键字:nickel hydroxides electrocatalysis oxygen evolution reaction Raman spectroscopy X-ray photoelectron spectroscopy

摘要:Electrodeposited α-Ni(OH)2 thin films on Ti substrates were investigated as electrocatalysts for cost-effective water-splitting devices. A facile annealing of the α-Ni(OH)2 films at 150 °C for 1 h is of extreme importance to enhance their electrocatalytic activity for the oxygen evolution reaction (OER). Voltammetric analysis combined with X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and scanning electron microscopy (SEM) reveals that the induced structural evolution of the α-Ni(OH)2 results in a strong improvement of electrical conductivity, which is a crucial factor for the highly enhanced activity. Moreover, the annealing accelerates the generation of active sites, which can even be further improved easily via electrochemical galvanostatic conditioning. Thus, the α-Ni(OH)2 thin films exhibit an overpotential of 310 mV (at j = 10 mA cm–2) with a Tafel slope of 42.6 mV dec–1 in 1.0 M KOH, which is much better than that for a commercial RuO2/Ti electrode. The active component at the applied electrode potential of 10 mA cm–2 is characterized to be γ-Ni2.63O0.63(OH)1.37 showing an “apparent oxidation state” of +2.63 for the Ni. In addition, the annealed electrocatalyst exhibits only a negligible overpotential increase after 26 h of measurement. The overpotential even decreases to 292 mV in the first 3 h, demonstrating outstanding electrocatalytic activity and long-term stability.

合写作者:Wolfram Jaegermann

第一作者:Shasha Tao

论文类型:期刊论文

通讯作者:Qingbo Wen, Bernhard Kaiser

学科门类:工学

一级学科:材料科学与工程

文献类型:J

卷号:12

页面范围:1508-1519

是否译文:

发表时间:2022-01-11

收录刊物:SCI

发布期刊链接:https://pubs.acs.org/doi/full/10.1021/acscatal.1c04589

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