A novel shape-controlled Cu_xCe_1-xO₂ nanorods catalyst is synthesized with a simple coprecipitation method at room temperature and Cu(I) chloride as copper sources for the first time. Various analysis methods (XRD Rietveld Refinement, N₂ adsorption-desorption, dynamic OSC, XPS, HRTEM, H₂-TPR and In situ DRIFTs) and catalytic activity test techniques are used to investigate the structural properties and the catalytic performance of the catalysts in CO-PROX. Introducing copper dopant into ceria nanorods has positive effect on enriching the lattice distortion, oxygen vacancy concentration and the lattice oxygen mobility of ceria support. The incorporation of copper ions generates two main types of active copper species that play different roles in CO-PROX. Specifically, the highly dispersed CuO_x species determine the low-temperature CO oxidation activity, while strongly bound Cu-[O_x]-Ce species at the copper-ceria interface regulates the high-temperature CO oxidation activity of the catalyst. Appropriate copper doping (7–11 wt %) is in favor of forming sufficient CuO_x species highly dispersed on the surface of ceria nanorods and accelerating the oxygen mobility, as well as strengthening the copper-ceria interaction in the catalyst, which significantly improves its catalytic activity and broadens the temperature window in CO-PROX.

首次采用简单的共沉淀方法，在室温下以氯化铜为氯化铜，​​首次合成了形状可控的Cu _x Ce _1-x O ₂纳米棒催化剂。各种分析方法（XRD Rietveld精制，N ₂吸附-解吸，动态OSC，XPS，HRTEM，H ₂-TPR和原位DRIFT）和催化活性测试技术用于研究CO-PROX中催化剂的结构性质和催化性能。向二氧化铈纳米棒中引入铜掺杂剂对丰富二氧化铈载体的晶格畸变，氧空位浓度和晶格氧迁移率具有积极作用。铜离子的结合产生两种主要类型的活性铜，它们在CO-PROX中起不同的作用。具体而言，高度分散的CuO _x物种决定了低温CO的氧化活性，而在铜-二氧化铈界面处牢固结合的Cu- [O _x ] -Ce物种则调节了催化剂的高温CO氧化活性。适当的铜掺杂（7-11 wt％）有利于形成足够的CuO_x物种高度分散在二氧化铈纳米棒的表面上并加速了氧的迁移率，并增强了催化剂中铜-二氧化铈的相互作用，从而显着提高了其催化活性并拓宽了CO-PROX的温度范围。