不锈钢网上水热制备NiCo2O4/MoS2纳米复合结构及其在电解水制氢中的应用

doi:10.11900/0412.1961.2018.00001

金属学报

2018, Vol. 54

Issue (8): 1179-1186 DOI: 10.11900/0412.1961.2018.00001

本期目录 | 过刊浏览

不锈钢网上水热制备NiCo₂O₄/MoS₂纳米复合结构及其在电解水制氢中的应用

李丹^1,², 李杨^1,², 陈荣生^1,², 倪红卫^1,²(

)

1 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室武汉 430081
2 武汉科技大学省部共建耐火材料与冶金国家重点实验室武汉 430081

Direct Synthesis of NiCo₂O₄ Nanoneedles and MoS₂ Nanoflakes Grown on 316L Stainless Steel Meshes by Two Step Hydrothermal Method for HER

Dan LI^1,², Yang LI^1,², Rongsheng CHEN^1,², Hongwei NI^1,²(

)

1 Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China
2 State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China

引用本文:

李丹, 李杨, 陈荣生, 倪红卫. 不锈钢网上水热制备NiCo₂O₄/MoS₂纳米复合结构及其在电解水制氢中的应用[J]. 金属学报, 2018, 54(8): 1179-1186.
Dan LI, Yang LI, Rongsheng CHEN, Hongwei NI. Direct Synthesis of NiCo₂O₄ Nanoneedles and MoS₂ Nanoflakes Grown on 316L Stainless Steel Meshes by Two Step Hydrothermal Method for HER[J]. Acta Metall Sin, 2018, 54(8): 1179-1186.

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摘要:

在316L不锈钢网基底上利用水热法分别生长出MoS₂纳米片和NiCo₂O₄纳米针,用同样的方法在生长有MoS₂纳米片的不锈钢网上二次负载NiCo₂O₄纳米针制得了NiCo₂O₄/MoS₂复合结构。利用SEM、TEM及XRD等手段对复合结构的表面形貌和物相组成进行表征,通过电化学工作站测试材料的析氢性能。结果表明,NiCo₂O₄/MoS₂复合结构表现最佳,在析氢反应过程中起始过电位仅为65 mV,Tafel斜率为108 mV/dec,当电流密度达到100 mA/cm²时,过电位仅219.6 mV,且循环稳定性良好。

关键词 ： 316L不锈钢网, 水热法, 硫化钼, 钴酸镍, 析氢反应

Abstract：

The synthesis of nanostructures catalytic electrode for hydrogen evolution reaction (HER) plays an important role in national economy such as chlor-alkali industry, chemical power supply and fuel cell. Electro-splitting of water powered by electric energy has attracted extensive attention because this process can convert electric energy into chemical energy for easier storage and delivery. In this work, a facile and direct synthesis of NiCo₂O₄ nanoneedles and MoS₂ nanoflakes grown on 316L stainless steel meshes substrate by two step hydrothermal method was reported. Initially MoS₂ nanoflakes grown on the stainless steel (SS) meshes, and then NiCo₂O₄ nanoneedles were grown on MoS₂/SS meshes at optimum conditions using hydrothermal method. The prepared nanostructures were characterized by SEM, TEM and XRD. Then a three-electrode system was used to test the property of HER. The results show that the as-prepared electrode exhibits good catalytic behavior towards HER. The onset overpotential and Tafel slope are 65 mV and 108 mV/dec respectively. When the current density reaches 100 mA/cm², the overpotential is 219.6 mV. Furthermore, the composite structure exhibits good cycle stability in the same experimental conditions.

Key words： 316L stainless steel mesh hydrothermal molybdenum sulfide cobalt nickel oxide hydrogen evolution reaction (HER)

收稿日期: 2018-01-04

ZTFLH:

O646.5

基金资助:国家自然科学基金项目Nos.51471122和51604202

作者简介:

作者简介李丹,男,1993年生,硕士生

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https://www.ams.org.cn/CN/10.11900/0412.1961.2018.00001 或 https://www.ams.org.cn/CN/Y2018/V54/I8/1179

图1 生长在不锈钢网上的MoS2纳米片和NiCo2O4纳米针的SEM像

图2 不锈钢网上NiCo2O4/MoS2复合结构及MoS2负载NiCo2O4纳米针前后的SEM像

图3 生长在不锈钢网上的MoS2纳米片、NiCo2O4纳米针以及NiCo2O4/MoS2复合结构的XRD谱

图4 NiCo2O4/MoS2复合结构TEM像以及电子衍射图

图5 3种样品在1 mol/L NaOH溶液中的LSV曲线和相对应的Tafel斜率图、在开路电位下的Nyquist图及不锈钢网上NiCo2O4/MoS2复合电极在相同电解液中连扫1000 cyc前后的析氢极化曲线

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