催化作用
甲苯
铂金
金属
化学
电子转移
氧气
纳米材料基催化剂
无机化学
吸附
色散(光学)
化学工程
贵金属
光化学
物理化学
有机化学
工程类
物理
光学
作者
Ruosi Peng,Wen Shu-Xian,Haozhi Zhang,You Zhang,Yuhai Sun,Zheng Liang,Daiqi Ye
出处
期刊:Langmuir
[American Chemical Society]
日期:2024-06-24
卷期号:40 (27): 13984-13994
标识
DOI:10.1021/acs.langmuir.4c01209
摘要
Strong metal–support interaction (SMSI), which has drawn widespread attention in heterogeneous catalysis, is thought to significantly affect the catalytic performance for volatile organic chemical (VOC) abatement. In the present study, strong interactions between platinum and ceria are constructed by modulating the oxygen vacancy concentration of CeO2 through a NaBH4 reduction method. For a catalyst with higher content of oxygen vacancy, more electrons would transfer from ceria to Pt, which is attributed to the stronger effect of SMSI. The obtained electron-richer Pt sites exhibit higher ability for toluene activation, contributing to better performance for toluene oxidation. On the other hand, the stronger metal–support interaction would facilitate CeOx species migrating to the Pt nanoparticle surface and forming an encapsulated structure. Smaller Pt dispersion leads to fewer sites for toluene adsorption and activation, which is to the disadvantage of the reaction. Therefore, taking the negative and positive effects together, the Pt/CeO2-0.5 catalyst has the highest catalytic performance for toluene abatement. Our study provides new insights into strong metal–support interaction on toluene oxidation and contributes to designing noble metal catalysts for VOC abatement.
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