Low-temperature complete oxidation of CO over various manganese oxide catalysts

Dey, Subhashish; Dhal, Ganesh Chandra; Mohan, Devendra; Прасад, Рам

doi:10.1016/j.apr.2018.01.020

Cited by 59 publications

(14 citation statements)

References 31 publications

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“…The more conclusively attribute these changes to alloying with Pd by showing that the magnitude of changes in the bimetallic nanoparticles was much greater than changes associated with particle size effects or differing metal-support interactions. The in situ CO can make significant structural changes to Pd-Au nanoparticles, with the strong Pd-CO interactions providing a driving force to draw Pd to the nanoparticle surface (Dey et al 2018c). This is consistent with the net electron transfer from Pd to Au observed in CO binding experiments.…”

Section: Co G ð þ→Co Ads ð4þsupporting

confidence: 76%

Highly Active Palladium Nanocatalysts for Low-Temperature Carbon Monoxide Oxidation

Dey

Dhal

2019

Polytechnica

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The noble metal catalysts are most commonly considered to be used in an automobile as a catalytic converter. Palladium (Pd) is a highly active catalyst for carbon monoxide (CO) oxidation in platinum group metals. It is very active for low-temperature CO oxidation if dispersed on suitable metal oxides and composite oxides. The oxidized Pd metal nanocatalyst has been applied more actively than the completely reduced particles. The performance of Pd oxide nanocatalysts strongly depends upon the surface structure, number of active sites and various Pd-O interactions. Palladium is an ideal catalyst not only for the automobile industry through cross-coupling reactions but also for low-temperature catalytic oxidation of CO. The Pd metal is more resistant for sulfur and potassium poisoning, and they are chemically sensitive and degraded rapidly in the presence of fuel impurities. The higher activity of Pd nanocatalyst was attributed to the small particle size and higher dispersion over Pd support. The chemisorptions of CO on Pd catalysts were studied in this review. The results obtained from this study will provide the scientific basis for the future design of Pd-based oxidation catalysts.

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Section: Co G ð þ→Co Ads ð4þsupporting

confidence: 76%

Highly Active Palladium Nanocatalysts for Low-Temperature Carbon Monoxide Oxidation

Dey

Dhal

2019

Polytechnica

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“…4 can also appear because they are very sensitive to the stoichiometry of reactant elements in their synthesis at the heating and cooling rates. The reason behind for increases the catalytic activity due to an improved specific surface area, lattice oxygen mobility and pore volume of the catalysts (Automobile and carbon monoxide, n.d.; Dey et al, 2017a;Dey et al, 2017b;Dey et al, 2017c;Dey et al, 2017d;Dey et al, 2018a;Dong et al, 2015;Dey et al, 2018b;Singh & Prasad, 2014;Solsona et al, 2004;Toyoshima et al, 2013;Goodman et al, 2007; (Cotton, 2013) 2009; Adeyemo et al, 2011;Teoh et al, 2015;Chen & Lin, 2015;Cominos et al, 2005;Snytnikov et al, 2003;Nehasil et al, 1996;Zhang et al, 2014;Hebben et al, 2010;Gao et al, 2013;Hulteberg et al, 2005;Wong et al, 2014;Dulaurent et al, 2000;Jung et al, 2007;Nishibayashi et al, 1997;Goerke et al, 2004;Brewster et al, 2014;Piccolo et al, 2016;Dey & Dhal, 2020a;Filot et al, 2011;Saadatjou et al, 2014;Song et al, 2004;Olveira et al, 2014).…”

Section: Characteristics and Structure Of Rhodium Nanocatalystsmentioning

confidence: 99%

“…The performance of catalytic converter is strongly depending upon the types of catalyst was used. In the presence of catalyst the rate of chemical reaction was increased, it acts like an agent that reduces the activation energy of the reactions (Dey et al, 2018a). The efficiency of catalytic converter is highly depending upon the temperature.…”

Section: Introductionmentioning

confidence: 99%

Applications of Rhodium and Ruthenium Catalysts for CO Oxidation: an Overview

Dey

Dhal

2020

Polytechnica

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The rhodium (Rh) and ruthenium (Ru) are very important catalytic materials in various oxidation reactions. It is the best monometallic catalyst for oxidation of carbon monoxide (CO) and practically used in residential catalytic converters. These catalysts are active for CO oxidation at a low temperature. The activity of Ru/Rh catalysts is strongly dependent on the surface area, pore volume and textural properties of designed catalysts. It could be used as an ideal candidate not only for automobile industry through the cross-coupling reactions but also for low-temperature catalytic oxidation of CO. The chemisorptions of CO over Ru/Rh catalysts and supported catalysts were studied in this review. These studies will provide the scientific basis for future design of Ru/Rh oxidation catalysts. Both Ru and Rh are minor metals and supply risk often increases the price. However, the performance improved and cost-reduced nanoparticles of Rh/Ru system are reviewed by this work.

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“…In this context, manganese oxide base materials are an alternative, since by changing the synthesis parameters it is possible to modulate several characteristics: structure, composition, morphology, and electrical conduction [1][2][3], among others. ese features allow designing materials with applications in the primary and secondary batteries [4], supercapacitors [5], catalytic processes [5][6][7], and the degradation of dyes [8], among others. A recent critical review [9] accounts for the environmental catalytic applications of the Mn-based oxides and recognizes them as one of the most promising catalysts.…”

Section: Introductionmentioning

confidence: 99%

Decomposition of the Methylene Blue Dye Using Layered Manganese Oxide Materials Synthesized by Solid State Reactions

Becerra

Suárez

Arias

et al. 2018

International Journal of Chemical Engineering

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The modulation in the synthesis parameters of layered manganese oxides allowed us to produce materials with different AC conductivities. These conductivities were correlated with the catalytic performance of the materials in the decomposition of methylene blue, as a model of electron transfer reactions. The manganese oxides were prepared by thermal reduction of KMnO4 at 400°C and 800°C where one sample was heated at 1°C/min and the other was heated at 10°C/min. The materials were characterized by atomic absorption, average oxidation states of manganese, X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy. The results indicate that, by increasing the synthesis temperature, both the lamellar arrangement and the crystal size increased, while the Mn4+ amount in the material decreased. Furthermore, it was observed that as the conductivity increases for the materials, the catalytic performance also increases. Therefore, a direct correlation between the conductivity and catalytic performance can be established. For example, the layered manganese oxides material synthesized at 400°C, using a heating rate of 10°C/min, showed the highest AC conductivity and had the best performance in the degradation of methylene blue. Finally, we propose a general mechanism for understanding how manganese oxides behave as catalysts that produce oxidizing species from H2O2 which degrades methylene blue. Our proposed mechanism takes into consideration the state of aggregation of the catalyst, the availability of Mn4+, and the electrical conductivity.

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Low-temperature complete oxidation of CO over various manganese oxide catalysts

Cited by 59 publications

References 31 publications

Highly Active Palladium Nanocatalysts for Low-Temperature Carbon Monoxide Oxidation

Highly Active Palladium Nanocatalysts for Low-Temperature Carbon Monoxide Oxidation

Applications of Rhodium and Ruthenium Catalysts for CO Oxidation: an Overview

Decomposition of the Methylene Blue Dye Using Layered Manganese Oxide Materials Synthesized by Solid State Reactions

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