Pd/WS<sub>2</sub>二维复合材料的制备及电解水制氢性能研究

摘要首先通过锂离子插层制备了薄层WS₂纳米片，并采用软模板法在纳米片上负载了Pd纳米颗粒，得到Pd/WS₂复合材料。X射线衍射光谱（XRD）和透射电子显微镜（TEM）的结果表明Pd颗粒均匀地负载在了WS₂纳米片上。随后在H₂SO₄水溶液中对该复合材料进行电解水析氢性能测试，线性扫描伏安法（LSV）结果表明：复合材料的析氢起始电位为155 mV，塔菲尔斜率为121.79 mV·dec^-1，总体催化性能相比于单纯的WS₂纳米片和Pd金属颗粒有很大的改善，也优于当前商用的Pd/C催化剂。采用循环伏安法（CV）测试其稳定性，结果表明Pd/WS₂复合物电极具有优良的电催化析氢稳定性。

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	蔡迪
	朱远蹠
	翟婷婷
	周洲
	丁超颖
	范晓彬

关键词： Pd/WS₂纳米片；电解水；制氢

Abstract： Thin-Layer WS₂ nanosheets were obtained through a modified Li-intercalation method, followed by an In situ reduction of Pd nanoparticles to prepare the Pd/WS₂ composite. The XRD and TEM tests showed that uniform Pd nanoparticles were successfully deposited on the surfaces of layered WS₂ nanosheets. The HER performance of the Pd/WS₂ nanosheets composite was studied through the linear sweep voltammetry (LSV) method. The results showed the composite has an onset overpotential of 155 mV and a Tafel slope of 121.79 mV·dec^-1, which is much improved from the WS₂ nanosheets or Pd nanoparticles alone, and better than the commercial Pd/C catalyst as well. Cyclic voltammetry (CV) test showed after 1 000 cycles in acidic solution, the current density made little changes, which demonstrated the stability of the composite. In summary, we describe a simple method to obtain the Pd/WS₂ nanosheet composite. Further investigations show an improved HER catalytic activity with excellent stability, which indicates a promising application in the HER industry.

Keywords： Pd/WS₂ nanosheets； water electrolysis； hydrogen evolution

Received 2017-04-20;

Corresponding Authors: 范晓彬,E-mail:xiaobinfan@tju.edu.cn。 Email: xiaobinfan@tju.edu.cn

About author: 蔡迪(1991-),男,硕士研究生,现从事二维材料光电催化制氢方面的研究。

引用本文:

蔡迪, 朱远蹠, 翟婷婷, 周洲, 丁超颖, 范晓彬.Pd/WS₂二维复合材料的制备及电解水制氢性能研究[J]. 化学工业与工程, 2019,36(2): 48-52

Cai Di, Zhu Yuanzhi, Zhai Tingting, Zhou Zhou, Ding Chaoying, Fan Xiaobin.Enhanced Water Electrolysis by Pd/WS₂ Nanosheets Composite[J]. Chemcial Industry and Engineering, 2019,36(2): 48-52

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