AI Article Synopsis
- A core-shell catalyst featuring a CoO core and ZSM-5 shell was created using a microwave hydrothermal method and tested for dichloromethane (DCM) oxidation.
- The introduction of chromium into the catalyst significantly enhanced its catalytic activity due to the interaction between CrO and CoO, improving the structure and oxygen mobility.
- In situ studies led to a proposed reaction pathway for the oxidation of CHCl over the Cr-Co@Z catalyst, highlighting the benefits of its enhanced dechlorination ability.
Article Abstract
A core-shell catalyst which consists of a CoO core and ZSM-5 shell, was prepared by microwave hydrothermal method and subjected for dichloromethane (DCM) oxidation. Chromium, cerium, niobium, and manganese species were separately introduced into the core-shell catalyst using the wet precipitation method and denoted as M-Co@Z (M = Cr, Ce, Nb, Mn). The catalytic activity of the Cr-Co@Z catalyst was significantly increased due to the interaction between CrO and CoO. The results of Raman spectra indicated the incorporation of chromium into the CoO lattice and revealed the existence of the interaction between CrO and CoO. The synergistic effect between CrO and CoO might be conducive to the generation of highly defective structure and increase the ratio of Co/Co of the sample, leading to its better oxygen mobility. The dechlorination ability of Cr-Co@Z was also promoted due to the enhanced mobility of lattice oxygen. Based on in situ DRIFT studies, a possible reaction route of CHCl oxidation over Cr-Co@Z catalyst was proposed.
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| http://dx.doi.org/10.1016/j.jhazmat.2021.125327 | DOI Listing |
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