<i>In situ</i>-synthesized Co and N-doped mesoporous hollow silica spheres for the selective oxidation of ethylbenzene

Lan, Yingying; Yi, Chengfeng; Liu, Zhigang

doi:10.1039/d3cp01144e

Cited by 6 publications

(1 citation statement)

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“…The selective oxidation of arylalkanes to desired oxygen-containing compounds is a valuable reaction in the chemical industry with the increasing demand for various functional molecules by modern society. A representative example is the selective oxidation of ethylbenzene to acetophenone, which is an important organic intermediate for various pharmaceuticals, perfumes and fine chemicals [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. However, the available methods for ethylbenzene oxidation generally show some drawbacks, such as harsh reaction conditions (e.g., high temperature/pressure), environmental pollutions (e.g., hazardous oxidants and organic solvents) and low catalytic performances [ 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Cobalt Encapsulated in Nitrogen-Doped Graphite-like Shells as Efficient Catalyst for Selective Oxidation of Arylalkanes

Li,

Ali,

Zuhra

et al. 2023

Molecules

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Selective oxidation of ethylbenzene to acetophenne is an important process in both organic synthesis and fine chemicals diligence. The cobalt-based catalysts combined with nitrogen-doped carbon have received great attention in ethylbenzene (EB) oxidation. Here, a series of cobalt catalysts with metallic cobalt nanoparticles (NPs) encapsulated in nitrogen-doped graphite-like carbon shells (Co@NC) have been constructed through the one-pot pyrolysis method in the presence of different nitrogen-containing compounds (urea, dicyandiamide and melamine), and their catalytic performance in solvent-free oxidation of EB with tert-butyl hydrogen peroxide (TBHP) as an oxidant was investigated. Under optimized conditions, the UCo@NC (urea as nitrogen source) could afford 95.2% conversion of EB and 96.0% selectivity to acetophenone, and the substrate scalability was remarkable. Kinetics show that UCo@NC contributes to EB oxidation with an apparent activation energy of 32.3 kJ/mol. The synergistic effect between metallic cobalt NPs and nitrogen-doped graphite-like carbon layers was obviously observed and, especially, the graphitic N species plays a key role during the oxidation reaction. The structure–performance relationship illustrated that EB oxidation was a free radical reaction through 1-phenylethanol as an intermediate, and the possible reaction mechanistic has been proposed.

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Section: Introductionmentioning

confidence: 99%

Cobalt Encapsulated in Nitrogen-Doped Graphite-like Shells as Efficient Catalyst for Selective Oxidation of Arylalkanes

Li,

Ali,

Zuhra

et al. 2023

Molecules

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Constructing Cu+ and Lewis acid sites enabling the generation of highly reactive N‑oxyl radical for the efficient aerobic oxidation of alkylarenes

Tian,

Wang,

Hou

et al. 2024

Applied Catalysis A: General

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Cobalt and nitrogen co-modified hollow periodic mesoporous organosilica spheres for selective oxidation of aryl alkanes

Lan,

Yi,

Liu

2024

Applied Surface Science

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In situ-synthesized Co and N-doped mesoporous hollow silica spheres for the selective oxidation of ethylbenzene

Abstract: Transition metal and nitrogen co-doped carbon materials (M-N-C) have attracted great attention in the field of catalysis due to their high atomic utilization and outstanding catalytic performance. Herein, a series...

Cited by 6 publications

References 48 publications

Cobalt Encapsulated in Nitrogen-Doped Graphite-like Shells as Efficient Catalyst for Selective Oxidation of Arylalkanes

Cobalt Encapsulated in Nitrogen-Doped Graphite-like Shells as Efficient Catalyst for Selective Oxidation of Arylalkanes

Constructing Cu+ and Lewis acid sites enabling the generation of highly reactive N‑oxyl radical for the efficient aerobic oxidation of alkylarenes

Cobalt and nitrogen co-modified hollow periodic mesoporous organosilica spheres for selective oxidation of aryl alkanes

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