DOI number:10.1002/asia.202200947
Affiliation of Author(s):中南大学
Journal:Chemistry - An Asian Journal
Key Words:CeO2; lattice oxygen; PtFe3 bimetal; surface adsorbed oxygen; toluene oxidation
Abstract: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.
Indexed by:Journal paper
Document Code:e202200947
Volume:18
Issue:1
ISSN No.:18614728
Translation or Not:no
Date of Publication:2023-01-03
Included Journals:SCI
Links to published journals:https://aces.onlinelibrary.wiley.com/doi/10.1002/asia.202200947