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Controlled pore size of Pt/KIT-6 used for propane total oxidation

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Abstract

Mesoporous silica KIT-6 with different pore sizes was controllably synthesized by hydrothermal methods. The same contents of Pt were loaded on KIT-6 supports to apply for propane total oxidation. Low-angle X-ray diffraction (XRD), nitrogen adsorption–desorption, CO chemisorption and transmission electron microscopy (TEM) were carried out to investigate the physicochemical properties of the catalysts. The results reveal that different pore sizes of KIT-6 supports could affect the Pt particle sizes on KIT-6. The mesopores on KIT-6-80 and KIT-6-130 effectively confine the size of the inside Pt nanoparticles during calcining. Pt/KIT-6-80 with the appropriate pore size as well as the Pt particle size exhibits the best catalytic performance with T 50 (the temperature at which hydrocarbon (HC) conversion reaches 50%) of only 237 °C. However, Pt particles prefer dispersing on the external surface of KIT-6-40 due to those too small pores.

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Acknowledgements

This work was financially supported by the National Key Research and Development Program of China (No. 2016YFC0205000) and the Ministry of Science and Technology of China (No. 2015AA034603).

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Authors and Affiliations

  1. Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China

    Yu-Sheng Chen, Yi-Dan Cao, Rui Ran & Xiao-Dong Wu

  2. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China

    Xiao-Dong Wu & Duan Weng

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  1. Yu-Sheng Chen
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  2. Yi-Dan Cao
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Correspondence to Rui Ran.

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Chen, YS., Cao, YD., Ran, R. et al. Controlled pore size of Pt/KIT-6 used for propane total oxidation. Rare Met. 37, 123–128 (2018). https://doi.org/10.1007/s12598-017-0937-2

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  • DOI: https://doi.org/10.1007/s12598-017-0937-2

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