| 钨掺杂的铁镍基层状氢氧化物用于电催化析氧和析氢反应 |
| Tungsten Doped Iron-Nickel Layered Hydroxide for Oxygen Evolution and Hydrogen Evolution Reaction |
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| 摘要: 采用简便的一步水热合成法，在泡沫镍上原位生长微量W6+掺入的Fe0.2Ni（OH）2双金属层状氢氧化物（LDH），以此来降低铁镍材料的过电势。通过场发射扫描电子显微镜（FESEM）、X射线衍射（XRD）、X射线光电子能谱（XPS）和拉曼光谱（Raman）等分析方法对材料形貌、组成、结构等进行表征，发现钨掺杂使催化剂材料的晶体结构和电子结构发生变化，W0.03Fe0.2Ni（OH）2 LDH表现出优异的电化学析氧（OER）和析氢（HER）性能。电化学测试表明该催化剂在25 mA·cm-2电流密度下OER和HER过电势分别仅有271和208 mV，塔菲尔斜率分别为61和181 mV·dec-1。此外，经过长达20 h计时电位稳定性测试后，材料的催化性能未见明显下降。 |
| 关键词: 钨掺杂 层状双金属氢氧化物 电催化 析氧反应 析氢反应 |
| 基金项目: 国家自然科学基金（No.U1808210）资助项目。 |
| Abstract: We utilize a simple one-step hydrothermal synthesis method to introduce trace amount of W6+ into Fe0.02Ni(OH)2 LDH, which grow on nickel foam in situ. The morphology, composition and structure of W0.03Fe0.2Ni(OH)2 LDH were characterized by means of field emission scanning electron microscope (FESEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectra, and so on. W0.03Fe0.2Ni(OH)2 LDH exhibited better electrochemical performance than others due to W6+ introduction. Electrochemical tests show that the lowest overpotentials for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) at the 25 mA·cm-2 were only 271 and 208 mV, respectively. The corresponding Tafel slopes were 61 and 181 mV·dec-1. In addition, there were no obvious decrease of electrocatalytic activity after more than 20-hours of chronopotentiometric test. |
| Keywords: tungsten doping layered double hydroxide electrocatalysis oxygen evolution reaction (OER) hydrogen evolution reaction (HER) |
| 投稿时间：2020-02-20 修订日期：2020-05-01 |
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| 李春,田朋,庞洪昌,叶俊伟,宁桂玲.钨掺杂的铁镍基层状氢氧化物用于电催化析氧和析氢反应[J].无机化学学报,2020,36(8):1492-1498. |
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