文献类型：期刊文献

中文题名：Performance of mesoporous CeO_(2)-Cr_(2)O_(3)mixed metal oxides applied to benzene catalytic combustion

作者：Na Ye[1];Jie Zheng[1];Kaiyuan Xie[1];Baishun Jiang[1];Shufeng Zuo[1]

机构：[1]Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process,Shaoxing University,Shaoxing 312000,China

年份：2023

卷号：41

期号：6

起止页码：889

中文期刊名：稀土学报:英文版

外文期刊名：Journal of Rare Earths

收录：CSTPCD、、Scopus、CSCD2023_2024、CSCD

基金：Project supported by the National Natural Science Foundation of China(21577094);Zhejiang Public Welfare Technology Research Project(LGG19B070003).

语种：英文

中文关键词：Ce,Cr)-MOF;CeO_(2)-Cr_(2)O_(3);Structural-activity relationship;Catalytic performance;Benzene combustion;Rare earths

中文摘要：In this paper,a hydrothermal method was used to prepare(Ce,Cr)-MOF with different Ce/Cr molar ratios and then a series of CeO_(2)-Cr_(2)O_(3)mixed metal oxides(CeCr-MMO)with mesoporous structure were prepared by thermal decomposition of these MOFs at different temperatures.After a series of characterization techniques were applied to test the physicochemical properties of the materials,it is found that thermal decomposition temperature(TDT)and Ce/Cr molar ratios have important effects on the structure and performance of CeCr-MMO.As the TDT reaches 400℃and above,(Ce,Cr)-MOF can be completely decomposed to form CeCr-MMO.The catalyst with Ce/Cr molar ratio of 4:1 has the highest catalytic activity,which can completely degrade benzene at 230℃.It is concluded that the interaction between CeO_(2)and Cr_(2)O_(3)is helpful for increasing the concentration of Ce^(3+),Cr^(6+)and lattice oxygen species(OLatt)on the catalyst surface,thus improving the catalytic performance.Moreover,CeCr(4:1)-MMO-400 shows excellent durability against the presence of chlorobenzene and H2O during 100 h continuous reaction.