A Comparative Study on the Structure and Catalytic Performance of UiO-66 Supported Pt Nanocatalysts Prepared by NaBH 4 a
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A Comparative Study on the Structure and Catalytic Performance of UiO-66 Supported Pt Nanocatalysts Prepared by NaBH4 and H2 Reduction: Light-Off, Durability and Mechanism for CO Oxidation Zhihua Zhang1 · Xinke Peng3 · Zhongping Zhang1,5 · Weiming Xiao1,2 · Shengjun Deng1,2 · Xuejin Mao4 · Sanguo Hong1 · Chao Chen1,2 · Ning Zhang1,2 Received: 7 March 2020 / Accepted: 19 May 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Metal–organic framework (MOF) supported nanocatalysts are attracting great attentions in heterogeneous catalysis. However, they are still less explored and poorly understood in catalyzing solid–gas reactions. In current work, two MOF supported Pt nanocatalysts were prepared by immersion method coupled with the most commonly used N aBH4 (Pt/UiO-66-NaBH4) and H2 (Pt/UiO-66-H2) reduction, and their catalytic CO oxidation performances were investigated. N aBH4 and H 2 reduction both provide highly dispersed Pt/UiO-66 nanocatalysts, and the two prepared catalysts display excellent CO oxidation activities. Moreover, CO oxidation durability tests reveal that Pt/UiO-66-NaBH4 shows superior durability and structure stability, which are much better than those of Pt/UiO-66-H2. The high structure stability of Pt/UiO-66-NaBH4 also endows it with good H2O and C O2 tolerance. This work attempts to elucidate the influence of reduction methods on the structures and catalytic CO oxidation performances of Pt/UiO-66 catalysts by employing XRD, TEM, N2-sorption, XPS and in situ DRIFTS techniques. Furthermore, the mechanism of CO oxidation was studied by in situ DRIFTS, and the result reveals that the CO oxidation on the two catalysts follows different mechanism. Keywords Metal–organic framework · Pt · CO oxidation · Mechanism
1 Introduction Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10904-020-01597-4) contains supplementary material, which is available to authorized users. * Weiming Xiao [email protected] 1
Key Laboratory of Jiangxi Province for Environment and Energy Catalysis, college of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, People’s Republic of China
2
Institute of Applied Chemistry College of Chemistry, Nanchang University, Nanchang 330031, Jiangxi, People’s Republic of China
3
SPIC Jiangxi Energy Sales, CO., LTD, Nanchang, People’s Republic of China
4
State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, Jiangxi, People’s Republic of China
5
Zhejiang Qicai ECO Technology CO., LTD, Shaoxing, People’s Republic of China
Metal–organic frameworks (MOFs), consisting of metal nodes and organic linkers, are attracting increasing attention in gas storage, energy storage, separation, chemical sensing, drug delivery and catalysis [1–11]. Due to the welldefined porous structure and designability [1, 2, 4], MOFs have been regarded as a class of very promising supports for metal nanocatalysts (Pt, Au, Pd, Ru, etc.), and the MOF supported
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