Promote the efficient co-combustion of toluene & CO in Pt/CeO2 catalyst: Orientally adjusting the oxidized SMSI to optimize acid site and oxygen vacancy

By effectively controlling the strong metal -support interaction (SMSI), the formation of acid sites and oxygen vacancies (O v ) on the Pt/CeO 2 catalyst was optimized. The efficient co -combustion of toluene and CO on Pt/ CeO 2 -450 was achieved. In the dual -pollutant system, when the conversion rate was 90 %, the corresponding conversion temperatures of toluene and CO were 165 degrees C and 173 degrees C, respectively. With the increase of SMSI, the catalytic activity of Pt/CeO 2 showed a trend of first increase and then decrease. This was proportional to the content of weak acid sites, medium acid sites, and O v generated on their surfaces. Compared with the combustion of a single pollutant, the result displays that toluene and CO had significant competitive adsorption on Pt/CeO 2 . The inhibition of toluene on CO also showed the same trend as the catalytic activity with the increase of SMSI. Under the double inhibition, Pt/CeO 2 exhibited preferential selectivity for toluene combustion. However, the in situ DRIFTS results showed that this competitive adsorption phenomenon did not interfere with the combustion reaction path. The co -combustion of toluene and CO follows independent reaction paths. This work provides valuable insights and ideas for realizing the development of efficient and environmentally friendly catalysts through SMSI regulation.