纳米多孔Co的磷化物制备及其电催化析氢性能

兰州理工大学学报 ›› 2022, Vol. 48 ›› Issue (3): 1-6.

• 材料科学与工程 • 下一篇

纳米多孔Co的磷化物制备及其电催化析氢性能

李常锋¹, 周琦^*2,3, 王登辉³, 林文斌³

1.兰州新区职教园区服务保障中心, 甘肃兰州 730087;
2.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050;
3.兰州理工大学材料科学与工程学院, 甘肃兰州 730050

收稿日期:2019-07-09 出版日期:2022-06-28 发布日期:2022-10-09
通讯作者: 周琦(1963-),女,湖南长沙人,教授.Email:zhouxq301@sina.com
基金资助:
国家自然科学基金(51661018)

Preparation of nanoporous Co phosphide and its electrocatalytic performance for hydrogen evolution

LI Chang-feng¹, ZHOU Qi^2,3, WANG Deng-hui³, LIN Wen-bin³

1. Lanzhou New District Vocational Education Service & Support Center, Lanzhou 730087, China;
2. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China;
3. College of Materials Science and Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2019-07-09 Online:2022-06-28 Published:2022-10-09

摘要/Abstract

摘要： 采用脱合金化、水热合成和化学气相沉积制备纳米多孔Co、NiCo(OH)₂/Co和NiCo(OH)₂-P复合电极. 通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)等方法表征电极材料的物相和形貌结构. 在1 mol·L^－1的KOH溶液中,运用线性扫描伏安曲线(LSV)、交流阻抗谱(EIS)、循环伏安曲线(CV)等测试电极的电催化析氢性能. 结果表明:纳米多孔Co、NiCo(OH)₂/Co、NiCo(OH)₂-P电极材料的析氢性能依次增加,化学气相沉积(CVD)磷化后的纳米多孔NiCo(OH)₂-P在10 mA·cm^－2电流密度下,其过电位为139 mV,Tafel斜率为123.57 mV·dec^－1,双电层电容为30.16 mF·cm^－2. 经过1 000圈循环伏安耐久性实验后,纳米多孔NiCo(OH)₂-P电极在10 mA·cm^－2电流密度下,析氢过电位仅相差7 mV,表现出良好的析氢稳定性.

关键词: 快速凝固, 脱合金, 水热合成, 化学气相沉积, Co基磷化物

Abstract: Nanoporous Co, NiCo(OH)₂/Co and NiCo(OH)₂-P composite electrodes were prepared by Dealloying, Hydrothermal synthesis and Chemical vapor deposition. The phase, morphology and structure of the electrode were characterized by the X-ray diffractometer (XRD) and scanning electron microscope(SEM). In 1 mol·L^－1KOH solution, the electrocatalytic hydrogen evolution properties of the electrode were measured by the linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The results show that the properties of nanoporous Co, NiCo(OH)₂/Co, NiCo(OH)₂-P electrode materials increase in turn. The overpotential of nanoporous NiCo(OH)₂-P after chemical vapor deposition(CVD)phosphorization is 139 mV at 10 mA·cm^－2 current density, and Tafel slope is 123.57 mV·dec^－1, the double layer capacitance is 30.16 mF·cm^－2. After 1 000 cycles of cyclic voltammetry, nanoporous NiCo(OH)₂-P electrode show excellent hydrogen evolution reaction (HER) stability with only 7 mV change of hydrogen evolution overpotential at 10 mA·cm^－2 current density.

Key words: rapid solidification, dealloying, hydrothermal synthesis, chemical vapor deposition, Co-based phosphate

中图分类号:

TG146.1

李常锋, 周琦, 王登辉, 林文斌. 纳米多孔Co的磷化物制备及其电催化析氢性能[J]. 兰州理工大学学报, 2022, 48(3): 1-6.

LI Chang-feng, ZHOU Qi, WANG Deng-hui, LIN Wen-bin. Preparation of nanoporous Co phosphide and its electrocatalytic performance for hydrogen evolution[J]. Journal of Lanzhou University of Technology, 2022, 48(3): 1-6.

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纳米多孔Co的磷化物制备及其电催化析氢性能

Preparation of nanoporous Co phosphide and its electrocatalytic performance for hydrogen evolution

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