Active sites and reaction mechanism for N-doped carbocatalysis of phenol removal

Mingjie Zhang; Chen Han; Wenyao Chen; Wei Luo; Yueqiang Cao; Gang Qian; Xinggui Zhou; Xiaoguang Duan; Shaobin Wang; Xuezhi Duan

Green Energy & Environment (Oct 2020)

Active sites and reaction mechanism for N-doped carbocatalysis of phenol removal

Mingjie Zhang,
Chen Han,
Wenyao Chen,
Wei Luo,
Yueqiang Cao,
Gang Qian,
Xinggui Zhou,
Xiaoguang Duan,
Shaobin Wang,
Xuezhi Duan

Affiliations

Mingjie Zhang: State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
Chen Han: State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, Western Australia 6845, Australia
Wenyao Chen: State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
Wei Luo: State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
Yueqiang Cao: State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
Gang Qian: State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
Xinggui Zhou: State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
Xiaoguang Duan: School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia
Shaobin Wang: School of Chemical Engineering, The University of Adelaide, Adelaide, South Australia 5005, Australia
Xuezhi Duan: State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; Corresponding author.

Journal volume & issue: Vol. 5, no. 4
pp. 444 – 452

Abstract

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Heteroatom-doping of carbocatalysts has been a powerful strategy to remarkably enhance the catalytic performance. Herein, the underlying nature of N promotional effects on peroxymonosulfate (PMS) activation for phenol removal is understood by combining kinetics analysis with multiple techniques. A strategy using mixed acid oxidation of carbon nanotube (CNT) followed by NH3 treatment is employed to yield a series of catalysts with different N-doping contents but similar fraction of sp2-hybridized carbon and defective degree, endowing with a chance to discriminate the dominant N-containing active sites. The multi-sites kinetics analysis suggests the graphitic N-containing sites as the dominant active sites. The mechanism of the surface-bound reactive species is also discriminated as the dominant reaction mechanism. The insights reported here could provide the methodology to fundamentally understand the heteroatom-doping effects of carbocatalysis.

Published in Green Energy & Environment

ISSN: 2468-0257 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Mechanical engineering and machinery: Renewable energy sources; Science: Biology (General): Ecology
Website: https://www.keaipublishing.com/en/journals/green-energy-and-environment/

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