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ChemSusChem. 2018 Nov 23;11(22):3965-3974. doi: 10.1002/cssc.201801709. Epub 2018 Oct 23.

Interfacial CoOx Layers on TiO2 as an Efficient Catalyst for Solvent-Free Aerobic Oxidation of Hydrocarbons.

Author information

1
Key Lab of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P.R. China.
2
Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou, 310028, P.R. China.
3
Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, P.R. China.
4
State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan, 750021, P.R. China.
5
Electron Microscopy Research Center, Korea Basic Science Institute, Daejeon, 34133, South Korea.
6
Key Laboratory of Mobile Materials MOE, Electron Microscopy Center and School of Materials Science & Engineering, Jilin University, Changchun, 130012, P.R. China.
7
CIC Energigune, Albert Einstein 48, 01510 Miñano, and IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain.

Abstract

Construction of efficient interfaces to improve the performance of supported metal catalysts is a challenging but effective technique. A newly synthesized catalyst with layered cobalt oxide on the surface of titania (layer-CoOx /TiO2 ) is highly selective towards the aerobic oxidation of C-H bonds in a series of hydrocarbons under sustainable conditions. The layer-CoOx /TiO2 easily outperforms the state-of-the-art noble metal catalysts and homogeneous cobalt salts used in industry. In-depth structural and functional characterization reveal that the layer-CoOx /TiO2 readily reacts with O2 for the adsorption and activation of C-H bonds. The layered structure of CoOx can maximize the interfacial effect of CoOx /TiO2 leading to a good performance for the oxidation of C-H bonds.

KEYWORDS:

C−H activation; aerobic oxidation; cobalt; heterogenous catalysis; titania

PMID:
30350924
DOI:
10.1002/cssc.201801709

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