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
发布时间：2019-06-22 16:32
【摘要】：高催化活性、低成本、良好工艺兼容性以及高稳定性的析氢催化剂是实现一体化光电化学水解制氢器件的关键,然而传统的贵金属催化剂由于储量稀缺、成本高昂而严重限制了光电化学水解制氢器件的产业化进程.本文在室温下通过湿法化学合成法制备了高催化活性、成本低廉以及工艺兼容性好的非金属非晶三硫化钼析氢催化剂,并研究了不同催化剂滴涂量对其催化活性以及串联制氢器件制氢性能的影响.结果表明,存在最优化非晶三硫化钼催化剂滴涂量以获得最佳催化活性(10 m A/cm~2电流密度对应电势达260 mV vs.RHE(可逆氢电极),塔菲尔斜率达68 mV/dec),其粗糙表面以及多孔结构可获得更大的电化学接触面积以促进析氢反应.进一步将其作为光阴极应用于串联制氢器件,可有效降低过电势损失和提高光生电流密度输出,与光阳极结合有望提高制氢效率.
[Abstract]:High catalytic activity, low cost, good process compatibility and high stability of hydrogen evolution catalysts are the key to the realization of integrated photochemical hydrolysis hydrogen production devices. However, the traditional precious metal catalysts have limited the industrialization process of photochemical hydrolysis hydrogen production devices because of their scarce reserves and high cost. In this paper, non-metallic amorphous Mo trisulfide hydrogen evolution catalysts with high catalytic activity, low cost and good process compatibility were prepared by wet chemical synthesis at room temperature. The effects of different catalyst droplets on their catalytic activity and hydrogen production performance of series hydrogen production devices were studied. The results show that there is an optimal amount of amorphous Mo trisulfide catalyst to obtain the optimum catalytic activity (the corresponding potential of 10 m A/cm~2 current density is 260 mV vs.RHE (reversible hydrogen electrode) and the Tafel slope is 68 mV/dec). The rough surface and porous structure of the catalyst can obtain larger electrochemical contact area to promote hydrogen evolution reaction. Furthermore, its application as photocathode in series hydrogen production devices can effectively reduce the loss of overpotential and increase the output of photogenerated current density. the combination of photocathode and photoanode is expected to improve the efficiency of hydrogen production.
【作者单位】： 河北工业大学材料科学与工程学院;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;
【基金】：科技部国际合作项目(批准号:2014DFE60170) 高等学校博士学科点专项科研基金(批准号:20120031110039)资助的课题~~
【分类号】：O643.36
本文编号：2504769
[Abstract]:High catalytic activity, low cost, good process compatibility and high stability of hydrogen evolution catalysts are the key to the realization of integrated photochemical hydrolysis hydrogen production devices. However, the traditional precious metal catalysts have limited the industrialization process of photochemical hydrolysis hydrogen production devices because of their scarce reserves and high cost. In this paper, non-metallic amorphous Mo trisulfide hydrogen evolution catalysts with high catalytic activity, low cost and good process compatibility were prepared by wet chemical synthesis at room temperature. The effects of different catalyst droplets on their catalytic activity and hydrogen production performance of series hydrogen production devices were studied. The results show that there is an optimal amount of amorphous Mo trisulfide catalyst to obtain the optimum catalytic activity (the corresponding potential of 10 m A/cm~2 current density is 260 mV vs.RHE (reversible hydrogen electrode) and the Tafel slope is 68 mV/dec). The rough surface and porous structure of the catalyst can obtain larger electrochemical contact area to promote hydrogen evolution reaction. Furthermore, its application as photocathode in series hydrogen production devices can effectively reduce the loss of overpotential and increase the output of photogenerated current density. the combination of photocathode and photoanode is expected to improve the efficiency of hydrogen production.
【作者单位】： 河北工业大学材料科学与工程学院;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;
【基金】：科技部国际合作项目(批准号:2014DFE60170) 高等学校博士学科点专项科研基金(批准号:20120031110039)资助的课题~~
【分类号】：O643.36
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