This work brings a thorough investigation of hydrothermally derived ceria nanoparticles doped with copper in a wide range of concentrations: Cu_xCe_1-xO₂, where x = 0, 0.1, 0.2, 0.3, 0.4, and 0.5, respectively. X-ray diffraction (XRD) analysis showed no additional phases for all samples up to x = 0.4, which exceeds the maximum amount of copper incorporated into ceria without the appearance of copper oxide phase reported in the literature. However, the inductively coupled plasma mass spectrometry (ICP-MS) and energy-dispersive X-ray spectroscopy (EDS) analyses showed that copper is incorporated into the ceria crystal lattice in amounts far lower than the nominal. Nevertheless, the addition of copper has a significant influence on the ceria properties. The size of the obtained nanoparticles was determined by transmission electron microscopy (TEM) and it decreases with the increase of the copper amount from 6 nm for the pure sample to 3.8 nm for the 40 mol. % Cu-doped CeO₂ sample. In accordance with the small particle size, the specific surface area, determined from nitrogen adsorption–desorption isotherms at 77 K, is in the range of 196 to 222 m² g⁻¹. The increase in the copper amount also causes the reduction of the band gap, as determined by UV–Vis reflectance analysis (UV–Vis DRS), and an increase of reducibility, as proven by temperature-programmed reduction by hydrogen (H₂-TPR).

这项工作对水热衍生的氧化铈纳米粒子进行了深入研究，这些纳米粒子掺杂了各种浓度的铜：Cu _x Ce _1-x O ₂，其中x 分别为 0、0.1、0.2、0.3、0.4 和 0.5。X 射线衍射 (XRD) 分析表明，所有样品都没有额外的相，直到x = 0.4，超过文献中报道的在没有氧化铜相出现的情况下掺入氧化铈中的最大铜量。然而，电感耦合等离子体质谱 (ICP-MS) 和能量色散 X 射线光谱 (EDS) 分析表明，铜结合到氧化铈晶格中的数量远低于标称值。然而，铜的添加对氧化铈的性能有显着影响。通过透射电子显微镜（TEM）测定所得纳米颗粒的尺寸，随着铜量的增加，其尺寸从纯样品的 6 nm 增加到 40 mol 的 3.8 nm。% Cu掺杂的CeO ₂样本。根据小粒径，比表面积由 77 K 下的氮吸附-解吸等温线确定，在 196 至 222 m ²  g ^-1的范围内。铜量的增加也会导致带隙的减小，如紫外-可见光反射分析 (UV-Vis DRS) 所确定的，以及还原性的增加，如氢 (H ₂ -TPR) 的程序升温还原所证明的）。