文献类型：期刊文献

英文题名：Surface Al-enrichment induced stabilization of Co3O4 on zeolite for ultra-thermostable catalytic purification of pollutants

作者：Li, Mingqi[1];Ding, Min[1];Tang, Xuan[1];Wang, Li[1];Dai, Qiguang[1];Guo, Yun[1];Zhan, Wangcheng[1];Guo, Yanglong[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

年份：2026

卷号：458

外文期刊名：JOURNAL OF CATALYSIS

收录：;EI(收录号：20261320380534);WOS:【SCI-EXPANDED(收录号:WOS:001733173200001)】；

基金：The authors acknowledge support from the National Key Research and Development Program of China (2022YFB3504200, 2023YFC3707500) , the National Natural Science Foundation of China (U21A20326) , and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Al-enriched structure; Zeolite; CVOCs; Thermal stability

摘要：Co3O4 is an efficient catalyst for catalytic combustion of chlorinated volatile organic compounds, but its application was limited by poor high-temperature resistance. Herein, Co3O4@HZSM-5 catalysts with surface Al-enriched structures were prepared by an in-situ hydrothermal method. Co3O4 particles were able to anchor to these Al species due to its strong interaction, which elevated Co2+ content and oxygen mobility, thus resulting in enhanced catalyst reducibility. Notably, this structure also inhibited sintering of Co3O4 particles at high temperatures, thus preserving robust redox activity. These factors led to the high activity of the Co3O4@HZSM-5 catalysts in CVOCs combustion, even after high temperature aging (i.e. 800 degrees C). On the other hand, the acidity of the catalyst, including both Br & Oslash;nsted and Lewis acidity, was augmented by the addition of HZSM-5. This structure optimized the synergy of oxygen species and acid sites, which contributed to decreasing the selectivity to by-products. This work could provide a promising approach for designing Co3O4-based catalysts with high thermal stability.