水热法合成MoS2/RGO的复合物及其电催化析氢性能研究

doi:10.3969/j.issn.2095-2198.2022.06.008

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摘要

以石墨烯、钼酸铵和硫脲为原料，通过控制质量配比，采用水热法合成了具有不同质量比的二硫化钼/还原氧化石墨烯（MoS₂/RGO）复合材料.采用X射线衍射、拉曼光谱、扫描电子显微镜以及透射电子显微镜对该复合材料的结构和形貌进行了表征，结果发现MoS₂/RGO质量比为1∶2时，形成的层间化合物分散良好，且MoS₂锚定在RGO表面，形成异质结构.通过电化学测试对MoS₂/RGO电催化析氢性能进行了研究，发现HER过程可能是由Volmer-Heyrovsky机制发生的，先是快速放电过程，然后是电化学脱附过程.原料MoS₂/RGO质量比为1∶2时，具有较小的Tafel斜率（32 mV/dec）、较低的过电位（145 mV）和良好的化学稳定性.

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关键词: 石墨烯')" href="#">

石墨烯二硫化钼原位水热合成复合材料电化学性能

Abstract:

Molybdenum disulfide/reduced graphene oxideMoS₂/RGO) composites with different mass ratios were synthesized by hydrothermal method with reduced graphene oxide，ammonium molybdate and thiourea as raw materials.The structure and morphology of the composites were characterized by X-ray diffraction(XRD)，Raman spectroscopy(Raman)，scanning electron microscopy(SEM) and transmission electron microscopy(TEM).The results showed that when the mass ratio of MoS₂/RGO was 1∶2，the interlayer compound formed was well dispersed，and MoS₂ was anchored on the surface of RGO to form a heterostructure.The electrocatalytic hydrogen evolution performance of MoS₂/RGO was studied by electrochemical test.It was found that the HER process may be caused by the Volmer-Heyrovsky mechanism，which is first a rapid discharge process and then by the electrochemical desorption process.The electrochemical test results show that MoS₂/RGO has a smaller Tafel slope(32 mV/dec)，lower overpotential (η₁₀=145 mV/dec) and good chemical stability，when the mass ratio of MoS₂/RGO is 1∶2.

Key words: graphene')" href="#">

graphene molybdenum disulfide in-situ hydrothermal synthesis composite material electrochemical performance

出版日期: 2022-12-31 发布日期: 2024-06-06 整期出版日期: 2022-12-31

ZTFLH:

O613.51

基金资助:

辽宁省自然基金（2019-ZD-0084，XXLJ2019008）

作者简介: 王连（1995—），女，辽宁鞍山人，硕士研究生在读，主要从事电化学析氢研究.

引用本文:

王连, 袁钊, 张小伏, 吴兆才, 郭卓.

水热法合成MoS₂/RGO的复合物及其电催化析氢性能研究 [J]. 沈阳化工大学学报, 2022, 36(6): 519-526.
WANG Lian, YUAN Zhao, ZHANG Xiao-fu, WU Zhao-cai, GUO Zhuo.

Hydrothermal Synthesis of Molybdenum Disulfide/Graphene Composites and Their Electrocatalytic Proporties for Hydrogen Evolution . Journal of Shenyang University of Chemical Technology, 2022, 36(6): 519-526.

链接本文:

https://xuebao.syuct.edu.cn/CN/10.3969/j.issn.2095-2198.2022.06.008 或 https://xuebao.syuct.edu.cn/CN/Y2022/V36/I6/519

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