K-birnessite MnO2: a new selective oxidant for benzylic and allylic alcohols

Kamimura, Akio; Nozaki, Yuichiro; Ishikawa, Shingo; Inoue, Ryota; Nakayama, Masaharu

doi:10.1016/j.tetlet.2010.11.114

Cited by 28 publications

(10 citation statements)

References 29 publications

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“…Between 275 and 375 8C an exothermal process (T max at 332 8C) accompanied with slight mass loss of 1.5% takes place. This process is related with partial reduction of Mn 4+ into Mn 3+ and oxygen removal [24]. This means that the anhydrous birnessite obtained at 400 8C is characterized by somewhat different ratio of Mn 4+ to Mn 3+ ions and oxygen deficiency in comparison with the hydrated birnessite.…”

Section: Composition Structure and Morphologymentioning

confidence: 98%

A simple chemical method for deposition of electrochromic potassium manganese oxide hydrate thin films

Najdoski

Koleva

Demiri

et al. 2012

Materials Research Bulletin

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Section: Composition Structure and Morphologymentioning

confidence: 98%

A simple chemical method for deposition of electrochromic potassium manganese oxide hydrate thin films

Najdoski

Koleva

Demiri

et al. 2012

Materials Research Bulletin

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“…Traditional oxidants mainly include permanganate [8], manganese (IV) oxide [9,10], chromium (VI) oxide [11], and ruthenium reagents [12,13]. In general, these oxidants are needed at least a stoichiometric amount and usually bring about noxious byproducts.…”

Section: Introductionmentioning

confidence: 99%

Aerobic oxidation of secondary alcohols using NHPI and iron salt as catalysts at room temperature

Zhao

Sun

Miao

et al. 2014

Journal of Molecular Catalysis A: Chemical

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“…Previously, the catalyst used for benzaldehyde production/generation were inorganic and organic oxidants, such as chromium trioxide, ammonium permanganate, and tert-butyl hydroperoxide. However, these chemicals are inherently toxic, expensive, corrosive, thus resulting to many environmental issues and concerns 4 . In view of this, enormous efforts have been devoted to develop a more environmentally friendly catalytic systems to decrease the drawbacks of the usual traditional oxidation approaches 5 .…”

mentioning

confidence: 99%

Catalytic performance of the Ce-doped LaCoO3 perovskite nanoparticles

Ansari

Adil

Alam

et al. 2020

Sci Rep

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A series of La1-xCexCoO3 perovskite nanoparticles with rhombohedral phases was synthesized via sol–gel chemical process. X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), Electron Diffraction Spectroscopy (EDS), Thermogravimetric Analysis (TGA), UV–Vis spectroscopy, Fourier Transform Infrared spectra (FTIR), Nitrogen Adsorption/desorption Isotherm, Temperature Program Reduction/Oxidation (TPR/TPO), X-ray Photoelectron Spectroscopy (XPS) techniques were utilized to examine the phase purity and chemical composition of the materials. An appropriate doping quantity of Ce ion in the LaCoO3 matrix have reduced the bond angle, thus distorting the geometrical structure and creating oxygen vacancies, which thus provides fast electron transportation. The reducibility character and surface adsorbed oxygen vacancies of the perovskites were further improved, as revealed by H2-TPR, O2-TPD and XPS studies. Furthermore, the oxidation of benzyl alcohol was investigated using the prepared perovskites to examine the effect of ceria doping on the catalytic performance of the material. The reaction was carried out with ultra-pure molecular oxygen as oxidant at atmospheric pressure in liquid medium and the kinetics of the reaction was investigated, with a focus on the conversion and selectivity towards benzaldehyde. Under optimum reaction conditions, the 5% Ce doped LaCoO3 catalyst exhibited enhanced catalytic activity (i.e., > 35%) and selectivity of > 99%, as compared to the other prepared catalysts. Remarkably, the activity of catalyst has been found to be stable after four recycles.

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K-birnessite MnO2: a new selective oxidant for benzylic and allylic alcohols

Cited by 28 publications

References 29 publications

A simple chemical method for deposition of electrochromic potassium manganese oxide hydrate thin films

A simple chemical method for deposition of electrochromic potassium manganese oxide hydrate thin films

Aerobic oxidation of secondary alcohols using NHPI and iron salt as catalysts at room temperature

Catalytic performance of the Ce-doped LaCoO3 perovskite nanoparticles

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