Plasma-Assisted Surface Interactions of Pt/CeO2 Catalyst for Enhanced Toluene Catalytic Oxidation

Catalysts

Yufei Tan¹  Bangfen Wang²  Yuhai Sun²  Xueqin Wang²  Daiqi Ye²  Junliang Wu²  Bingxu Chen²  Limin Chen²  Mingli Fu² 

[1] Chinese Research Academy of Environmental Sciences, Beijing 100012, China;School of Environment and Energy, South China University of Technology, Guangzhou 510006, China;

关键词: non-thermal plasma;    Pt/CeO2;    oxygen vacancies;    treatment Sequence;   

DOI  :  10.3390/catal9010002

来源: DOAJ

【 摘 要 】

The performance of plasma-modified Pt/CeO2 for toluene catalytic oxidation was investigated. Pt/CeO2 nanorods were prepared by wet impregnation and were modified by thermal (PC-T), plasma (PC-P), and combined (PC-TP and PC-PT) treatments. The modified catalysts were characterized by TEM (transmission electron microscope), BET (Brunauer-Emmett-Teller), H2-TPR, O2-TPD, XPS, UV-Raman, and OSC tests. The significant variation of the surface morphologies and surface oxygen defects could have contributed to the modification of the Pt/CeO2 catalysts via the plasma treatment. It was found that plasma could promote the surface interaction between Pt and CeO2, resulting in the thermal stability of the catalyst. The Pt-Ce interaction was also conducive to an increase in the number of oxygen vacancies. Furthermore, PC-PT and PC-TP showed a significant difference in oxygen vacancy concentrations and catalytic activities, which illustrated that the treatment sequence (plasma and thermal treatment) affected the performance of Pt/CeO2. The PC-PT sample showed the highest catalytic activity with T100 at 205 °C. This work thus demonstrates that plasma in combined treatment sequences could assist surface interactions of catalysts for enhanced toluene catalytic oxidation.

【 授权许可】

Unknown