Abstract
Pt–HSiW/CeO2 catalysts were prepared for chlorobenzene (CB) catalytic combustion by hydrothermal method at different calcination temperatures, and the effects of the surface acidity and chemical valence on the catalytic activity were investigated. The results show that the catalyst calcined at 450 °C (Cat-B) exhibits the outstanding catalytic performance, and the Cat-B catalyst possesses 90% conversion of CB at 148 °C. The excellent catalytic activity of Cat-B is attributed to more Ce3+/(Ce3+ + Ce4+), Pt0/(Pt0 + Pt2+), Oads/(Olatt + Oads) and Lewis acid sites. The degradation mechanism is proposed based on the analysis of the intermediates with the following reaction pathway: chlorobenzene → phenates/benzoquinone → acetate → maleate → CO2+H2O.
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