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Title: A defect engineered electrocatalyst that promotes high-efficiency urea synthesis under ambient conditions
Authors: Lv, Chade
Lee, Carmen
Zhong, Lixiang
Liu, Hengjie
Liu, Jiawei
Yang, Lan
Yan, Chunshuang
Yu, Wei
Hng, Huey Hoon
Qi, Zeming
Song, Li
Li, Shuzhou
Loh, Kian Ping
Yan, Qingyu
Yu, Guihua
Keywords: Engineering::Materials
Issue Date: 2022
Source: 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. (2022). A defect engineered electrocatalyst that promotes high-efficiency urea synthesis under ambient conditions. ACS Nano, 16(5), 8213-8222.
Project: 2020-T1-001-031
Journal: ACS Nano
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 *CO2NH2 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 *CO2NH2 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.
ISSN: 1936-0851
DOI: 10.1021/acsnano.2c01956
Schools: School of Materials Science and Engineering 
Rights: © 2022 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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