Low-temperature catalytic oxidation of CO over highly active mesoporous Pd/CeO2–ZrO2–Al2O3 catalyst

Xin Liu; Ping Ning; Lisi Xu; Qixian Liu; Zhongxian Song; Qiulin Zhang

doi:10.1039/C6RA05193F

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Low-temperature catalytic oxidation of CO over highly active mesoporous Pd/CeO₂–ZrO₂–Al₂O₃ catalyst†

Xin Liu,^a Ping Ning,^a Lisi Xu,^a Qixian Liu,^a Zhongxian Song^a and Qiulin Zhang*^a

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* Corresponding authors

^a Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, PR China
E-mail: qiulinzhang_kmust@163.com
Tel: +86-871-65170905

Abstract

Mesoporous nano Pd/CeO₂, Pd/CeO₂–ZrO₂ and Pd/CeO₂–ZrO₂–Al₂O₃ catalysts were prepared via a soft template-assisted hydrothermal method and employed in low-temperature catalytic CO oxidation. Almost 100% of CO conversion could be obtained by the optimal Pd/CeO₂–ZrO₂–Al₂O₃ catalyst at 60 °C. Addition of Zr and Al into Pd/CeO₂ lead to an increase of the pore volume, average size of mesopores, the surface Ce³⁺/Ce⁴⁺ atomic ratios and O_adsorbed/O_lattice, while the activation energy (E_a) decreased in the order Pd/CeO₂ (50.4 kJ mol⁻¹) > Pd/CeO₂–ZrO₂ (40.7 kJ mol⁻¹) > Pd/CeO₂–ZrO₂–Al₂O₃ (32.4 kJ mol⁻¹). The low-temperature CO catalytic conversion increased with the decreased activation energy (E_a).

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Article information

DOI: https://doi.org/10.1039/C6RA05193F
Article type: Paper
Submitted: 27 Feb 2016
Accepted: 11 Apr 2016
First published: 13 Apr 2016

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RSC Adv., 2016,6, 41181-41188

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Low-temperature catalytic oxidation of CO over highly active mesoporous Pd/CeO₂–ZrO₂–Al₂O₃ catalyst

X. Liu, P. Ning, L. Xu, Q. Liu, Z. Song and Q. Zhang, RSC Adv., 2016, 6, 41181 DOI: 10.1039/C6RA05193F

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