文献类型：期刊文献

英文题名：Highly efficient Ru/CeO2 catalyst using colloidal chemical method for propane oxidation

作者：Yan, Jiaorong[1];Wang, Yunyun[1];Ding, Min[1];Zheng, Xiang[2];Wang, Li[1];Guo, Yun[1];Guo, Yanglong[1];Dai, Qiguang[1];Zhan, Wangcheng[1];Wang, Aiyong[1]

机构：[1]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]Shanghai Inst Technol, Sch Perfume & Aroma Technol, Shanghai 201418, Peoples R China

年份：2024

卷号：500

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20244317251741);WOS:【SCI-EXPANDED(收录号:WOS:001341114000001)】；

基金：This work was supported by the financial support from the National Key Research and Development Program (2022YFB3504200, 2023YFA1508500) , the National Natural Science Foundation of China (22076047, 22376061, 22106101, U21A20326) and Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Propane catalytic oxidation; Colloidal synthesis; Ru-O-Ce interface; Redox property; Surface acidity

摘要：Although supported-Ru catalysts have been widely studied for the light alkane oxidation root in their lower cost compared to Pt and Pd, developing Ru-based catalysts with high efficiency for low-temperature light alkane elimination remains a significant challenge. Herein, Ru/CeO2 catalysts were prepared utilizing the colloidal synthesis (Ru/CeO2-CS) and compared with the catalyst prepared with the traditional impregnation method (Ru/ CeO2-IM) in the textural properties and catalytic propane oxidation. It was discovered that Ru/CeO2-CS sample contained a higher concentration of active Ru- O- Ce interface and oxygen vacancies attributed to the strong Ru-CeO2 interaction, which further enhanced the redox capacity. Besides, the lower valence state of Ru species and higher contents of Lewis acid sites on Ru/CeO2-CS sample boosted the adsorption, dissociation, and activation of propane, thus promoting the deep oxidation of propane to CO2 and H2O. The reaction mechanism of propane oxidation was revealed by in-situ DRIFTS, and both the catalysts showed bands related to acrylate species, suggesting that propane underwent an acrylate oxidation pathway on Ru/CeO2-CS and Ru/CeO2-IM samples. The distinct textural properties of these catalysts resulted in Ru/CeO2-CS synthesized by colloidal methods showing a T 90 of 170 degrees C, and Ea of 50.9 f 1.8 kJ & sdot;mol-1, markedly lower than Ru/CeO2-IM prepared with the traditional impregnation method. Apart from the activity, the Ru/CeO2-CS sample obtained superior water resistance, thermal stability, and durability. This comprehensive work provides promising insights into low-temperature propane oxidation.