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Preparation and Characterization of Carbon Modified Pd-Cu/Palygorskite for Room-Temperature CO Oxidation Under Moisture-Rich Conditions

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Abstract

Pd–Cu/Palygorskite catalysts were prepared by a deposition precipitation method using palygorskite (PC/Pal) and carbon modified palygorskite (PC/Pal-C) as supports, respectively. Their catalytic activities toward CO oxidation at room temperature and in humid circumstances were investigated. It is found that PC/Pal-C exhibits much higher catalytic activity and stability than PC/Pal for room-temperature CO oxidation under moisture-rich conditions. X-ray photoelectron spectroscopy (XPS) and H2-TPR results indicate that the more active Pd2+ and highly dispersed Cu2Cl(OH)3 species present on the PC/Pal-C, which promotes the higher catalytic activity. The thermogravimetric (TG) and water contact angles (CA) results suggest that the slightly enhanced hydrophobicity of PC/Pal-C could properly restrain the moisture condensation on the catalyst surface, which may account for the excellent catalytic stability. The more surface active species and the proper hydrophobicity may be responsible for the excellent catalytic performance of PC/Pal-C.

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Acknowledgements

Authors gratefully acknowledge the financial support from Shanxi provincial key research and development plan project (201603D121018-1); the National Natural Science Foundation of China (21673132); and the Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University).

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Authors and Affiliations

  1. Engineering Research Center of Ministry of Education for Fine Chemicals, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China

    Xiao Li, Yongzhao Wang, Tingting Lv, Yalin Xu & Yongxiang Zhao

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  1. Xiao Li
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  2. Yongzhao Wang
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  3. Tingting Lv
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  4. Yalin Xu
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  5. Yongxiang Zhao
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Correspondence to Yongzhao Wang.

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Li, X., Wang, Y., Lv, T. et al. Preparation and Characterization of Carbon Modified Pd-Cu/Palygorskite for Room-Temperature CO Oxidation Under Moisture-Rich Conditions. Catal Surv Asia 23, 102–109 (2019). https://doi.org/10.1007/s10563-019-09269-1

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