Volume 63, Issue 13 e202400828
Communication

Light-Driven C−C Coupling for Targeted Synthesis of CH3COOH with Nearly 100 % Selectivity from CO2

Jinyu Ding

Jinyu Ding

Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122 Wuxi, China

These authors contributed equally to this work.

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Peijin Du

Peijin Du

Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122 Wuxi, China

These authors contributed equally to this work.

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Juncheng Zhu

Juncheng Zhu

Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026 Hefei, China

These authors contributed equally to this work.

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Qing Hu

Qing Hu

Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122 Wuxi, China

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Dongpo He

Dongpo He

Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122 Wuxi, China

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Yang Wu

Yang Wu

Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026 Hefei, China

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Wenxiu Liu

Wenxiu Liu

Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026 Hefei, China

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Dr. Shan Zhu

Dr. Shan Zhu

State Grid Anhui Electric Power Research Institute, 230601 Hefei, China

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Prof. Wensheng Yan

Prof. Wensheng Yan

Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026 Hefei, China

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Dr. Jun Hu

Dr. Jun Hu

Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026 Hefei, China

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Prof. Junfa Zhu

Prof. Junfa Zhu

Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026 Hefei, China

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Prof. Qingxia Chen

Corresponding Author

Prof. Qingxia Chen

Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122 Wuxi, China

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Prof. Xingchen Jiao

Corresponding Author

Prof. Xingchen Jiao

Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, 214122 Wuxi, China

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Prof. Yi Xie

Corresponding Author

Prof. Yi Xie

Hefei National Research Center for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, University of Science and Technology of China, 230026 Hefei, China

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First published: 07 February 2024
Citations: 13

Graphical Abstract

The CO2 photoreduction towards CH3COOH with nearly 100 % selectivity is realized over a catalyst with charge asymmetric metal pair sites, wherein the metal charge asymmetric active sites induced by doping engineering can boost the C−C coupling of double COOH* intermediates.

Abstract

Targeted synthesis of acetic acid (CH3COOH) from CO2 photoreduction under mild conditions mainly limits by the kinetic challenge of the C−C coupling. Herein, we utilized doping engineering to build charge-asymmetrical metal pair sites for boosted C−C coupling, enhancing the activity and selectivity of CO2 photoreduction towards CH3COOH. As a prototype, the Pd doped Co3O4 atomic layers are synthesized, where the established charge-asymmetrical cobalt pair sites are verified by X-ray photoelectron spectroscopy and X-ray absorption near edge spectroscopy spectra. Theoretical calculations not only reveal the charge-asymmetrical cobalt pair sites caused by Pd atom doping, but also manifest the promoted C−C coupling of double *COOH intermediates through shortening of the coupled C−C bond distance from 1.54 to 1.52 Å and lowering their formation energy barrier from 0.77 to 0.33 eV. Importantly, the decreased reaction energy barrier from the protonation of two*COOH into *CO intermediates for the Pd-Co3O4 atomic layer slab is 0.49 eV, higher than that of the Co3O4 atomic layer slab (0.41 eV). Therefore, the Pd-Co3O4 atomic layers exhibit the CH3COOH evolution rate of ca. 13.8 μmol g−1 h−1 with near 100% selectivity, both of which outperform all previously reported single photocatalysts for CO2 photoreduction towards CH3COOH under similar conditions.

Data Availability Statement

Research data are not shared.

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