中南大学
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返回首页Capture-bonding Super Assembly of Nanoscale Dispersed Bimetal on Uniform CeO2 Nanorod for the Toluene Oxidation
发布时间：2024-09-30
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- DOI码：
- 10.1002/asia.202200947
- 所属单位：
- 中南大学
- 发表刊物：
- Chemistry - An Asian Journal
- 关键字：
- CeO2; lattice oxygen; PtFe3 bimetal; surface adsorbed oxygen; toluene oxidation
- 摘要：
- Elimination of VOCs by catalytic oxidation is an important technology. Here, a general synergistic capture-bonding superassembly strategy was proposed to obtain the nanoscale dispersed 5.8% PtFe3−CeO2 catalyst, which showed a high toluene oxidation activity (T100=226 °C), excellent catalytic stability (125 h, >99.5%) and a good water resistance ability (70 h, >99.5%). Through the detailed XPS analysis, oxygen cycle experiment, hydrogen reduction experiment, and in-situ DRIFT experiment, we could deduce that PtFe3−CeO2 had two reaction pathways. The surface adsorbed oxygen resulting from PtFe3 nanoparticles played a dominant role, due to the fast cycling between the surface adsorbed oxygen and oxygen vacancy. In contrast, the lattice oxygen resulting from CeO2 nanorods played an important role due to the relationship between the toluene oxidation activity and the metal-oxygen bonding energy. Furthermore, DFT simulation verified Pt sites were the dominant reaction active sites during this reaction.
- 论文类型：
- 期刊论文
- 论文编号：
- e202200947
- 卷号：
- 18
- 期号：
- 1
- ISSN号：
- 18614728
- 是否译文：
- 否
- 发表时间：
- 2023-01-03
- 收录刊物：
- SCI