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Research Article

Heterostructure Cu3P-Ni2P/CP catalyst assembled membrane electrode for high-efficiency electrocatalytic nitrate to ammonia

Meng Jin1,2,§, Jiafang Liu1,2,§, Xian Zhang3( ), Shengbo Zhang1,2, Wenyi Li1,2, Dianding Sun1,2, Yunxia Zhang1,2, Guozhong Wang1,2, Haimin Zhang1,2( )
Laboratory of Materials Physics, Centre for Environmental and Energy Nanomaterials, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
University of Science and Technology of China, Hefei 230026, China
Anhui Contango New Energy Technology Co., Ltd., Hefei 230031, China

§ Meng Jin and Jiafang Liu contributed equally to this work.

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Graphical Abstract

Heterostructure copper-nickel phosphide electrocatalysts were successfully fabricated via a simple vapor-phase hydrothermal method, as the electrocatalysis exhibited outstanding electrocatalytic nitrite to ammonia performance utilizing a membrane-electrode-assemblies (MEA) system.

Abstract

Electrochemical nitrate reduction reaction (NO3RR) is a promising means for generating the energy carrier ammonia. Herein, we report the synthesis of heterostructure copper-nickel phosphide electrocatalysts via a simple vapor-phase hydrothermal method. The resultant catalysts were evaluated for electrocatalytic nitrate reduction to ammonia (NH3) in three-type electrochemical reactors. In detail, the regulation mechanism of the heterogeneous Cu3P-Ni2P/CP-x for NO3RR performance was systematically studied through the H-type cell, rotating disk electrode setup, and membrane-electrode-assemblies (MEA) electrolyzer. As a result, the Cu3P-Ni2P/CP-0.5 displays the practicability in an MEA system with an anion exchange membrane, affording the largest ammonia yield rate (RNH3) of 1.9 mmol·h−1·cm−2, exceeding most of the electrocatalytic nitrate reduction electrocatalysts reported to date. The theoretical calculations and in-situ spectroscopy characterizations uncover that the formed heterointerface in Cu3P-Ni2P/CP is beneficial for promoting nitrate adsorption, activation, and conversion to ammonia through the successive hydrodeoxygenation pathway.

Keywords

electrocatalytic nitrate reduction to ammoniathree-type reactorsmembrane-electrode-assemblies systemoperando ATR-IRRASsuccessive hydrodeoxygenation pathway

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Nano Research
Volume 17 Issue 6,
June 2024
Pages 4872-4881
DOI: 10.1007/s12274-024-6474-z
Cite this article:
Jin M, Liu J, Zhang X, et al. Heterostructure Cu3P-Ni2P/CP catalyst assembled membrane electrode for high-efficiency electrocatalytic nitrate to ammonia. Nano Research, 2024, 17(6): 4872-4881. https://doi.org/10.1007/s12274-024-6474-z
Topics:
Nitrate reduction reaction

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Received: 16 November 2023
Revised: 21 December 2023
Accepted: 06 January 2024
Published: 08 February 2024
© Tsinghua University Press 2024
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