高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (12): 20230347.doi: 10.7503/cjcu20230347

• 物理化学 • 上一篇    下一篇

偶氮四唑钾盐的绿色电合成反应耦合WS2纳米片催化电解水制氢

姚田浩, 马语和, 柳博龙, 马玉强, 张聪, 李嘉辰(), 马海霞()   

  1. 西安市特种能源材料重点实验室, 西北大学化工学院, 西安 710069
  • 收稿日期:2023-07-29 出版日期:2023-12-10 发布日期:2023-09-05
  • 通讯作者: 马海霞 E-mail:lijiachen@nwu.edu.cn;mahx@nwu.edu.cn
  • 作者简介:李嘉辰, 男, 博士, 副教授, 主要从事电催化水分解制氢催化剂、 含能材料催化剂方面的研究. E-mail: lijiachen@nwu.edu.cn
  • 基金资助:
    陕西省科学技术厅重点科技创新团队(2022TD-33);国家大学生创新创业培训计划项目(202210697101)

Green Electrosynthesis Reaction of Potassium Azotetrazolium Salt Coupled by Hydrogen Production from Water Electrolysis by WS2 Nano Sheets

YAO Tianhao, MA Yuhe, LIU Bolong, MA Yuqiang, ZHANG Cong, LI Jiachen(), MA Haixia()   

  1. Xi’an Key Laboratory of Special Energy Materials,School of Chemical Engineering,Northwest University,Xi’an 710069,China
  • Received:2023-07-29 Online:2023-12-10 Published:2023-09-05
  • Contact: MA Haixia E-mail:lijiachen@nwu.edu.cn;mahx@nwu.edu.cn
  • Supported by:
    the Key Science and Technology Innovation Team of Shaanxi Provincial Science and Technology Department, China(2022TD-33);the National Innovation and Entrepreneurship Training Program for College Students, China(202210697101)

摘要:

析氧反应(OER)作为动力学缓慢的四电子多步骤反应过程, 限制了电催化水分解制氢的反应速率, 降低了电催化水分解制氢的整体效率, 以热力学更有利的有机含能材料氧化反应替代OER与析氢反应(HER)耦合, 在降低槽压制得氢气的同时能得到高附加值的化工产品. 本文建立了一种新的耦合体系, 在阳极侧制备含能离子盐[偶氮四唑钾盐(K2AZT)]的同时, 阴极侧以碳布负载的二硫化钨纳米片(CC@WS2 NSs)作为HER催化剂促进H2的形成. 该体系仅需要1.65 V的槽电压即可达到10 mA/cm 2的电流密度, 相比于CC@WS2 NSs/CF全解水体系(1.87 V)降低了220 mV. 耦合体系在至少15 h内保持平稳运行, 表现出优异的稳定性能. 通过绿色安全的电化学法制备含能化合物避免了传统有机合成方法高能耗、 高风险和高成本等问题, 为安全生产含能材料提供了新的合成策略.

关键词: 制氢, 绿色电合成, 含能材料, 过渡金属硫化物, 耦合体系

Abstract:

As a four-electron multi-step reaction process with sluggish kinetics, oxygen evolution reaction(OER) limits the reaction rate and reduces the overall efficiency of overall water splitting. Replacing OER with the oxidation reaction of thermodynamically more favorable organic energetic materials and coupling with hydrogen evolution reaction(HER), so that the high value-added chemical products can be obtained while reducing the overall cell voltage to generate hydrogen. In this paper, a novel coupling system was proposed, in which the energy-containing ionic salt, potassium azotetrazolium salt(K2AZT), was prepared on the anode side, and carbon cloth-supported tungsten disulfide nanosheets(CC@WS2 NSs) were used as HER catalyst to promote the HER on the cathode side. The system only requires a cell voltage of 1.65 V to achieve a current density of 10 mA/cm 2, which is 220 mV lower than that of conventional electrolyzed water(1.87 V). In addition, the coupled system maintained smooth operation for at least 15 h, showing excellent stability. At the same time, the preparation of energetic compounds by green and safe electrochemical method avoids the problems of high energy consumption, high risk and high cost of traditional organic synthesis method, and provides a new synthesis strategy for the safe production of energetic materials.

Key words: Hydrogen production, Green electrosynthesis, Energetic material, Transition metal sulfide, Coupling system

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