SnO2‐supported Pd catalysts were prepared and the effects of the support calcination temperature on the subsequent catalytic activity during methane combustion were investigated.The physicochemical properties of the ...SnO2‐supported Pd catalysts were prepared and the effects of the support calcination temperature on the subsequent catalytic activity during methane combustion were investigated.The physicochemical properties of the Pd/SnO2were characterized by X‐ray diffraction,high‐resolution transmission electron microscopy,X‐ray photoelectron spectroscopy,oxygen temperature‐programmed desorption and CH4temperature‐programmed surface reaction.Only crystalline Pd species were found on the catalysts fabricated from the supports calcined above800°C.It was also determined that lattice geometry matching between PdO and SnO2in the catalyst made with a support calcined at1200°C facilitated oxygen activation from SnO2to 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.展开更多
基金supported by the National High Technology Research and Development Program of China (2015AA034603)the National Key Research and Development Program of China (2016YFC0204300)+2 种基金the National Natural Science Foundation of China (21171055,21333003,21571061)the "Shu Guang" Project of the Shanghai Municipal Education Commission (12SG29)the Commission of Science and Technology of Shanghai Municipality (15DZ1205305)~~
文摘SnO2‐supported Pd catalysts were prepared and the effects of the support calcination temperature on the subsequent catalytic activity during methane combustion were investigated.The physicochemical properties of the Pd/SnO2were characterized by X‐ray diffraction,high‐resolution transmission electron microscopy,X‐ray photoelectron spectroscopy,oxygen temperature‐programmed desorption and CH4temperature‐programmed surface reaction.Only crystalline Pd species were found on the catalysts fabricated from the supports calcined above800°C.It was also determined that lattice geometry matching between PdO and SnO2in the catalyst made with a support calcined at1200°C facilitated oxygen activation from SnO2to 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.
