Metal support interaction of defective-rich CuO and Au with enhanced CO low-temperature catalytic oxidation and moisture resistance

Advanced Powder Materials Pub Date : 2023-10-01 DOI:10.1016/j.apmate.2023.100119

Yahang Wang , Lujun Zhu , Jingwei Li , Weibin Zhang , Xianjin Shi , Yu Huang , Mirabbos Hojamberdiev , Gangqiang Zhu

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引用次数: 5

Abstract

Water is considered to be an inhibitor of CO oxidation. The mechanism of retarding the reaction is thought to contribute to the practical application of CO oxidation, which is investigated by constructing the coupling of Au nanoparticles and defective CuO to form metal-support interactions (MSI) and oxygen vacancies (OVs). The introduction of Au forms a new CO adsorption site, which successfully solves the competitive adsorption problem of CO with H₂O and O₂. Due to the coupling of MSI and OVs, the reduced ability of catalyst and the activation and migration ability of oxygen are enhanced simultaneously. Au-CuO has the ability to oxidize CO at room temperature with high stability under a humid environment. Theoretical calculation confirmed the competitive adsorption and the influence of MSI and OVs coupling on the catalyst performance. The mechanism of water resistance in CO catalytic oxidation was also explained.

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富缺陷CuO和Au的金属支撑相互作用与CO低温催化氧化和抗湿性增强

水被认为是CO氧化的抑制剂。通过构建Au纳米颗粒和缺陷CuO的偶联物，形成金属-载体相互作用（MSI）和氧空位（OVs），研究了延缓反应的机理，认为这有助于CO氧化的实际应用。Au的引入形成了一个新的CO吸附位点，成功地解决了CO与H2O和O2的竞争吸附问题。由于MSI和OVs的偶联，催化剂的还原能力和氧的活化迁移能力同时增强。Au-CuO在室温下具有氧化CO的能力，在潮湿环境下具有高稳定性。理论计算证实了竞争吸附以及MSI和OVs偶联对催化剂性能的影响。并对CO催化氧化中的耐水性机理进行了解释。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Advanced Powder Materials

CiteScore

33.30

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0.00%

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