Abstract In this work, tungsten oxide with different concentrations (0, 0.4 at%, 2.0 at% and 3.2 at%) was introduced to the ceria nanorods via a deposition-precipitation (DP) approach, and copper species of ca. 10 at% were sequentially anchored onto the modified ceria support by a similar DP route. The aim of the study was to investigate the effect of the amount of tungsten oxide (0, 0.4 at%, 2.0 at%, and 3.2 at%) modifier on the copper-ceria catalysts for CO oxidation reaction and shed light on the structure-activity relationship. By the aids of multiple characterization techniques including N2 adsorption, high-resolution transmission electron microscopy (HRTEM), powder X-ray diffraction (XRD), X-ray absorption fine structure (XAFS), and temperature-programmed reduction by hydrogen (H2-TPR) in combination with the catalytic performance for CO oxidation reaction, it is found that the copper-ceria samples maintain the crystal structure of the fluorite fcc CeO2 phase with the same nanorod-like morphology with the introduction of tungsten oxide, while the textural properties (the surface area, pore volume and pore size) of ceria support and copper-ceria catalysts are changed, and the oxidation states of copper and tungsten are kept the same as Cu2+ and W6+ before and after the reaction, but the introduction of tungsten oxide (WO3) significantly changes the metal-support interaction (transfer the CuOx clusters to Cu-[Ox]-Ce species), which delivers to impair the catalytic activity of copper-ceria catalysts for CO oxidation reaction.

中文翻译：

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氧化钨对氧化铈纳米棒支持铜物种作为 CO 氧化催化剂的影响

摘要 在这项工作中，通过沉积-沉淀 (DP) 方法将不同浓度（0、0.4 at%、2.0 at% 和 3.2 at%）的氧化钨和约 通过类似的 DP 途径，10% 原子依次锚定在改性氧化铈载体上。该研究的目的是研究氧化钨（0、0.4 at%、2.0 at% 和 3.2 at%）改性剂对用于 CO 氧化反应的铜-氧化铈催化剂的影响，并揭示其结构 -活动关系。借助N2吸附、高分辨率透射电子显微镜（HRTEM）、粉末X射线衍射（XRD）、X射线吸收精细结构（XAFS）等多种表征技术，