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首页> 中文期刊> 《物理学报》 >室温合成非晶三硫化钼析氢催化剂的性能调制及其在串联制氢器件中的应用∗

室温合成非晶三硫化钼析氢催化剂的性能调制及其在串联制氢器件中的应用∗

         
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摘要

Highly-catalytic, cost-effective, well process-compatible, and highly-stable hydrogen-evolving catalysts are increas-ingly becoming key catalysts in realizing monolithic electrochemical solar water-splitting devices. However, the typical noble metallic catalysts seriously restrict the industrialization of electrochemical solar water-splitting devices on account of their poor storages and high costs. Low-cost, high-catalytic and non-metallic catalysts pave the promising way for the industrialization process. Molybdenum sulfide has emerged as a type of potential catalyst with high-activity and stability for the hydrogen-evolving reaction (HER) in the acidic condition, nowadays gradually becoming a research hotspot in solar-water-splitting. The process preparation of high-efficient molybdenum sulfide catalyst is consequently extremely important for enhancing the solar-to-hydrogen efficiency. In this paper, we synthesize highly-catalytic, low-cost, and highly-compatible non-metallic amorphous molybdenum trisulfide catalyst based on a simple wet chemical approach at room temperature for hydrogen-evolving reaction, followed by extensive studies of the effects of the mass loading of catalyst on the catalytic capacity and the solar-to-hydrogen performance of solar-water-splitting devices in series. When the mass loading is 0.5 mg·cm−2, the MoS3 catalyst exhibits the promising HER activity. the surface of catalyst appears to be rough, porous, nano-sized architecture and the thickness is around 2.0 µm, which simultaneously enlarges the elec-trochemically active area and reduces charge transfer impedance, accelerating the electron transport to electrochemically active site and improving the interfacial charge transfer. Besides, the HER catalytic activity is illustrated in a wired solar-water-splitting device. The current density can achieve the maximum values of 7.51 and 3.28 mA/cm2 correspond-ing to 0 and 0.8 V vs. RHE, and the onset potential is 1.83 V, comparable to the open circuit voltage (1.90 V) of two amorphous silcon cells in series. Therefore, we conclude that for amorphous molybdenum trisulfide catalyst there exists an optimized mass loading, with which an optimized catalytic capacity (260 mV vs. RHE at 10 mA/cm2 and tafel slope of 68 mV/dec) can be achieved. Further, by using the catalyst as a cathode for the solar-water-splitting devices in series, the catalyst can efficiently reduce the overpotential and improve the current output for the device, thereby potentially achieving a higher solar-to-hydrogen efficiency.

著录项

  • 来源
    《物理学报》 |2016年第11期|118801-1-118801-7|共7页
  • 作者

    晋中华; 刘伯飞; 梁俊辉; 王宁; 张奇星; 刘彩池; 赵颖; 张晓丹;

  • 作者单位

    河北工业大学材料科学与工程学院;

    天津 300130;

    南开大学光电子薄膜器件与技术研究所;

    光电子薄膜器件与技术天津市重点实验室;

    光电信息技术科学教育部重点实验室;

    天津300071;

    南开大学光电子薄膜器件与技术研究所;

    光电子薄膜器件与技术天津市重点实验室;

    光电信息技术科学教育部重点实验室;

    天津300071;

    南开大学光电子薄膜器件与技术研究所;

    光电子薄膜器件与技术天津市重点实验室;

    光电信息技术科学教育部重点实验室;

    天津300071;

    南开大学光电子薄膜器件与技术研究所;

    光电子薄膜器件与技术天津市重点实验室;

    光电信息技术科学教育部重点实验室;

    天津300071;

    南开大学光电子薄膜器件与技术研究所;

    光电子薄膜器件与技术天津市重点实验室;

    光电信息技术科学教育部重点实验室;

    天津300071;

    河北工业大学材料科学与工程学院;

    天津 300130;

    南开大学光电子薄膜器件与技术研究所;

    光电子薄膜器件与技术天津市重点实验室;

    光电信息技术科学教育部重点实验室;

    天津300071;

    南开大学光电子薄膜器件与技术研究所;

    光电子薄膜器件与技术天津市重点实验室;

    光电信息技术科学教育部重点实验室;

    天津300071;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类
  • 关键词

    催化剂; 三硫化钼; 滴涂量; 催化活性;

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