10.1021/acsomega.9b02370.s001
Benxia Chen
Benxia
Chen
Jia Lin
Jia
Lin
Xiaohua Chen
Xiaohua
Chen
Yelin Chen
Yelin
Chen
Yalan Xu
Yalan
Xu
Zhixiong Wang
Zhixiong
Wang
Wen Zhang
Wen
Zhang
Ying Zheng
Ying
Zheng
Cooperative Catalysis of Methane Oxidation through
Modulating the Stabilization of PdO and Electronic Properties over
Ti-Doped Alumina-Supported Palladium Catalysts
American Chemical Society
2019
methane combustion activity
heat treatment
methane oxidation
PdO particles
Ti-Doped Alumina-Supported Palladium Catalysts Poor
Ti doping
electron transfer
Electronic Properties
reactant stream
reactive oxygen mobility
CH
palladium-based catalysts
PdO lattices
cyclic performance
Cooperative Catalysis
alumina support
Ti-containing catalyst exhibits
catalysts exhibit
Br ønsted acid sites
Methane Oxidation
methane combustion
2019-11-01 19:13:20
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Cooperative_Catalysis_of_Methane_Oxidation_through_Modulating_the_Stabilization_of_PdO_and_Electronic_Properties_over_Ti-Doped_Alumina-Supported_Palladium_Catalysts/10144424
Poor low-temperature
catalytic activity and durability are the
main drawbacks of palladium-based catalysts for methane combustion.
Herein, stable and active PdO particles are constructed by incorporating
Ti into an alumina support, which makes the catalysts exhibit satisfactory
methane combustion activity. The results of comprehensive characterization
reveal that an appropriate amount of Ti doping induces the optimization
of electron transfer and distribution, thus contributing to the construction
and stabilization of active PdO lattices. The reactive oxygen mobility
is improved and the optimal PdO/Pd<sup>0</sup> combination is achieved,
thanks to the amplified PdO–support interaction. In addition,
the acid–base properties are regulated and Brønsted acid
sites are generated by virtue of the adjustment of electronic properties,
which facilitate stabilization of PdO as well. Hence, the Ti-containing
catalyst exhibits superior activity for methane oxidation at low temperatures.
Notably, the activity and cyclic performance of the catalyst can be
further enhanced when undergoing long-term and isothermal heat treatment
under the reactant stream and methane, and it demonstrates a high
performance with 90% CH<sub>4</sub> conversion at 340 °C.