Room-temperature electrochemical water–gas shift reaction for high purity hydrogen production

Xiaoju Cui, Hai-Yan Su, Ruixue Chen, Liang Yu, Jinchao Dong, Chao Ma, Suheng Wang, Jianfeng Li, Fan Yang, Jianping Xiao, Mengtao Zhang, Ding Ma, Dehui Deng (), Dong H. Zhang, Zhongqun Tian and Xinhe Bao
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Xiaoju Cui: Chinese Academy of Sciences
Hai-Yan Su: Chinese Academy of Sciences
Ruixue Chen: Chinese Academy of Sciences
Liang Yu: Chinese Academy of Sciences
Jinchao Dong: Xiamen University
Chao Ma: Hunan University
Suheng Wang: Chinese Academy of Sciences
Jianfeng Li: Xiamen University
Fan Yang: Chinese Academy of Sciences
Jianping Xiao: Chinese Academy of Sciences
Mengtao Zhang: Peking University
Ding Ma: Peking University
Dehui Deng: Chinese Academy of Sciences
Dong H. Zhang: Chinese Academy of Sciences
Zhongqun Tian: Xiamen University
Xinhe Bao: Chinese Academy of Sciences

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract Traditional water–gas shift reaction provides one primary route for industrial production of clean-energy hydrogen. However, this process operates at high temperatures and pressures, and requires additional separation of H2 from products containing CO2, CH4 and residual CO. Herein, we report a room-temperature electrochemical water–gas shift process for direct production of high purity hydrogen (over 99.99%) with a faradaic efficiency of approximately 100%. Through rational design of anode structure to facilitate CO diffusion and PtCu catalyst to optimize CO adsorption, the anodic onset potential is lowered to almost 0 volts versus the reversible hydrogen electrode at room temperature and atmospheric pressure. The optimized PtCu catalyst achieves a current density of 70.0 mA cm−2 at 0.6 volts which is over 12 times that of commercial Pt/C (40 wt.%) catalyst, and remains stable for even more than 475 h. This study opens a new and promising route of producing high purity hydrogen.

Date: 2019
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DOI: 10.1038/s41467-018-07937-w

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