Abstract The series of magnesia doped CuOxCeO2–δ catalysts were prepared by co-precipitation followed by impregnation method and investigated for CO oxidation. The manuscript is devoted to explaining the role of MgO for the formation of active species on the CuOxCeO2–δ surface. The improvement in catalytic activity ascribed to the formation of various active species due to the interaction of magnesia with CuOxCeO2–δ. The catalysts were characterized by PXRD, N2 adsorption, H2-TPR, XPS, SEM, EDS, HRTEM techniques. The Mg doped catalyst showed lattice expansion of ceria due to the formation of smaller Ce3+ species with oxygen vacancies. The Mg-O bond also take part in CO activation and oxidation, which results increase in CO oxidation. The Mg doped CuOxCeO2–δ catalyst showed improvement in low temperature activity compared to the CuOxCeO2–δ.

中文翻译：

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低温CO氧化中镁相互作用的晶格膨胀和更小的CuO CeO2-δ颗粒形成

摘要 采用共沉淀法和浸渍法制备了一系列氧化镁掺杂的 CuOxCeO2-δ 催化剂，并研究了 CO 氧化。该手稿致力于解释 MgO 在 CuOxCeO2-δ 表面形成活性物质中的作用。催化活性的提高归因于氧化镁与 CuOxCeO2-δ 的相互作用形成了各种活性物质。通过PXRD、N2吸附、H2-TPR、XPS、SEM、EDS、HRTEM技术对催化剂进行了表征。由于形成具有氧空位的更小的 Ce3+ 物种，Mg 掺杂的催化剂显示出二氧化铈的晶格膨胀。Mg-O键还参与CO的活化和氧化，导致CO氧化增加。与 CuOxCeO2-δ 相比，Mg 掺杂的 CuOxCeO2-δ 催化剂在低温活性方面表现出改善。