Enhancement of toluene oxidation performance over Pt/MnO2@Mn3O4 catalyst with unique interfacial structure
发表时间：2020-03-02
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- 论文类型：
- 期刊论文
- 第一作者：
- Duan, Xiaoxiao
- 通讯作者：
- Qu, ZP (reprint author), Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn, Dalian 116024, Peoples R China.
- 合写作者：
- Qu, Zhenping,Dong, Cui,Qin, Yuan
- 发表时间：
- 2020-02-15
- 发表刊物：
- APPLIED SURFACE SCIENCE
- 收录刊物：
- EI、SCIE
- 文献类型：
- J
- 卷号：
- 503
- ISSN号：
- 0169-4332
- 关键字：
- Pt/MnO2@Mn3O4 catalyst; In situ synthesis; Three-phase interface; Strong metal-support interaction; Toluene oxidation
- 摘要：
- Bi-component MnO2 and Mn3O4 supported Pt catalyst (Pt/MnO2@Mn3O4-I) with low Pt loading (0.25 wt%) was synthesized by a facile in situ liquid-phase reduction strategy. The synchronous reduction of segmental MnO2 and Pt precursor by NaBH4 during the preparation process formed a novel interfacial structure in the catalyst. From the results of XRD, HRTEM and XPS, it was found that Pt nanoparticles were highly dispersed on interface of MnO2@Mn3O4 and the unique three-phase interfacial structure of Pt and MnO2@Mn3O4 existed in Pt/MnO2@Mn3O4-I. Meanwhile, the obtained Pt/MnO2@Mn3O4-I catalyst showed excellent catalytic activity for toluene oxidation, which was better than that of single manganese oxide supported Pt catalysts (Pt/MnO2, Pt/Mn3O4), and toluene could be completely oxidized into H2O and CO2 at 160 degrees C under the weight hourly space velocity (WHSV) of 22500 mL g(-1)h(-1). Higher proportions of Pt-o and fine interaction between Pt and MnO2@Mn3O4 at the interface were responsible for the superior catalytic activity and stability of the catalyst. Thus, it was suggested that the in situ fabrication of bi-component manganese oxides supported Pt catalysts with special interfacial structure was a feasible way to enhance toluene catalytic oxidation performances.
- 是否译文：
- 否
