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A Defect Engineered Electrocatalyst that Promotes High-Efficiency Urea Synthesis under Ambient Conditions
Abstract
Synthesizing urea from nitrate and carbon dioxide through an electrocatalysis approach under ambient conditions is extraordinarily sustainable. However, this approach still lacks electrocatalysts developed with high catalytic efficiencies, which is a key challenge. Here, we report the high-efficiency electrocatalytic synthesis of urea using indium oxyhydroxide with oxygen vacancy defects, which enables selective C–N coupling toward standout electrocatalytic urea synthesis activity. Analysis by operando synchrotron radiation–Fourier transform infrared spectroscopy showcases that *CO 2 NH 2 protonation is the potential-determining step for the overall urea formation process. As such, defect engineering is employed to lower the energy barrier for the protonation of the *CO 2 NH 2 intermediate to accelerate urea synthesis. Consequently, the defect-engineered catalyst delivers a high Faradaic efficiency of 51.0%. In conjunction with an in-depth study on the catalytic mechanism, this design strategy may facilitate the exploration of advanced catalysts for electrochemical urea synthesis and other sustainable applications.
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Metadata
- Authors
- Lv, C., Lee, C., Zhong, L., Liu, H., Liu, J., Yang, L., Yan, C., Yu, W., Hng, H. H., Qi, Z., Song, L., Li, S., Loh, K. P., Yan, Q., & Yu, G.
- Venue
- ACS Nano
- Publisher
- American Chemical Society (ACS)
- Published
- 2022-04-01
- Volume
- 16
- Issue
- 5
- Pages
- 8213-8222
- ISSN
- 1936-0851 (ISSN-L)
- 1936-086X
- OpenAlex
- W4224282690
- Cited by
- 339
- References
- 39
- FWCI
- 12.84
- Type
- journal article
- Language
- en
- Open access
- closed
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