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Engineering Oxygen Vacancies into ZSM-5@MnOx catalysts for Efficient Benzyl Alcohol Oxidation
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  • Tingting Qi,
  • Linyu Zhou,
  • Yingjiao Li,
  • Guang-Wen Chu,
  • Jie Shi,
  • Hai-Kui Zou,
  • Baochang Sun
Tingting Qi
Beijing University of Chemical Technology College of Chemical Engineering

Corresponding Author:qtt700700@163.com

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Linyu Zhou
Beijing University of Chemical Technology College of Chemical Engineering
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Yingjiao Li
Beijing University of Chemical Technology College of Chemical Engineering
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Guang-Wen Chu
Beijing University of Chemical Technology College of Chemical Engineering
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Jie Shi
Beijing University of Chemical Technology
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Hai-Kui Zou
Beijing University of Chemical Technology
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Baochang Sun
Beijing University of Chemical Technology College of Chemical Engineering
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Abstract

In this paper, ZSM-5@MnOx catalyst was firstly prepared by in situ growth for the selective oxidation of benzyl alcohol to benzaldehyde. The coating effects of MnOx on ZSM-5 and OV formation mechanism at the ZSM-5-MnOx interface were investigated. Results showed that the sodium ions of ZSM-5 are found to be conducive to the better coating for MnOx. Hydrogen protons of zeolite can dehydrate with the OH groups on MnOx to generate the OVs where the oxidation of benzyl alcohol occurs. Besides, the deep dehydration at the ZSM-5-MnOx interface via increasing post-treatment temperature can further enrich the OV concentrations. The ~100% benzyl alcohol conversion and ~100% benzaldehyde selectivity over the ZSM-5@MnOx catalyst can be obtained within 3 h at 383 K. The findings of the structure-activity relationship of zeolite’s surface properties and OVs over MnOx can provide important guiding principles for the rational design of oxidation catalysts.