Activated Carbon as a Catalyst in Certain Oxidation-Reduction Reactions.

Larsen, Elmer C.; Walton, James H.

doi:10.1021/j150397a009

Cited by 34 publications

(22 citation statements)

References 13 publications

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“…Little is known about the structure of surface nitrogen species, although the capability of fixation of nitrogen [18] in carbon particles and the promoting effect of the catalytic activity of nitrogenous carbon [19] have been observed. We have investigated the structure of surface nitrogen complexes produced as a result of the reaction between carbon particles and NH 3 at both an oxidizing [1] and a reducing atmosphere.…”

Section: Surface Complexesmentioning

confidence: 99%

Chemical and Catalytic Properties of Elemental Carbon

et al. 1982

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Section: Surface Complexesmentioning

confidence: 99%

Chemical and Catalytic Properties of Elemental Carbon

et al. 1982

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“…[14][15][16][17][18][19][20][21] This is one of the reasons why there is growing interest in exploring the potential of carbon-based materials as heterogeneous catalysts. 1,15,[22][23][24][25][26][27] Although the use of carbon-based materials in catalysis is not new, and there have been several reactions including deNOx, ozonizations and other oxidations that are known to be catalyzed by active carbons (ACs), [28][29][30] the field has gained a renewed momentum when graphenes (Gs) and more sophisticated carbon nanostructures have become largely available. 26,[31][32][33] One advantage of Gs and the build-upon products over other allotropic forms of carbon is that they can be obtained in sufficient quantities from commercially available graphite through reliable, well-established preparation procedures.…”

Section: Introduction and Scope Of The Reviewmentioning

confidence: 99%

Active sites on graphene-based materials as metal-free catalysts

et al. 2017

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Graphenes and related materials have attracted growing interest as metal-free catalysts. The present review is focused on describing the active sites that have been proposed to be responsible for the catalytic activity observed for such systems. It will be shown that diverse defects and chemical functionalities on the graphene layers can catalyze reactions, including oxygenated functional groups, carbon vacancies and holes, edge effects, and the presence of dopant elements. Besides discrete active sites, the catalytic activity arising from the collective properties of graphenes as materials by adsorbing substrates and reagents and activating them by charge transfer is also commented. The review has an introductory general section summarizing the general methodologies that have been used to support the proposed structure of the active sites, including theoretical calculations, comparison of the catalytic activity of graphene samples with different compositions, the use of organic molecules as models of the active centers, and selective masking of functional groups. The review is concluded with our view on future developments in the field.

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“…Donnet used AC for aerobic benzylic oxidation of 2-benzylbenzo[d]imidazoles in reaction conditions: substrate, 2 mmol; AC, 60 mg; time, 12 hrs; temp, 80 ∘ C; and observed maximum productivity, 0.35 mmol/g⋅h [27]. Similarly AC was used as a catalyst for oxidation of benzyl alcohol in different studies with productivity values (0.11 mmol/g⋅h and 0.506 mmol/g⋅h), respectively [2,26]. Sun et al [23] reported maximum productivity value (28.8 mmol/g⋅h) for AC used for oxidation of cyclohexane in acetonitrile with TBHP.…”

Section: Catalytic Activity Of the Catalystmentioning

confidence: 99%

“…The catalytic activity of the AC for the decomposition of hydrogen peroxide was very good but persisted only for short duration. The most probable reason for the vanishing of catalytic activity being used for decomposition of hydrogen peroxide may be deactivation of oxygenated groups on the surface of activated carbon [2,3]. The major issue related to durability of AC was successfully addressed by researchers in recent decades.…”

Section: Introductionmentioning

confidence: 99%

Tuning of Activated Carbon for Solvent-Free Oxidation of Cyclohexane

Sadiq

Khan

Numan

et al. 2017

Journal of Chemistry

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Activated carbon (AC) was prepared from carbonization of phosphoric acid soaked peanut shell at 380 ∘ C under inert atmosphere followed by activation with hydrogen peroxide. The AC was characterized by SEM, EDX, FTIR, TGA, and BET surface area and pore size analyzer. The potential of AC as a catalyst for solvent-free oxidation of cyclohexane to cyclohexanol and cyclohexanone (the mixture is known as KA oil) in the presence of molecular oxygen at moderate temperature was investigated in a self-designed double-walled three-necked batch reactor. The effect of different reaction parameters/additive was optimized. The maximum productivity value (2.14 mmolg −1 h −1 , without base, and 4.85 mmolg −1 h −1 , with 0.2 mmol NaOH) of the desired product was achieved under optimal reaction parameters: vol 12.5 mL, cat 0.4 g, time 14 h, oxygen flow 40 mL/min (pO 2 760 Torr), stirring 1100 rpm, and temp 75∘ C. The AC shows recyclability for multiple runs without any significant loss in activity. Thus, the AC can be an efficient catalyst, due to low cost, ease of synthesis, easy recovery, nonleaching, and recyclability for multiple uses for the solvent-free oxidation of cyclohexane.

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Activated Carbon as a Catalyst in Certain Oxidation-Reduction Reactions.

Cited by 34 publications

References 13 publications

Chemical and Catalytic Properties of Elemental Carbon

Chemical and Catalytic Properties of Elemental Carbon

Active sites on graphene-based materials as metal-free catalysts

Tuning of Activated Carbon for Solvent-Free Oxidation of Cyclohexane

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