The Kinetics of Carbon Monoxide Oxidation on Tin(IV) Oxide Supported Platinum Catalysts

Grass, K.; Lintz, H.‐G.

doi:10.1006/jcat.1997.1886

Cited by 77 publications

(50 citation statements)

References 16 publications

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“…On the other hand, it is well known that a good catalyst for CO oxidation should provide the surface sites for simultaneous adsorption of both CO and O 2 . For that reason, platinum deposited on unreduced oxides such as Al 2 O 3 or SiO 2 is usually not very active in the reaction of CO oxidation, contrary to that in which the supports are able to adsorb oxygen, for example: TiO 2 [49], SnO 2 [50] or Fe 2 O 3 [51].…”

Section: Catalytic Activity Of Basno 3 and Pt/basno 3 Catalysts In Oxmentioning

confidence: 99%

CO and H2 oxidation over Pt/BaSnO3 catalysts

Kocemba

Długołęcka

Wróbel-Jędrzejewska

et al. 2017

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This work reports the results of the studies on oxidation of carbon monoxide and H 2 over Pt supported on barium stannate (BaSnO 3 -perovskite type oxide). The composition and properties of Pt/BaSnO 3 catalysts were characterized by X-ray diffraction (XRD), time-of-flight secondary ion mass spectrometry (TOF-SIMS), H 2 and CO chemisorption, scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS) and tested in the reactions of carbon monoxide and hydrogen oxidation. It was stated that platinum strongly interacts with BaSnO 3 . The catalytic activity and adsorption properties of Pt/BaSnO 3 catalysts are determined by these interactions. The presence of different species (which generally can be labelled as [(Pt)BaSnO 3 ]) resulting from platinum and BaSnO 3 chemical interaction was found by the TOF-SIMS on surface of Pt/BaSnO 3 catalysts. The mechanism of CO and H 2 oxidation over Pt/BaSnO 3 catalysts was discussed in the light of strong interactions between Pt and BaSnO 3 .

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Section: Catalytic Activity Of Basno 3 and Pt/basno 3 Catalysts In Oxmentioning

confidence: 99%

CO and H2 oxidation over Pt/BaSnO3 catalysts

Kocemba

Długołęcka

Wróbel-Jędrzejewska

et al. 2017

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“…Pt/SnO 2 catalyst and its modifications were confirmed to be very active in oxidation of CO or CH 4 [15,[22][23][24][25][26][27]. The high catalytic activity of Pt/SnO 2 catalyst is usually explained by the spillover phenomenon [23] or synergism between the oxide and the platinum phases [25,27].…”

Section: Introductionmentioning

confidence: 99%

“…The high catalytic activity of Pt/SnO 2 catalyst is usually explained by the spillover phenomenon [23] or synergism between the oxide and the platinum phases [25,27]. In earlier works [15,22], the formation of SnPt alloy phase was suggested.…”

Section: Introductionmentioning

confidence: 99%

“…In earlier works [15,22], the formation of SnPt alloy phase was suggested. In an additional study [27], the authors assumed that the reaction takes place at the Pt-SnO 2 interface. The last mechanism assumed adsorption of oxygen on the SnO 2 surface followed by its migration to the reaction sites situated at the border between oxide and platinum metal particles.…”

Section: Introductionmentioning

confidence: 99%

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CO oxidation over Pt/SnO2 catalysts

Śmiechowicz

Kocemba

Rogowski

et al. 2018

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The influence of treatment conditions on Pt/SnO 2 properties and its catalytic activity in CO oxidation was investigated. It was found that the temperature and atmosphere of catalyst heating had a great impact on the active phase dispersion, the chemical composition of the surface layer and the O 2 adsorption capacity of the Pt/SnO 2 catalysts. TOF-SIMS analysis and XRD measurements showed that the heat treatment in an atmosphere of H 2 promotes the formation of bimetallic compounds of Pt-Sn and different species such as PtOH, PtO 2 , PtO 2 H, PtOCl, PtSnO, PtSnOH. It was stated that their presence significantly affects the activity of the catalyst in the CO oxidation. The catalyst capacity of O 2 adsorption varied depending on the treatment conditions. The catalyst treated at 600°C in oxygen showed the greatest ability of oxygen adsorption. A significant difference in the activities between the catalyst samples heated in O 2 or H 2 atmosphere was found. The highest activity was obtained for 1%Pt/SnO 2 sample treated in oxygen at 700°C. The treatment in hydrogen above 100°C caused a decrease in the catalyst activity.

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“…The high activity is ascribed to a synergistic bifunctional mechanism in which Pt provides the adsorption sites for CO, while oxygen adsorbs dissociatively on SnO 2 [2,3]. The reaction between the adsorbed species occurs at the Pt/SnO 2 boundary.…”

Section: Introductionmentioning

confidence: 99%

Supercritical deposition of Pt on SnO2-coated Al2O3 foams: Phase behaviour and catalytic performance

Garrido

Patcas

Upper

et al. 2008

Applied Catalysis A: General

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Deposition and reduction of an organometallic platinum complex from a supercritical Pt(COD)Me 2 /CO 2 solution was carried out to produce Pt/ SnO 2 catalysts supported on Al 2 O 3 foams for CO oxidation at moderate temperatures. The phase behaviour of the complex in supercritical carbon dioxide was investigated to find the optimum pressure and temperature conditions for the deposition. For the Pt(COD)Me 2 /CO 2 mixture, the melting point decreased with increasing pressure from 378 K at 0.1 MPa to 360 K at 25.6 MPa. Additional investigations showed that the solubility of Pt(COD)Me 2 in CO 2 increases from 5.9 Â 10 À4 mol/mol at 11.2 MPa and 313 K to 3.4 Â 10 À3 mol/mol at 29.6 MPa and 353 K. The supercritical deposition yielded catalysts with highly dispersed platinum nanoparticles of approx. 3 nm having a narrow size distribution and thus, a superior activity towards oxidation of carbon monoxide in comparison to a catalyst prepared by the conventional aqueous impregnation of Pt. #

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The Kinetics of Carbon Monoxide Oxidation on Tin(IV) Oxide Supported Platinum Catalysts

Cited by 77 publications

References 16 publications

CO and H2 oxidation over Pt/BaSnO3 catalysts

CO and H2 oxidation over Pt/BaSnO3 catalysts

CO oxidation over Pt/SnO2 catalysts

Supercritical deposition of Pt on SnO2-coated Al2O3 foams: Phase behaviour and catalytic performance

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