Diverse Effects of SO 2 -Induced Pt–O–SO 3 on the Catalytic Oxidation of C 3 H 6 and C 3 H 8

作者：Baojian Zhang, Yuan Yang, Juan Zheng, Dijierui Zhang, Wei Chen, Weidong Yuan, Xiaoping Chen, Rui Liu, Bosheng Chen, Liangwei Li, Limin Shi, Jinlong Wang, Zhu Luo, Yanbing Guo · 发表于：Environmental Science & Technology · 年份：2024 · DOI：10.1021/acs.est.4c04946 · 被引用次数：24 · 研究领域：Catalytic Processes in Materials Science、Catalysis and Oxidation Reactions、Industrial Gas Emission Control

The effects of sulfur dioxide (SO 2 ) in the catalytic purification of short-chain hydrocarbons are still controversial, and the exact role of SO 2 on adsorption and reaction pathways during the catalytic oxidation of different volatile organic compounds (VOCs) remains unclear. Herein, a three-dimensional ordered macroporous Ce 0.8 Zr 0.2 O 2 supported Pt nanoparticle monolithic catalyst (Pt/OM CZO) was synthesized to investigate these effects. Our findings uncover the diverse effects of SO 2: Upon SO 2 treatment, the coupling between the S 3p and Pt 5d orbitals promotes the Pt–O–SO 3 structure in situ formed on the catalyst surface. The propene (C 3 H 6 ) molecule readily binds with the oxygen atom in Pt–O–SO 3, resulting in the accumulation of acetone and carbon deposition, thereby hindering C 3 H 6 oxidation. Conversely, a cleaved oxygen atom within the Pt–O–SO 3 structure enhances propane (C 3 H 8 ) adsorption and activates the C–H bond, facilitating C 3 H 8 oxidation. These insights are pivotal for advancing the frontier of sulfur-tolerant catalysts, addressing both economic and environmental challenges.