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Pressurized N directly fed to the RuAu/CeO catalyst porous electrode in a proton exchange membrane electrolyzer favoring electrochemical NH production

The limited N 2 solubility in the present aqueous electrolyte critically restricts the selectivity and activity of environment-friendly electrochemical NH 3 production at high current density. Here we developed a high-performance electrolyzer for the electrochemical N 2 reduction reaction (eNRR) usi...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2022-11, Vol.58 (93), p.133-136
Main Authors: Tan, Lianqiao, Wang, Meng, Deng, Mingming, Tong, Cheng, Feng, Xin, Liao, Qiang, Wei, Zidong
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Summary:The limited N 2 solubility in the present aqueous electrolyte critically restricts the selectivity and activity of environment-friendly electrochemical NH 3 production at high current density. Here we developed a high-performance electrolyzer for the electrochemical N 2 reduction reaction (eNRR) using amorphous RuAu clusters anchored on CeO 1.88 nanorods with rich oxygen vacancies (OVs) as the catalyst and a proton exchange membrane (PEM) as the solid-state electrolyte, in which N 2 is directly delivered to the electrode across a gas diffusion layer. The PEM electrolyzer achieved a remarkable NH 3 yield rate of 185.53 μg mg −1 h −1 at −0.3 V vs. RHE under an applied N 2 pressure of 4 bar, which is 5 times higher than that in aqueous electrolyte. A high-performance electrolyzer for eNRR using PEM as electrolyte, in which the N 2 is directly delivered to catalyst across a gas diffusion layer. The PEM electrolyzer achieved a remarkable eNRR activity, surpassing that in aqueous electrolyte.
ISSN:1359-7345
1364-548X
DOI:10.1039/d2cc04488a