Catalytic abatement of acetaldehyde over oxide-supported precious metal catalysts

Mitsui, Tomohiro; Tsutsui, Kazuki; Matsui, Toshiaki; Kikuchi, Ryuji; Eguchi, Koichi

doi:10.1016/j.apcatb.2007.09.017

Cited by 50 publications

(14 citation statements)

References 28 publications

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“…Thus, the precious metals in the metallic state should be responsible for the high catalytic activity. We have previously reported that precious metal species on ZrO 2 were stabilized in the reduced state even under an oxidizing atmosphere at 400°C, resulting in the maintenance of high activity for VOC combustion [21,22]. Accordingly, the stability of the reduced-sample can be lower than that of ZrO 2 -supported metal samples, since reduced precious metal species on CeO 2 surface were readily oxidized.…”

Section: Reoxidation Effect Of the Reduced Samplesmentioning

confidence: 93%

“…In the case of Pt/CeO 2 , a remarkable effect of the reduction treatment was observed at lower conversion. For acetaldehyde combustion over Pt/ CeO 2 and Pd/CeO 2 , the activity was also improved by the reduction treatment [22]. The electronic state of precious metal species on CeO 2 was investigated by XPS measurement (Table 3).…”

Section: Ethyl Acetate Combustion and Characterization Of The Reducedmentioning

confidence: 99%

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Low-Temperature Complete Oxidation of Ethyl Acetate Over CeO2-Supported Precious Metal Catalysts

et al. 2009

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Catalytic combustion of ethyl acetate was investigated over various CeO 2 -supported precious metal catalysts prepared by impregnation method, and the effect of reduction treatment on the activity was examined. Among the catalysts tested, Ru/CeO 2 achieved the highest activity for ethyl acetate combustion, and the activity was almost unchanged by the heat treatment in a hydrogen atmosphere. In the cases of Pt/CeO 2 , Pd/CeO 2 , and Rh/ CeO 2 , the catalytic activity was enhanced by the reduction treatment at 400°C, though the activity of the reduced catalysts was still inferior to that of Ru/CeO 2 . It was confirmed by temperature-programmed reduction that the reduction of the ruthenium species was initiated at the lowest temperature among the CeO 2 -supported precious metals. The precious metal species reducible at lower temperatures should be responsible for the high activity in the complete oxidation of ethyl acetate.

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Section: Reoxidation Effect Of the Reduced Samplesmentioning

confidence: 93%

Section: Ethyl Acetate Combustion and Characterization Of The Reducedmentioning

confidence: 99%

Low-Temperature Complete Oxidation of Ethyl Acetate Over CeO2-Supported Precious Metal Catalysts

et al. 2009

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“…One can assume that at the lowest temperatures, hydrogen consumption is associated with the reduction of PtO x oxides. These oxides can be easily reduced even at room temperature [29]. The presence of metallic platinum facilitates the reduction of tin dioxide.…”

Section: Characterization Of Samplesmentioning

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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“…Low temperature (< 573 K) catalytic conversion of ACA to CO 2 and H 2 O is one potential means of removal, as it avoids the finite adsorption capacities and excessive energy inputs associated with conventional physisorption [6] and noncatalytic combustion techniques, respectively. Complete ACA oxidation has been demonstrated over a range of materials, [7,8] with Pt/TiO 2 catalysts shown to achieve 100 % conversion of 10 000 ppm ACA at 498 K. [9] Despite the potential of precious metal-based catalysts, limitations due to their expense and poisoning susceptibility underline the need to identify cheaper, more robust alternatives. Base-metal catalysts have been investigated, in which Cu-, Co-, and Mn-based catalysts were found to demonstrate competitive activity levels for ACA oxidation.…”

Section: Introductionmentioning

confidence: 99%

“…Complete ACA oxidation has been demonstrated over a range of materials, [7,8] with Pt/TiO 2 catalysts shown to achieve 100 % conversion of 10 000 ppm ACA at 498 K. [9] Despite the potential of precious metal-based catalysts, limitations due to their expense and poisoning susceptibility underline the need to identify cheaper, more robust alternatives. Base-metal catalysts have been investigated, in which Cu-, Co-, and Mn-based catalysts were found to demonstrate competitive activity levels for ACA oxidation.…”

Section: Introductionmentioning

confidence: 99%

Probing Surface Properties and Reaction Intermediates During Heterogeneous Catalytic Oxidation of Acetaldehyde

Kydd¹,

Teoh²,

Scott³

et al. 2009

ChemCatChem

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The influence of Cu on various metal oxide supports was investigated for the catalytic oxidation of acetaldehyde (ACA). The activity of the catalysts towards ACA conversion and the CO2 yield decrease in the order: Cu/CeO2>Cu/TiO2≈Cu/ZrO2> Cu/Al2O3>Cu/SiO2. Spontaneous adsorptive conversion of ACA to surface carboxylates, such as bridging and bidentate acetates, was detected over the basic supports CeO2, TiO2, and ZrO2. Detailed temperature‐programmed studies found the high activity of Cu/CeO2 to stem mainly from the intrinsically high activity of the CeO2 support. In contrast, similar studies on Cu/TiO2 demonstrated the activity improvements imparted by Cu were predominantly additive. Despite the difference in origin of ACA oxidation activity over Cu/CeO2 and Cu/TiO2, the overall concerted effects of basicity‐induced carboxylate formation and availability of surface oxygen were thought to be overriding factors crucial in the overall catalytic reactivity.

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Catalytic abatement of acetaldehyde over oxide-supported precious metal catalysts

Cited by 50 publications

References 28 publications

Low-Temperature Complete Oxidation of Ethyl Acetate Over CeO2-Supported Precious Metal Catalysts

Low-Temperature Complete Oxidation of Ethyl Acetate Over CeO2-Supported Precious Metal Catalysts

CO oxidation over Pt/SnO2 catalysts

Probing Surface Properties and Reaction Intermediates During Heterogeneous Catalytic Oxidation of Acetaldehyde

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