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Issue 5, 2020
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Unusual electrochemical N2 reduction activity in an earth-abundant iron catalyst via phosphorous modulation

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Abstract

Fe-enabled high-performance ambient electrochemical N2 reduction still remains a big challenge. Here, we report the unusual role of phosphorous in modulating the electrochemical N2 reduction activity of an Fe catalyst. An FeP2 nanoparticle–reduced graphene oxide hybrid (FeP2–rGO) attains a large NH3 yield of 35.26 μg h−1 mgcat.−1 (7.06 μg h−1 cm−2) and a high faradaic efficiency of 21.99% at −0.40 V vs. reversible hydrogen electrode in 0.5 M LiClO4, outperforming the FeP–rGO hybrid (17.13 μg h−1 mgcat.−1; 8.57%). Theoretical calculations reveal that FeP2 possesses decreased catalytic activity for the hydrogen evolution reaction, higher N2 adsorption energy, and a larger number of active sites than FeP.

Graphical abstract: Unusual electrochemical N2 reduction activity in an earth-abundant iron catalyst via phosphorous modulation

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Article information


Submitted
25 Oct 2019
Accepted
10 Dec 2019
First published
16 Dec 2019

Chem. Commun., 2020,56, 731-734
Article type
Communication

Unusual electrochemical N2 reduction activity in an earth-abundant iron catalyst via phosphorous modulation

X. Zhu, T. Wu, L. Ji, Q. Liu, Y. Luo, G. Cui, Y. Xiang, Y. Zhang, B. Zheng and X. Sun, Chem. Commun., 2020, 56, 731
DOI: 10.1039/C9CC08352A

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