Carbon monoxide oxidation on copper manganese oxides prepared by selective etching with ammonia

Shi, Lei; Hu, Zhen-Hao; Deng, Gao‐Ming; Li, Wen‐Cui

doi:10.1016/s1872-2067(15)60947-0

Cited by 17 publications

(1 citation statement)

References 38 publications

(38 reference statements)

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“…In the above methods, the co-precipitation method can produce the highly active sites of the CuMnOx catalyst [19,20]. A co-precipitation method is used for the preparation of CuMnOx catalyst with a full range (Cu:Mn) in a CuMnOx solution, and after the precipitation conditions, the (Cu:Mn) ratio of the final catalyst is very similar to the (Cu 2+ : Mn 2+ ) ratio in the starting solutions [10,21]. There are many things, which can be varied during the catalyst preparation by co-precipitation method and the subsequent calcination step for controlling the performance of catalyst for CO oxidation [22].…”

Section: Introductionmentioning

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: Introductionmentioning

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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MnO₂‐Based Materials for Environmental Applications

et al. 2021

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Manganese dioxide (MnO2) is a promising photo–thermo–electric‐responsive semiconductor material for environmental applications, owing to its various favorable properties. However, the unsatisfactory environmental purification efficiency of this material has limited its further applications. Fortunately, in the last few years, significant efforts have been undertaken for improving the environmental purification efficiency of this material and understanding its underlying mechanism. Here, the aim is to summarize the recent experimental and computational research progress in the modification of MnO2 single species by morphology control, structure construction, facet engineering, and element doping. Moreover, the design and fabrication of MnO2‐based composites via the construction of homojunctions and MnO2/semiconductor/conductor binary/ternary heterojunctions is discussed. Their applications in environmental purification systems, either as an adsorbent material for removing heavy metals, dyes, and microwave (MW) pollution, or as a thermal catalyst, photocatalyst, and electrocatalyst for the degradation of pollutants (water and gas, organic and inorganic) are also highlighted. Finally, the research gaps are summarized and a perspective on the challenges and the direction of future research in nanostructured MnO2‐based materials in the field of environmental applications is presented. Therefore, basic guidance for rational design and fabrication of high‐efficiency MnO2‐based materials for comprehensive environmental applications is provided.

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Cu−Mn Hydroxyapatite Materials for Toluene Total Oxidation

et al. 2019

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The oxidation of 800 ppmv toluene in air has been investigated over CuMnOx ((Cu+Mn) loading: 10 wt%) dispersed on hydroxyapatite (Hap: Ca5(PO4)3(OH)) with different molar Cu/Mn compositions (2; 1; 0.5) to be compared with the corresponding supported single transition metal oxide catalysts. The solids have been prepared by wet aqueous co‐impregnation method followed by a calcination at 400 °C for 4 h and physicochemically characterized by different techniques. The catalytic performances of the supported Cu−Mn oxide catalysts revealed the existence of a synergetic effect in terms of activity and selectivity towards CO2 through the formation of Cu−Mn mixed oxides. The strongest synergetic effect is observed for a Cu/Mn molar ratio of 2 as confirmed by the standardized conversion rate values determined at 190 °C (r190) which followed the decreasing sequence (/10−2 h−1): Cu2MnHap (2.57)>CuMnHap (2.04)>CuMn2Hap (1.59)>MnHap (1.13)>CuHap (0.13). The highest activity of Cu2MnHap can be explained by a better reducibility of the active phase in line with a high density of Cu‐O−Mn interactions at the outermost layers as shown by ToF‐SIMS results.

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Carbon monoxide oxidation on copper manganese oxides prepared by selective etching with ammonia

Cited by 17 publications

References 38 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

MnO₂‐Based Materials for Environmental Applications

Cu−Mn Hydroxyapatite Materials for Toluene Total Oxidation

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Carbon monoxide oxidation on copper manganese oxides prepared by selective etching with ammonia

Cited by 17 publications

References 38 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

MnO2‐Based Materials for Environmental Applications

Cu−Mn Hydroxyapatite Materials for Toluene Total Oxidation

Contact Info

Product

Resources

About

MnO₂‐Based Materials for Environmental Applications