Strain relaxation enhances ammonia electrosynthesis from nitrate on Cu/CuAu core/shell nanocrystals with ordered intermetallic layers

IF 11.5 Q1 CHEMISTRY, PHYSICAL
Qiang Gao, Bingqing Yao, Yuanqi Liu, Lei Shi, Zihao Yan, Libang Xu, Qian He, Huiyuan Zhu
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引用次数: 0

Abstract

Recycling ammonia (NH3) via the electrocatalytic nitrate reduction reaction (NO3RR) offers a sustainable, energy-efficient solution for closing the nitrogen cycle while simultaneously treating nitrate-rich wastewater. In this work, we synthesized core/shell Cu/CuAu nanocubes with precisely controlled ordered intermetallic layers using a facile seed-mediated method. The compressive surface strain of the nanocrystals was finely regulated by adjusting the layers of the CuAu shell. Specifically, the strain-relaxed Cu/CuAu catalysts exhibit high NO3RR performance for NH3 production, achieving a Faradic efficiency of 89.9% at −0.5 V vs. the reversible hydrogen electrode (RHE) and an exceedingly high yield rate of 11.3 mol h−1 g−1 at −0.6 V vs. RHE. Furthermore, Cu/CuAu catalysts show catalytic stability over 10 consecutive cycles and 12-h electrolysis. This atomic-level control of thickness allows precise tuning of the intrinsic strain to optimize catalytic reactivity, offering a promising strategy to enhance the performance of electrocatalytic ammonia synthesis.

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来源期刊
CiteScore
10.50
自引率
6.40%
发文量
0
期刊介绍: Chem Catalysis is a monthly journal that publishes innovative research on fundamental and applied catalysis, providing a platform for researchers across chemistry, chemical engineering, and related fields. It serves as a premier resource for scientists and engineers in academia and industry, covering heterogeneous, homogeneous, and biocatalysis. Emphasizing transformative methods and technologies, the journal aims to advance understanding, introduce novel catalysts, and connect fundamental insights to real-world applications for societal benefit.
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