Effect of copper precursors on CO oxidation catalyzed by CuO-CeO_(2) prepared by solvothermal method  

作　　者：Wen Jin Yanmin Liu Jun Yu Xiaoming Guo Dongsen Mao 

机构地区：[1]School of Chemical and Environmental Engineering,Shanghai Institute of Technology,Shanghai,201418,China

出　　处：《Journal of Rare Earths》2023年第12期1953-1962,I0005,共11页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (21273150)。

摘　　要：In this paper,the CuO-CeO_(2) catalyst was prepared by a direct solvothermal method.The effects of different copper salt precursors(copper nitrate,copper acetate,copper sulfate) on the catalytic performa nce of the prepared catalyst fo r CO oxidation were investigated.The physical and chemical properties of the prepared catalysts were characterized by X-ray diffraction(XRD),Raman spectroscopy,N_(2)physical adsorption,inductively coupled plasma-atomic emission spectrometry(ICP-AES),X-ray photoelectron spectroscopy(XPS),temperature-programmed desorption analysis of CO(CO-TPD),in-situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTs),and temperature-programmed reduction with H_(2)(H_(2)-TPR).The results show that the CuO-CeO_(2)catalyst prepared with copper acetate as precursor(CC-A) exhibits the best catalytic activity for CO oxidation at low temperatures,with T50and T90values of 62 and 78℃ respectively,which is mainly attributed to its large specific surface area,pore volume,CO adsorption capacity,and large amount and strong reactivity of surface oxygen.However,the CuO-CeO_(2) catalyst prepared with copper nitrate as precursor(CC-N) displays better stability and resistance to water or CO_(2) poisoning than CC-A.

关 键 词：Cuo-CeO_(2) Solvothermal method Copper precursor CO oxidation Rare earths 

分 类 号：O643.36[理学—物理化学]