High-efficiency C3 electrosynthesis on a lattice-strain-stabilized nitrogen-doped Cu surface

Wenzhe Niu, Jie Feng, Junfeng Chen, Lei Deng, Wen Guo (), Huajing Li, Liqiang Zhang, Youyong Li and Bo Zhang ()
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Wenzhe Niu: Fudan University
Jie Feng: Soochow University
Junfeng Chen: Fudan University
Lei Deng: Yanshan University
Wen Guo: Fudan University
Huajing Li: Fudan University
Liqiang Zhang: Yanshan University
Youyong Li: Soochow University
Bo Zhang: Fudan University

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract The synthesis of multi-carbon (C2+) fuels via electrocatalytic reduction of CO, H2O using renewable electricity, represents a significant stride in sustainable energy storage and carbon recycling. The foremost challenge in this field is the production of extended-chain carbon compounds (Cn, n ≥ 3), wherein elevated *CO coverage (θco) and its subsequent multiple-step coupling are both critical. Notwithstanding, there exists a “seesaw” dynamic between intensifying *CO adsorption to augment θco and surmounting the C-C coupling barrier, which have not been simultaneously realized within a singular catalyst yet. Here, we introduce a facilely synthesized lattice-strain-stabilized nitrogen-doped Cu (LSN-Cu) with abundant defect sites and robust nitrogen integration. The low-coordination sites enhance θco and concurrently, the compressive strain substantially fortifies nitrogen dopants on the catalyst surface, promoting C-C coupling activity. The n-propanol formation on the LSN-Cu electrode exhibits a 54% faradaic efficiency and a 29% half-cell energy efficiency. Moreover, within a membrane electrode assembly setup, a stable n-propanol electrosynthesis over 180 h at a total current density of 300 mA cm−2 is obtained.

Date: 2024
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DOI: 10.1038/s41467-024-51478-4

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