Tailoring asymmetric RuCu dual-atom electrocatalyst toward ammonia synthesis from nitrate

Kaiyuan Liu, Zhiyi Sun, Xingjie Peng, Xudong Liu, Xiao Zhang, Boran Zhou, Kedi Yu, Zhengbo Chen, Qiang Zhou, Fang Zhang, Yong Wang, Xin Gao (), Wenxing Chen () and Pengwan Chen ()
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Kaiyuan Liu: Beijing Institute of Technology
Zhiyi Sun: Beijing Institute of Technology
Xingjie Peng: University of Chinese Academy of Sciences
Xudong Liu: Beijing Institute of Technology
Xiao Zhang: Beijing Institute of Technology
Boran Zhou: Capital Normal University
Kedi Yu: Capital Normal University
Zhengbo Chen: Capital Normal University
Qiang Zhou: China Academy of Ordnance Science
Fang Zhang: Beijing Institute of Technology
Yong Wang: Guangdong R&D Center for Technological Economy
Xin Gao: Beijing Institute of Technology
Wenxing Chen: Beijing Institute of Technology
Pengwan Chen: Beijing Institute of Technology

Nature Communications, 2025, vol. 16, issue 1, 1-15

Abstract: Abstract Atomically dispersed Ru-Cu dual-atom catalysts (DACs) with asymmetric coordination are critical for sustainable ammonia production via electrochemical nitrate reduction (NO3RR), but their rational synthesis remains challenging. Here, we report a pulsed discharge strategy that injects a microsecond pulse current into ruthenium (Ru) and copper (Cu) precursors supported by nitrogen-doped graphene aerogels (NGA). The atomically dispersed Ru and Cu dual atoms anchor onto nanopore defects of NGA (RuCu DAs/NGA) through explosive decomposition of the metal salt nanocrystals. The catalyst achieves 95.7% Faraday efficiency and 3.1 mg h−1 cm−2 NH3 yield at −0.4 V vs. RHE. In situ studies reveal an asymmetric RuN2-CuN3 active-site dynamic evolution during NO3RR. Density functional theory calculations demonstrate that asymmetric RuN2CuN3/C structure synergistically optimizes intermediate adsorption and reduces energy barriers of key steps. The pulsed discharge enables ultrafast synthesis of various DACs (e.g., PtCu, AgCu, PdCu, FeCu, CoCu, NiCu) with tailored coordination environments, offering a general-purpose strategy for the precise preparation of atomically dispersed dual-atom catalysts, which are traditionally challenging to synthesize.

Date: 2025
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DOI: 10.1038/s41467-025-57463-9

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