Hydrogen generation with acid/alkaline amphoteric water electrolysis

doi:10.1016/j.jechem.2018.12.022

能源化学(英文版) ›› 2019, Vol. 38 ›› Issue (11): 162-169.DOI: 10.1016/j.jechem.2018.12.022

Hydrogen generation with acid/alkaline amphoteric water electrolysis

Qing Lei, Baoguo Wang, Peican Wang, Shuai Liu

The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

收稿日期:2018-11-05 修回日期:2018-12-16 出版日期:2019-11-15 发布日期:2020-12-18
通讯作者: Baoguo Wang, bgwang@tsinghua.edu.cn
基金资助:
The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (Nos. 51672210, 21875183) and the National Program for Support of Top-notch Young Professionals.

Hydrogen generation with acid/alkaline amphoteric water electrolysis

Qing Lei, Baoguo Wang, Peican Wang, Shuai Liu

The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received:2018-11-05 Revised:2018-12-16 Online:2019-11-15 Published:2020-12-18
Contact: Baoguo Wang, bgwang@tsinghua.edu.cn
Supported by:
The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (Nos. 51672210, 21875183) and the National Program for Support of Top-notch Young Professionals.

摘要/Abstract

摘要： To reduce the energy consumption of the electrolytic hydrogen generation process, we propose a novel approach to generate hydrogen with acidic/alkaline amphoteric water electrolysis, wherein hydrogen is produced inside an acidic solution and oxygen evolved under alkaline condition, and a membrane is employed in the middle of the electrolyzer to restrain neutralization. The electrode polarization is greatly reduced due to the specific arrangement of the acidic/alkaline amphoteric electrolyzer. The rate of hydrogen production achieves over four times higher than that of the alkaline aqueous solution at 2.2 V, and the energy consumption is reduced approximately 30% under the current density of 200 mA/cm². The investigation of transmembrane potential drop indicates water splitting on the membrane surfaces, which compensates for acid or alkaline loss on-site and maintains the concentration approximately constant during electrolysis process. The acidic/alkaline amphoteric water electrolysis is promising as an energy saving, clean and sustainable hydrogen production technology.

关键词: Hydrogen production, Amphoteric electrolysis, Water splitting, Energy saving

Abstract: To reduce the energy consumption of the electrolytic hydrogen generation process, we propose a novel approach to generate hydrogen with acidic/alkaline amphoteric water electrolysis, wherein hydrogen is produced inside an acidic solution and oxygen evolved under alkaline condition, and a membrane is employed in the middle of the electrolyzer to restrain neutralization. The electrode polarization is greatly reduced due to the specific arrangement of the acidic/alkaline amphoteric electrolyzer. The rate of hydrogen production achieves over four times higher than that of the alkaline aqueous solution at 2.2 V, and the energy consumption is reduced approximately 30% under the current density of 200 mA/cm². The investigation of transmembrane potential drop indicates water splitting on the membrane surfaces, which compensates for acid or alkaline loss on-site and maintains the concentration approximately constant during electrolysis process. The acidic/alkaline amphoteric water electrolysis is promising as an energy saving, clean and sustainable hydrogen production technology.

Key words: Hydrogen production, Amphoteric electrolysis, Water splitting, Energy saving

Qing Lei, Baoguo Wang, Peican Wang, Shuai Liu. Hydrogen generation with acid/alkaline amphoteric water electrolysis[J]. 能源化学(英文版), 2019, 38(11): 162-169.

Qing Lei, Baoguo Wang, Peican Wang, Shuai Liu. Hydrogen generation with acid/alkaline amphoteric water electrolysis[J]. Journal of Energy Chemistry, 2019, 38(11): 162-169.

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Hydrogen generation with acid/alkaline amphoteric water electrolysis

Hydrogen generation with acid/alkaline amphoteric water electrolysis

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