文献类型：期刊文献

英文题名：Robust Ru/Ce@Co Catalyst with an Optimized Support Structure for Propane Oxidation

作者：Wang, Aiyong[1];Ding, Jiajia[1];Li, Mingqi[1];Song, Peiyao[1];Zhao, Zhiyuan[1];Guo, Yanglong[1];Guo, Yun[1];Wang, Li[1];Dai, Qiguang[1];Zhan, Wangcheng[1,2]

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]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai 200237, Peoples R China

年份：2024

卷号：58

期号：28

起止页码：12742

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20242816672467);WOS:【SCI-EXPANDED(收录号:WOS:001265068300001)】；

基金：N.Z. and W.Z. acknowledge the financial support from the National Key Research and Development Program (2022YFB3504200, 2023YFA1508500) and the National Natural Science Foundation of China (22076047, 22376061, 22106101). Y.G. acknowledges the National Natural Science Foundation of China (U21A20326) and Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：propane oxidation; ruthenium catalyst; ceriumoxide; support effect; oxidation mechanism

摘要：Short carbon chain alkanes, as typical volatile organic compounds (VOCs), have molecular structural stability and low molecular polarity, leading to an enormous challenge in the catalytic oxidation of propane. Although Ru-based catalysts exhibit a surprisingly high activity for the catalytic oxidation of propane to CO2 and H2O, active RuOx species are partially oxidized and sintered during the oxidation reaction, leading to a decrease in catalytic activity and significantly inhibiting their application in industrial processes. Herein, the Ru/Ce@Co catalyst is synthesized with a specific structure, in which cerium dioxide is dispersed in a thin layer on the surface of Co3O4, and Ru nanoparticles fall preferentially on cerium oxide with high dispersity. Compared with the Ru/CeO2 and Ru/Co3O4 catalysts, the Ru/Ce@Co catalyst demonstrates excellent catalytic activity and stability for the oxidation of propane, even under severe operating conditions, such as recycling reaction, high space velocity, a certain degree of moisture, and high temperature. Benefiting from this particular structure, the Ru/Ce@Co (5:95) catalyst with more Ce3+ species leads to the Ru species being anchored more firmly on the CeO2 surface with a low-valent state and has a strong potential for adsorption and activation of propane and oxygen, which is beneficial for RuOx species with high activity and stability. This work provides a novel strategy for designing high-efficiency Ru-based catalysts for the catalytic combustion of short carbon alkanes.