Efficient Stable Catalysts for Low Temperature Carbon Monoxide Oxidation

Xia, Guanguang; Ye, Yin; Willis, William S.; Wang, J.Y.; Suib, Steven L.

doi:10.1006/jcat.1999.2484

Cited by 185 publications

(73 citation statements)

References 51 publications

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“…The external mass transfer did not limit the conversion rate when the temperature of the catalyst is raised; therefore the coverage of surfaces by CO oxidation will start to decreases. The rate of reaction between the adsorbed CO molecules and the oxygen atoms is relatively fast, even at ambient temperature [39].…”

Section: Effects Of Calcination Timementioning

confidence: 99%

Effect of Preparation Conditions on the Catalytic Activity of CuMnOx Catalysts for CO Oxidation

Dey

Dhal

Прасад

2017

Bull. Chem. React. Eng. Catal.

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The hopcalite (CuMnOx) catalyst is a well-known catalyst for oxidation of CO at ambient temperature. It has prepared by co-precipitation method and the preparation parameters were like Copper/Manganese (Cu:Mn) molar ratios, drying temperature, drying time, calcination temperature and calcination time has an influence on activity of the resultant catalyst. The activity of the catalyst was measured in flowing air calcinations (FAC) conditions. The reaction temperature was increased from ambient to a higher value at which complete oxidation of CO was achieved. The particle size, weight of catalyst and CO flow rate in the air were also influenced by the activity of the catalyst for CO oxidation. The characterizations of the catalysts were done by several techniques like XRD, FTIR, BET, SEM-EDX and XPS. These results were interpreted in terms of the structure of the active catalyst. The main aim of this paper was to identify the optimum preparation conditions of CuMnOx catalyst with respect to the performance of catalyst for CO oxidation.

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Section: Effects Of Calcination Timementioning

confidence: 99%

Effect of Preparation Conditions on the Catalytic Activity of CuMnOx Catalysts for CO Oxidation

Dey

Dhal

Прасад

2017

Bull. Chem. React. Eng. Catal.

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“…When a divalent cation (Mg 2+ ) is substituted for interstitial Cr 3+ in the buserite precursor, Mg-buse(Cr), hydrothermal treatment produces the expected Mg-todo(Cr). [8][9][10][11][12] …”

Section: Influence Of Cr 3+ On Hollandite Formationmentioning

confidence: 99%

“…[8][9][10] Syntheses of hollandite and todorokite can also be designed for isomorphous doping of metal cations into the manganese oxide framework. [9][10][11][12] In a previous communication, we reported the synthesis under hydrothermal conditions of a hollandite-type manganese oxide with Cr 3+ in both interstitial and framework locations. [13] The appearance of Cr-hollandite is unique because divalent and trivalent transition metal cations were previously known only as templates for the todorokite structure.…”

Section: Introductionmentioning

confidence: 99%

Cr-hollandite: Breaking tradition with todorokite-type manganese oxides

2013

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This contribution is dedicated to the memory of Michelle M. Millar, whose talent, generosity, and thoughtfulness touched so many. ABSTRACTThe synthesis of a tunneled hollandite-type manganese oxide with interstitial and framework Cr 3+ is described. This unique material is prepared from a layered buserite precursor under conditions previously believed to only yield todorokite-type manganese oxides with larger tunnels. The influence of Cr 3+ in promoting the hollandite structure has been investigated by selectively placing the cation either in interstitial or framework sites. The use of framework Cr 3+ in combination with other interstitial cations generates related hollandite and todorokite derivatives. Catalytic oxidation reactions with benzyl alcohol and carbon monoxide have also been examined.

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“…The MO xerogel was prepared according to the reported method (Xia et al 1999). An aqueous solution of 1.4 mol (in 20 ml) of sucrose was quickly added to 0.38 mol (50 ml in Double Distilled Water-DDW) of KMnO 4 resulting in a rapid exothermic reaction leading to a brown colored gel formation.…”

Section: Synthesis Of Cds-mo Nanocompositementioning

confidence: 99%

“…, K ? ) and in which water is present in between any two adjacent sheets, and (2) octahedral molecular sieve (OMS) materials constructed by the edge and corner shared octahedral MnO 6 (Ma et al 2006;Suib 2008) that find potential applications in the field of cation-exchange, ion and molecule separation, adsorbents, sensor, battery, catalysis (Ma et al 2006;Suib 2008;Feng et al 1999;Feng 2010), etc., Manganese oxide materials have been used for a wide range of catalytic applications in both synthetic chemistry and environmental problems, such as degradation of dyes, organic pollutants, waste water treatment, nitric oxide reduction, ozone decomposition and selective oxidation of CO (Shen et al 1993;Segal et al 1997;Zhang et al 2006;Chen et al 1997Chen et al , 2001Kannan et al 2011;Xia et al 1999).…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis and catalytic studies of CdS–manganese oxide nanocomposite

Kannan

Karunakaran²,

Vasanthkumar

2011

Appl Nanosci

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Cadmium sulfide (CdS)-manganese oxide (MO) nanocomposite was synthesized by the ion exchange and ultrasonic irradiation methods. The synthesized nanocomposite was characterized by FTIR, powder X-ray diffractrogram (XRD), UV-Vis diffused reflectance spectra (UVDRS), photoluminescence (PL), transmission electron microscope (TEM) and energy dispersive X-ray analysis (EDX). The experimental results confirm the formation of CdS-MO nanocomposite. The luminescence of the nanocomposite exhibits a notable blue shift. The TEM results disclosed the size of the nanocomposite to be within 10-20 nm. The catalytic activity of the nanocomposite was evaluated by the degradation of methylene blue (MB) under visible light.

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Efficient Stable Catalysts for Low Temperature Carbon Monoxide Oxidation

Cited by 185 publications

References 51 publications

Effect of Preparation Conditions on the Catalytic Activity of CuMnOx Catalysts for CO Oxidation

Effect of Preparation Conditions on the Catalytic Activity of CuMnOx Catalysts for CO Oxidation

Cr-hollandite: Breaking tradition with todorokite-type manganese oxides

Facile synthesis and catalytic studies of CdS–manganese oxide nanocomposite

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