Effect of MnOx phase on Pt-based catalyst for enhancing CO/C3H6/NO oxidation performance

Enhancement Effect Induced by the Second Metal to Promote Ozone Catalytic Oxidation of VOCs

“…The observed CO band assignments are summarized in Table S4. For the Pt/Mn sample, the IR bands of carbonate species (1326–1581 cm –1 ) are observed after the introduction of CO, which is ascribed to the adsorption of CO 2 produced by the reduction of PtO x species by CO. − Moreover, the carbonation bands are more pronounced than those on the Pt–Ce/Mn catalyst, while Pt–Ce/Mn has a stronger adsorption intensity in the wavelength range of 1700–2143 cm –1 , indicating more exposed sites . There are two prominent peaks at 2090 and 2086 cm –1 on the Pt–Ce/Mn sample, which can be attributed to the adsorption of CO on the partially oxidized Pt and Pt-CeO 2 interface .…”

“…For the Pt/Mn sample, the IR bands of carbonate species (1326−1581 cm −1 ) are observed after the introduction of CO, which is ascribed to the adsorption of CO 2 produced by the reduction of PtO x species by CO. 34−36 Moreover, the carbonation bands are more pronounced than those on the Pt−Ce/Mn catalyst, while Pt−Ce/Mn has a stronger adsorption intensity in the wavelength range of 1700−2143 cm −1 , indicating more exposed sites. 37 There are two prominent peaks at 2090 and 2086 cm −1 on the Pt−Ce/Mn sample, which can be attributed to the adsorption of CO on the partially oxidized Pt and Pt-CeO 2 interface. 38 Interestingly, the blue shift of the CO absorption band from 2094 to 2090 cm −1 also proves that the charge transfer from Pt particles to support leads to the change of its coordination site (consistent with XPS results).…”