posted on 2021-12-23, 15:05authored byMenglan Xiao, Xiaolin Yu, Yucong Guo, Maofa Ge
Electronic metal–support interaction
(EMSI) has attracted
great attention in volatile organic compound (VOC) abatement. Herein,
Pt@Co3O4 catalysts were prepared via a metal–organic
framework (MOF) in situ growth approach to boost toluene degradation.
The partial electron transfer from Co3O4 to
Pt species was induced by the EMSI effect to generate the electron-rich
Pt and Co3+ species. The electrophilic O2 molecules
could be activated by picking up the electrons from electron-rich
Pt species to form nucleophilic oxygen species, which is conducive
to attack C–H bonds in toluene. The redox ability and surface
oxygen species activity of catalysts were improved due to strong EMSI.
As expected, the excellent toluene activity was achieved, meanwhile
exhibiting satisfactory water resistance and long-term stability for
toluene combustion. In situ diffuse reflectance infrared Fourier transform
spectroscopy results elucidated that surface lattice oxygen species
should deeply participate in toluene degradation, which could be efficiently
replenished by gaseous oxygen. This work may provide a new idea for
exploring the relationship between the electron transfer effect and
efficient catalytic performance of VOCs.