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Water-Dissociation-Assisted Electrolysis for Hydrogen Production in a Salinity Power Cell
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-06-28 00:00:00 , DOI: 10.1021/acssuschemeng.9b02131 Xia Chen 1, 2 , Chenxiao Jiang 1 , Muhammad Aamir Shehzad 1 , Yaoming Wang 1 , Hongyan Feng 1 , Zhengjin Yang 1 , Tongwen Xu 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2019-06-28 00:00:00 , DOI: 10.1021/acssuschemeng.9b02131 Xia Chen 1, 2 , Chenxiao Jiang 1 , Muhammad Aamir Shehzad 1 , Yaoming Wang 1 , Hongyan Feng 1 , Zhengjin Yang 1 , Tongwen Xu 1
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Salinity gradient power (SGP) has attracted extensive research interests as a renewable energy source. Compared with energy generated from solar and wind, the direct adoption of SGP is currently impractical. Splitting water in salinity-gradient-power driven reverse electrodialysis appears to be an effective way to utilize such energy, producing high-purity H2, which could then serve as fuel or essential feedstock. However, H2 production on the electrode is passivated by the high water-splitting voltage and the electrode overpotentials. Here in this work, we report a novel water-dissociation-assisted hydrogen production in a salinity gradient power system, by introducing bipolar membrane as the key element. The results indicate that the thermodynamic water-splitting voltage was shifted from 1.23 to 0.4 V, producing H2 at 5.6 L·h–1·m–2-electrode with a hydrogen-conversion efficiency of up to 91 ± 6%. We envision that the produced H2 can be exploited for ammonia and synthetic gas/liquid production, contributing to a net-zero emission energy system.
中文翻译：
水解离辅助电解在盐度电池中生产氢气
作为可再生能源，盐度梯度发电（SGP）引起了广泛的研究兴趣。与太阳能和风能产生的能量相比，直接采用SGP目前尚不可行。在盐度梯度功率驱动的反向电渗析中分解水似乎是利用这种能量，产生高纯度H 2的有效方法，然后可以将H 2用作燃料或基本原料。但是，H 2高水分解电压和电极超电势会钝化电极上的生成物。在本文中，我们通过引入双极膜作为关键元素，报告了盐度梯度电力系统中新型的水离解辅助制氢。结果表明，热力学水分解电压从1.23 V变为0.4 V，在5.6 L·h –1 ·m –2-电极上产生H 2，氢转化效率高达91±6％。我们设想，所产生的H 2可用于氨和合成气/液的生产，从而有助于实现净零排放的能源系统。
更新日期：2019-06-28
中文翻译：
水解离辅助电解在盐度电池中生产氢气
作为可再生能源，盐度梯度发电（SGP）引起了广泛的研究兴趣。与太阳能和风能产生的能量相比，直接采用SGP目前尚不可行。在盐度梯度功率驱动的反向电渗析中分解水似乎是利用这种能量，产生高纯度H 2的有效方法，然后可以将H 2用作燃料或基本原料。但是，H 2高水分解电压和电极超电势会钝化电极上的生成物。在本文中，我们通过引入双极膜作为关键元素，报告了盐度梯度电力系统中新型的水离解辅助制氢。结果表明，热力学水分解电压从1.23 V变为0.4 V，在5.6 L·h –1 ·m –2-电极上产生H 2，氢转化效率高达91±6％。我们设想，所产生的H 2可用于氨和合成气/液的生产，从而有助于实现净零排放的能源系统。
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