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


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2019-01-08

AUTHORS

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, Xinhe Bao

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. More... »

PAGES

86

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41467-018-07937-w

DOI

http://dx.doi.org/10.1038/s41467-018-07937-w

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https://app.dimensions.ai/details/publication/pub.1111061197

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30622261


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27 CO diffusion
28 Faradaic efficiency
29 Herein
30 Ma
31 Pt/C catalyst
32 PtCu catalysts
33 Room-temperature electrochemical water–gas shift reaction
34 Traditional water-gas shift reaction
35 additional separation
36 adsorption
37 anode structure
38 anodic onset potential
39 atmospheric pressure
40 catalyst
41 clean energy hydrogen
42 commercial Pt/C catalyst
43 current density
44 density
45 design
46 diffusion
47 direct production
48 efficiency
49 electrochemical water-gas shift process
50 electrochemical water–gas shift reaction
51 electrode
52 high temperature
53 high-purity hydrogen
54 high-purity hydrogen production
55 hydrogen
56 hydrogen electrode
57 hydrogen production
58 industrial production
59 onset potential
60 potential
61 pressure
62 primary route
63 process
64 production
65 products
66 promising route
67 purity hydrogen
68 purity hydrogen production
69 rational design
70 reaction
71 residual CO
72 reversible hydrogen electrode
73 room temperature
74 room-temperature electrochemical water-gas shift process
75 route
76 separation
77 shift process
78 shift reaction
79 structure
80 study
81 temperature
82 time
83 volts
84 water gas shift process
85 water gas shift reaction
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