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.