第 50 卷第 3 期 | | Vol. 50 No. 3 | 2020 年 6 月 | Jun 2020 |
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所属栏目:功能材料
泡沫镍上原位合成硒化镍与电解水性能研究 |
杨海华,蒋令杰,阎建辉,张 丽*
(湖南理工学院 化学化工学院,湖南省先进碳基功能材料重点实验室,湖南 岳阳 414006) |
摘 要:过渡金属硒化物已被认为是一类极具发展前景的电解水催化剂。以泡沫镍为基底和镍源,通过一步水热法在泡沫镍上负载硒化镍制备电催化剂(记为Ni-Se@NF)。扫描电镜图表明,在泡沫镍表面原位生长合成了一层纳米颗粒;X射线衍射和X射线光电子能谱表征证明该层纳米颗粒为Ni0.85Se和Ni3Se2。在1 mol·L-1 KOH电解质中,对Ni-Se@NF电极进行了双催化电解水性能测试。Ni-Se@NF电极的析氢电流密度10 mA·cm-2时的超电势为153 mV,析氧电流密度50 mA·cm-2时的超电势为340 mV,并表现出良好的稳定性。 |
关键词:硒化镍;泡沫镍;电解水;析氢反应;析氧反应 |
中图分类号:O643 文献标识码:A 文章编号:1009-9212(2020)03-0047-05 |
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In Situ Synthesis of Nickel Selenide on Ni Foam for Electrocatalytic Water Splitting |
YANG Hai-hua, JIANG Ling-jie, YAN Jian-hui, ZHANG Li*
(Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials, School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China) |
Abstract:Transition metal selenides have attracted extensive attention as promising electrocatalysts for water splitting. Herein, the direct growth of nickel selenide on nickel foam (denoted as Ni-Se@NF) was demonstrated via a simple one-step hydrothermal approach. A film layer composed of nanoparticles was observed by scanning electron microscope, which was further demonstrated as Ni0.85Se and Ni3Se2 by X-ray diffraction and X-ray photoelectron spectroscopy. The as-obtained Ni-Se@NF was applied as electrodes for bifunctional water splitting in 1 mol·L-1 KOH, demanding a low overpotential of 153 mV to achieve the current density of 10 mA cm2 for HER, a small overpotential of 340 mV to achieve the current density of 50 mA·cm-2 for OER, as well as good stability. |
Key words:nickel selenide; nickel foam; electrocatalytic water splitting; hydrogen evolution reaction; oxygen evolution reaction |
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基金项目:湖南省自然科学基金项目(2019JJ50206),湖南省教育厅科学研究项目(19B230)。
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作者简介:杨海华(1983-),男,湖南隆回人,高级工程师,博士,研究方向:无机功能材料(E-mail:hhyang@126.com)。
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联 系 人:张 丽,教授,研究方向:无机功能材料(E-mail:hgx.zl@163.com)。
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收稿日期:2020-05-18
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