Palladium doped manganese dioxide catalysts for low temperature carbon monoxide oxidation

Salker, A. V.; Kunkalekar, R.K.

doi:10.1016/j.catcom.2009.05.028

Cited by 32 publications

(16 citation statements)

References 33 publications

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“…Ni‐ and Ce‐doped MnO 2 nanomaterials of composition Mn 1−X A X O 2 (A = Ni, Ce and X = 0, 0.05) were prepared by a dextrose assisted co‐precipitation method . The calculated amount of respective metal salts were dissolved in distilled water; these solutions were then mixed with 2% dextrose solution (AR) at 100 °C with stirring.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore there is increasing demand for novel antibacterial agents, and recently, due to their high antibacterial and catalytic activities, metal nanoparticles have attracted the attention of researchers and medical microbiologists worldwide , , , . The high antibacterial and chemical catalytic activity of metal nanoparticles has been credited to their nano‐size and high surface‐to‐volume ratio, which allows them to interact with microbial membrane surfaces and also helps to speed up chemical reactions , , , , . Other properties of nanomaterials that influence toxicity include chemical composition, shape, surface structure, surface charge, aggregation and solubility, and presence or absence of functional groups , , , .…”

Section: Introductionmentioning

confidence: 99%

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Antibacterial activity of silver‐doped manganese dioxide nanoparticles on multidrug‐resistant bacteria

Kunkalekar

Naik

Dubey

et al. 2012

J of Chemical Tech & Biotech

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BACKGROUND: As a result of evolution of multiple drug resistance in human pathogens (bacteria) there is increasing demand for novel antibacterial agents, and recently, due to their high antibacterial and catalytic activities, metal nanoparticles have attracted the attention of researchers and medical microbiologists worldwide. RESULTS: Ni‐, Ce‐ and Ag‐doped MnO2 nanoparticles were synthesized by a co‐precipitation method. Antibacterial activity of these synthesized nanoparticles on methicillin‐resistant Staphylococcus aureus and lead‐resistant Pseudomonas aeruginosa strain 4EA was investigated using a disc diffusion method. Only Ag‐doped MnO2 nanoparticles showed an antibacterial property against methicillin‐resistant Staphylococcus aureus and lead‐resistant Pseudomonas aeruginosa strain 4EA at low levels of 60 µg/disc and 85 µg/disc, respectively. Scanning electron microscopy and transmission electron microscopy (SEM‐TEM) coupled with energy dispersive X‐ray (EDX) analysis revealed the nano‐size and composition of these synthesized nanoparticles. CONCLUSION: It was confirmed through a disc diffusion method that chemically synthesized silver doped MnO2 nanoparticles have antibacterial activity against multidrug‐resistant Staphylococcus aureus and lead‐resistant Pseudomonas aeruginosa strain 4EA at low levels therefore these nanoparticles can be employed to fight and prevent infections caused by multidrug‐resistant bacterial pathogens. © 2012 Society of Chemical Industry

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Antibacterial activity of silver‐doped manganese dioxide nanoparticles on multidrug‐resistant bacteria

Kunkalekar

Naik

Dubey

et al. 2012

J of Chemical Tech & Biotech

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“…2 следует, что по сравнению с золотосодержащими катализа-торами доля Pt-, Pd-, Ag-содержащих катализаторов очень незначительна [28][29][30][31][32][33][34][35][36][37], а катализаторы состава Pd/SAPO-34 [28], Pd/CeO 2 [29], Pt/CeO 2 -ZrO 2 /SBA-15 [32] окисляют СО при 100-250 °С. При этом катализаторы состава Pt/УВ [33,34] и Pt/ МО х (М = Fe, Zn, Al, Ni) [35] обеспечивают 100%-ное окисление СО при комнат-Fe, Zn, Al, Ni) [35] обеспечивают 100%-ное окисление СО при комнат-, Zn, Al, Ni) [35] обеспечивают 100%-ное окисление СО при комнат-Zn, Al, Ni) [35] обеспечивают 100%-ное окисление СО при комнат-, Al, Ni) [35] обеспечивают 100%-ное окисление СО при комнат-Al, Ni) [35] обеспечивают 100%-ное окисление СО при комнат-, Ni) [35] обеспечивают 100%-ное окисление СО при комнат-Ni) [35] обеспечивают 100%-ное окисление СО при комнат-) [35] обеспечивают 100%-ное окисление СО при комнат-ной температуре, но при больших значениях t (1,13; 6 и 0,38 с, соответственно).…”

Section: состав и активность металлических катализаторов окисления моunclassified

The State and Prospects of Development of Low-Temperature Catalysts for Carbon Monoxide Oxidation of Respiratory Purpose. I Metal Catalysts

Rakitskaya¹,

Kiose²,

Ennan³

et al. 2015

Odesa National University Herald. Chemistry

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“…9,18 Although gold supported on manganese oxide has shown high activity in CO oxidation reactions, unfortunately their catalytic stability was not satisfactory. Salker et al 25 prepared nano-scaled palladium doped manganese dioxide catalysts using co-precipitation method, and found that the effect of high moisture content on catalytic activity shows much better results than low moisture content. 22,23 In addition, the accumulation of carbonate and carboxylate species on the active sites depend on the nature of the supports.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of manganese oxide nanorods as a highly active support for gold nanoparticles in CO oxidation and their stability at low temperature

et al. 2015

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Nanostructured mesoporous a-MnO 2 nanorods were synthesized via a simple hydrothermal process using MnSO 4 $H 2 O and KMnO 4 as precursors. A series of Au/MnO 2 catalysts were prepared by a colloidal deposition (CD) method and were characterized by X-ray diffraction (XRD), nitrogen adsorption, scanning electron microscopy (SEM) and temperature programmed reduction of hydrogen (H 2 -TPR) analysis. The influence of the preparation conditions of the supports on the catalytic performance of Au/MnO 2 catalysts in CO oxidation has been investigated. The results show that the structure and properties of MnO 2 products were strongly dependent on the hydrothermal time. One can distinguish the aspect ratio of MnO 2 nanorods from SEM images. The obtained Au/MnO 2 catalysts with 1 wt% Au exhibits excellent performance with a complete CO conversion at 20 C (T 100% ¼ 20 C) and 50% CO conversion at À25 C (T 50% ¼ À25 C). Furthermore, H 2 -TPR studies reveal the superior activities have been attributed to the support unique reducibility and the interaction between Au and support. However, the U-shaped activity curves show a significant drop in CO conversion at low-temperature. With the help of temperature programmed desorption (CO 2 -TPD) and CO 2 static adsorption studies, it confirms that the deactivation of catalytic activity was attributed to the adsorbed CO 2 taking up the active sites, which can be desorbed by increasing the reaction temperature.

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Palladium doped manganese dioxide catalysts for low temperature carbon monoxide oxidation

Cited by 32 publications

References 33 publications

Antibacterial activity of silver‐doped manganese dioxide nanoparticles on multidrug‐resistant bacteria

Antibacterial activity of silver‐doped manganese dioxide nanoparticles on multidrug‐resistant bacteria

The State and Prospects of Development of Low-Temperature Catalysts for Carbon Monoxide Oxidation of Respiratory Purpose. I Metal Catalysts

Hydrothermal synthesis of manganese oxide nanorods as a highly active support for gold nanoparticles in CO oxidation and their stability at low temperature

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