Effect of reduction treatment on CO oxidation over Pt/SnO2 catalyst

Yamaguchi, Nobutada; Kamiuchi, Naoto; Muroyama, Hiroki; Matsui, Toshiaki; Eguchi, Koichi

doi:10.1016/j.cattod.2010.12.036

Cited by 27 publications

(26 citation statements)

References 24 publications

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“…Besides, the interdiffusion of metal ions occurs at the interface of Pt/SnO x during reduction at high temperatures, resulting in the formation of intermetallic compounds (PtSn, Pt 3 Sn, etc.) [1,2,4,5]. Thus, in the present study, the reduction treatment at 200 • C gave rise to the diffusion of hydrogen and metal elements into constituent materials.…”

Section: Resultsmentioning

confidence: 75%

“…Moreover, many efforts have been devoted to their characterization to elucidate the microstructure, electronic state, adsorption property of reaction gas and so on, because these characteristics strongly affect the catalytic activity. We have focused on platinum catalyst supported on tin oxide (Pt/SnO 2 ) for the combustion of chemicals and the electrochemical reaction in polymer electrolyte fuel cells [1][2][3]. The microstructural changes in this catalyst induced by reduction and oxidation treatments were also noticeable [4,5].…”

Section: Introductionmentioning

confidence: 98%

“…Moreover, the electronic state of Pt varied in response to these structural changes. It was concluded that the catalytic activity of Pt/SnO 2 for CO and VOC oxidation was strongly affected by the microstructure at the Pt-SnO 2 interface and the electronic state of Pt species [1,2].…”

Section: Introductionmentioning

confidence: 99%

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Influences of heat-treatment and measurement atmosphere on the electrochemical property of Pt–SnO device

et al. 2015

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Section: Resultsmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 98%

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Influences of heat-treatment and measurement atmosphere on the electrochemical property of Pt–SnO device

et al. 2015

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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. In an additional study [27], the authors assumed that the reaction takes place at the Pt-SnO 2 interface.…”

Section: Introductionmentioning

confidence: 99%

CO oxidation over Pt/SnO2 catalysts

Śmiechowicz

Kocemba

Rogowski

et al. 2018

Reac Kinet Mech Cat

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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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Formation of Intermetallic Compounds by Reactive Metal–Support Interaction: A Frequently Encountered Phenomenon in Catalysis

2014

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This Review discusses the structural and catalytic aspects of the recently introduced reactive metal-support interaction. This special term was coined to account for the inability of the original concept of the strong metal-support interaction to accurately describe the structural, compositional, and electronic changes frequently occurring in oxide-supported metal particle catalysts at very high temperatures upon reduction in hydrogen, in many cases leading to intermetallic compound or substitutional alloy formation. This inaccuracy predominantly refers to the requirement of full reversibility upon oxidation and mild reduction for a strong metal-support interaction. A close look at the formation of oxide-supported intermetallic compounds upon high-temperature reduction reveals that these compounds are very common in catalysis and the situation is much more complex compared to unsupported intermetallic compounds due to the presence of the intermetallic compound-oxide interface

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Effect of reduction treatment on CO oxidation over Pt/SnO2 catalyst

Cited by 27 publications

References 24 publications

Influences of heat-treatment and measurement atmosphere on the electrochemical property of Pt–SnO device

Influences of heat-treatment and measurement atmosphere on the electrochemical property of Pt–SnO device

CO oxidation over Pt/SnO2 catalysts

Formation of Intermetallic Compounds by Reactive Metal–Support Interaction: A Frequently Encountered Phenomenon in Catalysis

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