Volume 133, Issue 41 pp. 22687-22695
Forschungsartikel

Activity Trends and Mechanisms in Peroxymonosulfate-Assisted Catalytic Production of Singlet Oxygen over Atomic Metal-N-C Catalysts

Yun Gao

Yun Gao

College of Biomass Science and Engineering, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065 China

These authors contributed equally to this work.

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Dr. Tongwei Wu

Dr. Tongwei Wu

Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054 China

State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054 Sichuan, China

These authors contributed equally to this work.

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Chengdong Yang

Chengdong Yang

College of Biomass Science and Engineering, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065 China

These authors contributed equally to this work.

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Chao Ma

Chao Ma

Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054 China

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Zhenyang Zhao

Zhenyang Zhao

College of Biomass Science and Engineering, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065 China

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Zihe Wu

Zihe Wu

College of Biomass Science and Engineering, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065 China

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Dr. Sujiao Cao

Dr. Sujiao Cao

College of Biomass Science and Engineering, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065 China

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Dr. Wei Geng

Dr. Wei Geng

Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054 China

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Prof. Yi Wang

Prof. Yi Wang

College of Materials Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016 China

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Prof. Yongyi Yao

Corresponding Author

Prof. Yongyi Yao

College of Biomass Science and Engineering, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065 China

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Prof. Yanning Zhang

Corresponding Author

Prof. Yanning Zhang

Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 610054 China

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Prof. Chong Cheng

Corresponding Author

Prof. Chong Cheng

College of Biomass Science and Engineering, College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065 China

Department of Chemistry and Biochemistry, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany

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First published: 13 August 2021
Citations: 15

Abstract

We synthesized a series of carbon-supported atomic metal-N-C catalysts (M-SACs: M=Mn, Fe, Co, Ni, Cu) with similar structural and physicochemical properties to uncover their catalytic activity trends and mechanisms. The peroxymonosulfate (PMS) catalytic activity trends are Fe-SAC>Co-SAC>Mn-SAC>Ni-SAC>Cu-SAC, and Fe-SAC displays the best single-site kinetic value (1.65×105 min−1 mol−1) compared to the other metal-N-C species. First-principles calculations indicate that the most reasonable reaction pathway for 1O2 production is PMS→OH*→O*→1O2; M-SACs that exhibit moderate and near-average Gibbs free energies in each reaction step have a better catalytic activity, which is the key for the outstanding performance of Fe-SACs. This study gives the atomic-scale understanding of fundamental catalytic trends and mechanisms of PMS-assisted reactive oxygen species production via M-SACs, thus providing guidance for developing M-SACs for catalytic organic pollutant degradation.

Conflict of interest

The authors have filed a provisional patent application regarding the synthesis of M-SACs for PMS-assisted ROS production.

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