Citation: Zhenyang Zhao, Bowei Wang, Jian Ma, Wangcheng Zhan, Li Wang, Yanglong Guo, Yun Guo, Guanzhong Lu. Catalytic combustion of methane over Pd/SnO₂ catalysts[J]. Chinese Journal of Catalysis, ;2017, 38(8): 1322-1329. shu

Catalytic combustion of methane over Pd/SnO₂ catalysts

Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China

Received Date: 26 March 2017
Revised Date: 18 May 2017

Fund Project: This work was supported by the National High Technology Research and Development Program of China (2015AA034603), the National Key Research and Development Program of China (2016YFC0204300), the National Natural Science Foundation of China (21171055, 21333003, 21571061), the "Shu Guang" Project of the Shanghai Municipal Education Commission (12SG29), and the Commission of Science and Technology of Shanghai Municipality (15DZ1205305).

SnO₂-supported Pd catalysts were prepared and the effects of the support calcination tempera-ture on the subsequent catalytic activity during methane combustion were investigated. The physicochemical properties of the Pd/SnO₂ were characterized by X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, oxygen temperature-programmed desorption and CH₄ temperature-programmed surface reaction. Only crystalline Pd species were found on the catalysts fabricated from the supports calcined above 800℃. It was also determined that lattice geometry matching between PdO and SnO₂ in the catalyst made with a support calcined at 1200℃ facilitated oxygen activation from SnO₂ to vacant oxygen sites on the PdO/Pd surface via the back-spillover of oxygen. This effect in turn enhanced the catalytic combustion process. The activity of this material was clearly increased compared with the catalysts that did not exhibit lattice matching between the PdO and support.
- Methane combustion,
- Palladium,
- Tin oxide,
- Lattice match,
- Oxygen activation
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Catalytic combustion of methane over Pd/SnO₂ catalysts