Nanostructured bimetallic Ni-Fe phosphide nanoplates as an electrocatalyst for efficient N.sub.2 fixation under ambient conditions

Electrocatalytic nitrogen reduction reaction (NRR) under ambient conditions has been considered as a promising approach for green ammonia synthesis; however, non-precious metal-based catalysts with excellent NRR electrocatalytic performance have been scarce. Herein, self-supported bimetallic electro...

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Bibliographic Details
Published in:Journal of materials science 2020-11, Vol.55 (31), p.15252
Main Authors: Jiang, Xiaoli, He, Miao, Tang, Mengyi, Zheng, Qiaoji, Xu, Chenggang, Lin, Dunmin
Format: Article
Language:English
Subjects:
Ammonia
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Summary:Electrocatalytic nitrogen reduction reaction (NRR) under ambient conditions has been considered as a promising approach for green ammonia synthesis; however, non-precious metal-based catalysts with excellent NRR electrocatalytic performance have been scarce. Herein, self-supported bimetallic electrocatalysts of Ni.sub.12P.sub.5/FeP.sub.4 nanoplates grown on carbon cloth were synthesized by a combined process of hydrothermal technology and low-temperature phosphidation. The catalyst exhibits excellent electrocatalytic N.sub.2 fixation performance with a high NH.sub.3 yield rate of 3.08 x 10.sup.-10 mol s.sup.-1 cm.sup.-2 (16.40 [mu]g h.sup.-1 mgcat-1), Faradaic efficiency (39.9%) as well good durability at - 0.1 V in 0.1 M Na.sub.2SO.sub.4 at ambient conditions, which are attributed to the distinctive nanostructure and rational composition. Our study paves the way for expanding the scope of NRR research and designing more efficient electrochemical ammonia synthesis in the future.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-020-05085-5