电池电极反应的新应用:分步法电解制氢气 |
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引用本文: | 马元元,郭昭薇,王永刚,夏永姚. 电池电极反应的新应用:分步法电解制氢气[J]. 电化学, 2018, 24(5): 444. DOI: 10.13208/j.electrochem.180143 |
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作者姓名: | 马元元 郭昭薇 王永刚 夏永姚 |
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作者单位: | 复旦大学化学系,上海市分子催化和功能材料重点实验室,能源材料化学协同创新中心,上海 200438 |
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基金项目: | 国家自然科学基金项目(21622303)资助 |
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摘 要: | 可再生能源与电解水制氢技术的结合是实现可持续制氢的最佳途径. 然而,传统电解水技术中解决氢-氧同时、同步、同地产生的问题必须依赖于膜分离技术,大幅限制了氢-氧分离和氢气异地运输的灵活性,并阻碍了可再生能源(如风能、太阳能)与电解水技术的直接结合. 针对上述问题,作者课题组在近期提出了基于电池电极反应的分步法电解水制氢技术,即通过电池电极的可逆电化学反应将现有电解水过程拆分为制氢和制氧分立步骤,实现在无膜条件下氢气和氧气的分时、分地交替制备,提升了电解水制氢的灵活性,促进了可再生能源向氢能的直接转化. 本文将介绍这一新技术的研究进展,并分析这一技术的优点和面临的挑战.
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关 键 词: | 电池电极 电解水制氢 分步法 可再生能源 |
收稿时间: | 2018-04-25 |
The New Application of Battery-Electrode Reaction: Decoupled Hydrogen Production in Water Electrolysis |
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Abstract: | Hydrogen has been considered as a promising alternative to unsustainable fossil fuels because of its high calorific value, clean and abundant resources. Water electrolysis combined with renewable energy is regarded as the best way for hydrogen production, which will become the foundation of future hydrogen economy. For the past few years, many efforts have been employed to develop the cheap and high-performance catalyst for hydrogen evolution reaction and oxygen evolution reaction. However,the coupled hydrogen and oxygen evolution and the use of the expensive membrane have greatly restricted the flexibility of the conventional water electrolysis, and hindered the utilization of renewable energy. Recently, our group has introduced the battery-electrode as a solid-state redox mediator to separate the hydrogen and oxygen productions during water electrolysis in space and time, providing a flexible and membrane-free architecture for water splitting. This decoupled architecture also facilitates the conversion of renewable energy to hydrogen. This review highlights the research progresses, and analyzes the advantages and challenges to this new architecture. |
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Keywords: | battery-electrode water electrolysis decoupled renewable energy |
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