Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 283, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119606
Keywords
Nitrogen reduction; Nitrogen fixation; Bimetallic catalyst; FeAg cluster; Ammonia synthesis
Funding
- Guangxi Science and Technology Project [AA17204083, AB16380030]
- National Natural Science Foundation of China [U1705252]
- Fujian Province [U1705252]
- National Basic Research Program of China [21972027]
- Natural Science Foundation of Guangxi [2016GXNSFCB380002]
- Innovation Project of Guangxi Graduate Education [YCBZ2019012]
- Multifunction Computer Center of Guangxi University
- LvLiang Cloud Computing Center of China (TianHe-2)
- Natural Science Foundation of Guangdong Province [2015A030312007]
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By tuning the pore numbers of the membrane in an H-type cell, the transfer rate of H+ ions and the Faradaic efficiency can be linearly regulated, and a physical model has been constructed to reveal the changing mechanism of efficiency. The theoretical results are consistent with experimental ones obtained by using synthetic plasma-enhanced bimetallic catalyst, showing a continuous enhancement of Faradaic efficiency from 9.04% to 41.86%.
Electrocatalytic nitrogen reduction offers a dream way to produce active nitrogen for agriculture and highenergy-dense carbon-free fuels for our blue planet. However, it suffers from extremely low faradaic efficiency values, because the conversion rate is greatly limited by the competing hydrogen reduction reaction, seeking for a new strategy to solve the bottleneck problem is highly desirable. Herein, it is found that H+ ions transfer rate can be linearly regulated by tuning the pore numbers of the membrane in an H-type cell, while the Faradaic efficiency can be continuously regulated in the same way. Meanwhile, a physical model has been constructed to reveal the changing mechanism of the Faradaic efficiency. The theoretical results well agree with the experimental ones obtained by the synthetic plasma-enhanced bimetallic catalyst (FeAg nanoclusters dispersed on Si nanowire). In this study we achieved a continuous enhancement of the Faradaic efficiency from 9.04 % to 41.86 %.
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