δ-MnO2 with an ultrahigh Mn4+ fraction is highly active and stable for catalytic wet air oxidation of phenol under mild conditions

Changjian Ma; Yaoyao Wen; Chengli Rong; Nuowei Zhang; Jinbao Zheng; Bing H. Chen

doi:10.1039/C7CY00774D

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δ-MnO₂ with an ultrahigh Mn⁴⁺ fraction is highly active and stable for catalytic wet air oxidation of phenol under mild conditions†

Changjian Ma,

^a Yaoyao Wen,^a Chengli Rong,^a Nuowei Zhang,*^a Jinbao Zheng^a and Bing H. Chen

*^a

Author affiliations

* Corresponding authors

^a Department of Chemical and Biochemical Engineering, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
E-mail: zhnw@xmu.edu.cn, chenbh@xmu.edu.cn

Abstract

δ-MnO₂ with a very high amount of Mn⁴⁺ showed high catalytic activity and stability for the catalytic wet air oxidation (CWAO) of phenol at a very low temperature of 70 °C. The abundance of Mn⁴⁺ and reactive surface oxygen species in this catalyst, its resistance to Mn leaching, and its repeatable Mn⁴⁺/Mn³⁺ (Mn⁴⁺/Mn²⁺) redox cycles contributed greatly to its remarkable catalytic performance.

$Graphical abstract: δ-MnO2 with an ultrahigh Mn4+ fraction is highly active and stable for catalytic wet air oxidation of phenol under mild conditions$

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Article information

DOI: https://doi.org/10.1039/C7CY00774D
Article type: Communication
Submitted: 19 Apr 2017
Accepted: 25 Jun 2017
First published: 26 Jun 2017

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Catal. Sci. Technol., 2017,7, 3200-3204

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δ-MnO₂ with an ultrahigh Mn⁴⁺ fraction is highly active and stable for catalytic wet air oxidation of phenol under mild conditions

C. Ma, Y. Wen, C. Rong, N. Zhang, J. Zheng and B. H. Chen, Catal. Sci. Technol., 2017, 7, 3200 DOI: 10.1039/C7CY00774D

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