文献类型：期刊文献

英文题名：A facile BaSO? surface coated Mn/Barium slag-ZSM–5 bifunctional catalyst with enhanced SO2 resistance for NO oxidation: a dual-protection mechanism

作者：Wu, Yadong Li, JinJuan

第一作者：Wu, Yadong

机构：[1] College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550003, China; [2] School of Artificial Intelligence and Electrical Engineering, School of Chemical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550003, China

通信机构：College of Resources and Environmental Engineering, Guizhou University, Guiyang, 550003, China

年份：2026

卷号：61

期号：20

起止页码：13824-13842

外文期刊名：Journal of Materials Science

收录：EI(收录号：20261520466940)

语种：英文

外文关键词：Barium sulfate - Catalyst poisoning - Catalyst supports - Catalytic oxidation - Density functional theory - Hazardous materials - Oxidation resistance - Redox reactions - Sieves - Silicate minerals - Sulfur - Sulfur compounds - Waste utilization

摘要：The development of molecular sieve designs capable of achieving high catalytic efficiency in the oxidation of NO to NO? while exhibiting notable SO? resistance remains a significant scientific and technological challenge. Barium slag (Bs) is abundant in silicates, aluminosilicate minerals, and various active elements (e.g., Fe and Ba), which serve as indispensable precursor for the synthesis of molecular sieves. In this study, a Mn-based bifunctional catalyst supported on Bs–ZSM–5 (designated as MF@BsZx) was successfully synthesized. This catalyst not only facilitates the oxidation of NO but also exhibits resistance to SO? poisoning, consequently enhancing its operational durability and applicability. The primary characterization techniques, including the combination of NO temperature-programmed reduction (NO-TPR) and density functional theory (DFT), were employed to achieve a more in-depth comprehension of the mechanisms underlying NO oxidation and SO? resistance. The in situ encapsulation of Mn and Fe species within the Bs–ZSM–5 zeolite promoted the close interaction between acidic and redox-active sites, thereby accelerating the oxidation kinetics of the generated intermediate species. The ample Br?nsted acid sites (Mn4?–O?–Fe3? interfacial sites) promoted the cleavage of O=O bonds and the formation of O–N=O bonds. The preferential adsorption of SO? onto barium ions, coupled with the formation of a protective barium sulfate layer, functions to preclude the internal catalytic components from corrosion. This research offers a valuable reference for the high-value utilization of hazardous waste and for resolving the scientific challenges related to molecular sieves sulfur poisoning. ? The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2026.