Nanostructured MnOx as highly active catalyst for CO oxidation

Frey, Krisztina; Iablokov, Viacheslav; Sáfrán, György; Osán, János; Sajó, István E.; Szukiewicz, R.; Chenakin, S. P.; Kruse, Norbert

doi:10.1016/j.jcat.2011.11.014

Cited by 96 publications

(48 citation statements)

References 28 publications

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“…Furthermore, prospective CO oxidation activity was also shown for manganese oxide [7][8][9][10] and iron oxide catalysts [11][12][13]. Recently, we evaluated a series of ␥-Al 2 O 3 -supported manganese and iron oxide catalysts for the oxidation of CO under O 2 -rich conditions by systematically varying the metal loading as well as preparation procedure [14,15].…”

Section: Introductionmentioning

confidence: 99%

Study on the hydrothermal and SO2 stability of Al2O3-supported manganese and iron oxide catalysts for lean CO oxidation

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Study on the hydrothermal and SO2 stability of Al2O3-supported manganese and iron oxide catalysts for lean CO oxidation

et al. 2015

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“…respiratory protective devices, fuel cells, CO2 laser gas generation, and automobile emission controls, etc. [1][2]. For controlling the pollution by vehicular emissions, the different type of catalysts has been used in the catalytic converter for CO oxidation process.…”

Section: Introductionmentioning

confidence: 99%

Effects of Doping on the Performance of CuMnOx Catalyst for CO Oxidation

Dey

Dhal

Прасад

et al. 2017

Bull. Chem. React. Eng. Catal.

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The rare earth-doped CuMnOx catalysts were prepared by co-precipitation method. The CuMnOx catalyst was doped with (1.5 wt.%) CeOx, (1.0 wt.%) AgOx, and (0.5 wt.%) of AuOx by the dry deposition method. After the precipitation, filtration, and washing process, drying the sample at 110 o C for 16 hr in an oven and calcined at 300 o C temperature for 2 h in the furnace at stagnant air calcination condition. The influence of doping on the structural properties of the catalyst has enhanced the activity of the catalyst for CO oxidation. The doping of noble metals was not affected the crystal structure of the CuMnOx catalyst but changed the planar spacing, adsorption performance, and reaction performance. The catalysts were characterized by Brunauer-Emmett-Teller (BET) surface are, Scanning Electron Microscope Energy Dispersive X-ray (SEM-EDX), X-Ray Diffraction (XRD), and Fourier Transform Infra Red (FTIR) techniques. The results showed that doping metal oxides (AgOx, AuOx, and CeOx) into CuMnOx catalyst can enhance the CO adsorption ability of the catalyst which was confirmed by different types of characterization technique.

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“…The thermal decomposition of 3d-transition metal oxalates has been subject of many investigations during the last decade due to their wide application as precursors for nanosized oxide materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. A special attention is paid to the manganese oxides, which have a wide range of technological application with respect to their magnetic, electric and catalytic properties.…”

Section: Introductionmentioning

confidence: 99%

“…A special attention is paid to the manganese oxides, which have a wide range of technological application with respect to their magnetic, electric and catalytic properties. Sparingly soluble manganese oxalate is an appropriate precursor for their preparation which explains the growing interest to the utilization and investigation of its thermolysis [1][2][3][4][5][6][7][8][9][10][11][17][18][19]. Different in morphology, structure and oxidation state manganese oxides have been obtained by varying the preparation method, nature of solvents and/or using different surfactants at oxalate synthesis, changing the atmosphere, temperature and duration of heat treatment [1-9, 11, 17, 18].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, while the mechanism and products of thermal decomposition of the monoclinic dihydrate in air have been extensively studied by various methods [2,3,7,11,17,[26][27][28][29][30][31][32][33][34][35], the literature data for the other two forms are quite scarce. To the best of our knowledge, apart from our studies [18,19], there are only a few papers about MnC 2 O 4 Á3H 2 O [5,9,36,37] and cMnC 2 O 4 Á2H 2 O [11] and they are not always aimed on the investigation of their decomposition mechanism.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and decomposition mechanism of γ-MnC2O4·2H2O rods under non-isothermal and isothermal conditions

Donkova

Avdeev

2015

J Therm Anal Calorim

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The thermolysis of the ill-known c-MnC 2 O 4 Á 2H 2 O is investigated applying DTA, TG, DSC, FT-IR, SEM, BET and Rietveld XRD phase analyses for thorough characterization of the starting compound and its calcined products. The dehydration proceeds in one step with DH = 149 kJ mol -1 (reported for the first time). Primary decomposition product is Mn 3 O 4 ([Mn 2? Mn 2 3? ]O 4 ) with high specific surface area. During its formation, the oxidation of Mn 3? species to Mn 4? starts, followed by oxidation of Mn 2? -Mn 3? , thus leading to formation of metastable Mn 5 O 8 ([Mn 2 2? Mn 3 4? ]O 8 ) and Mn 2 O 3 . Before complete precursor decomposition under non-isothermal conditions, the reduction of Mn 4? -Mn 3? occurs, forming an additional amount of Mn 3 O 4 . After isothermal annealing of c-MnC 2 O 4 Á2H 2 O in the range of 573-823 K, Mn 3 O 4 is detected as a major product in all samples. Mn 5 O 8 is identified after calcination at 573, 673, 723 K, and its amount decreases gradually in this order. Cubic Mn 2 O 3 appears after heat treatment at 673 K; its content varies between 13 and 23 % in the range of 673-773 K and becomes close to that of Mn 3 O 4 at 823 K. The application of the same experimental conditions as in the investigation of a-MnC 2 O 4 Á2H 2 O and MnC 2 O 4 Á3H 2 O allows an objective comparison of the nature and the peculiarities of the thermal decomposition of different crystal forms of manganese oxalate.

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Nanostructured MnOx as highly active catalyst for CO oxidation

Cited by 96 publications

References 28 publications

Study on the hydrothermal and SO2 stability of Al2O3-supported manganese and iron oxide catalysts for lean CO oxidation

Study on the hydrothermal and SO2 stability of Al2O3-supported manganese and iron oxide catalysts for lean CO oxidation

Effects of Doping on the Performance of CuMnOx Catalyst for CO Oxidation

Synthesis and decomposition mechanism of γ-MnC2O4·2H2O rods under non-isothermal and isothermal conditions

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