Determination of dispersion of precious metals on CeO2-containing supports

DRIFTS investigation and DFT calculation of the adsorption of CO on Pt/TiO2, Pt/CeO2 and FeOx/Pt/CeO2

“…The CO adsorbed on Pt/CeO 2 gave an intense peak at 1628 cm −1 . The unmarked peaks in the range of 1600-1250 cm −1 could be assigned to adsorbed carbonate species as reported in the literatures [16,17]. Fig.…”

“…According to the literatures [16][17][18][19][20], the two peaks at 1857 and 1809 cm −1 in Fig. 1 are assigned to the vibration mode of the bridge CO which may be bonded with the pair sites such as Pt-Pt and Pt-Ti.…”

“…1 is assigned to linearly adsorbed CO on Pt atoms in the literatures [16][17][18][19][20]. To confirm the assignment of CO linearly adsorbed on Pt/TiO 2 , we designed the calculated models G-J (see Fig.…”

An Experimental and Kinetic Modelling Study for Methane Oxidation over Pd-based Catalyst: Inhibition by Water

“…Prior to the measurement, the sample was subjected to a thermal pre-treatment which involved a reduction at 500 °C under 2% H 2 in Ar flow for 30 min followed by fast cooling to 25 °C in the same gas flow. After flushing with Ar flow for 10 min, the sample was exposed to a mixture of 100 ppm CO and 0.5% CO 2 (to avoid CO adsorption on ceria [34]) in Ar for 20 min to measure the CO adsorption. Physisorbed CO was then flushed away with 0.5% CO 2 in Ar for 10 min and a second pulse of 100 ppm CO and 0.5% CO 2 was performed to quantify the weakly bonded CO.…”

Preparation and NO reduction property of apatite-type ALa₉Si₆O₂₆ (A = Li, Na, K) supported Pt catalyst

“…The dispersion of Pt on the catalysts was evaluated by the CO pulse adsorption method reported by Takeguchi et al 18) A quartz tube reactor was loaded with 0.5 g of catalyst. The catalyst was heated to 400°C at 10°C/min and held for 10 min in flowing air at 100 cm 3 /min.…”