Abstract
A series of 0.2 wt% Pd/Sn0.9Ce0.1O2 catalysts were prepared by impregnation method based on the pre-synthesis of Sn0.9Ce0.1O2 support prepared by co-precipitation method, and then characterized by Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman, CO chemical adsorption and hydrogen temperature-programmed reduction (H2-TPR) techniques. The effect of calcination temperature of the composite oxide support on the catalytic performances of the Pd/Sn0.9Ce0.1O2 catalyst for the CH4 total oxidation was studied. It is found that the catalytic activity of the Pd/Sn0.9Ce0.1O2 catalyst increases with the increase in calcination temperature of the Pd/Sn0.9Ce0.1O2 support. The 0.2 wt% Pd/Sn0.9Ce0.1O2/1100 catalyst (the Pd/Sn0.9Ce0.1O2 support was calcined at 1100 °C) exhibits the best reactive activity (T10 = 255 °C). The excellent activity of the 0.2 wt% Pd/Sn0.9Ce0.1O2/1100 catalyst should be attributed to the high reducibility of PdO, the excellent oxygen mobility of the support and the high content of active Pd2+ species on the Pd/Sn0.9Ce0.1O2 catalyst.
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Acknowledgements
This work was financially supported by the National Key Research and Development Program of China (No. 2016YFC0204300), the National Key Basic Research Program of China (No. 2013CB933200) and Science and Technology Commission of Shanghai Municipality (No. 16ZR1407900).
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Shen, K., Lin, JP., Xia, Q. et al. Tuning performance of Pd/Sn0.9Ce0.1O2 catalyst for methane combustion by optimizing calcination temperature of support. Rare Met. 38, 107–114 (2019). https://doi.org/10.1007/s12598-018-1081-3
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DOI: https://doi.org/10.1007/s12598-018-1081-3