Synthesis and Characterization of Iron–Nitrogen-Doped Graphene/Core–Shell Catalysts: Efficient Oxidative Dehydrogenation of <i>N</i>-Heterocycles

Cui, Xinjiang; Li, Yuehui; Bachmann, Stephan; Scalone, Michelangelo; Surkus, Annette‐Enrica; Junge, Kathrin; Topf, Christoph; Beller, Matthias

doi:10.1021/jacs.5b05674

Cited by 282 publications

(190 citation statements)

References 83 publications

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“…This Co-catalyzed HDO of HMF will be studied in detail in our further works. [55] We exploredt he morphologies of Fe-L1/C-800, Fe-L1/C-400, and Fe-L4/C-800 by TEM and energy-dispersive X-ray (EDX) analysis( Figure S3). Although Ni catalysts were previously reported to be more effective than Fe catalysts in the HDO of furanicc ompounds, [53] the pyrolysis of metal-phenanthroline complexes on activated carbon seemed to generate Fe catalysts that were more active than Ni catalysts.…”

Section: Catalysts Creeningmentioning

confidence: 97%

Selective Hydrodeoxygenation of 5‐Hydroxymethylfurfural to 2,5‐Dimethylfuran over Heterogeneous Iron Catalysts

Liu

et al. 2017

ChemSusChem

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This work provided the first example of selective hydrodeoxygenation of 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF) over heterogeneous Fe catalysts. A catalyst prepared by the pyrolysis of an Fe-phenanthroline complex on activated carbon at 800 °C was demonstrated to be the most active heterogeneous Fe catalyst. Under the optimal reaction conditions, complete conversion of HMF was achieved with 86.2 % selectivity to DMF. The reaction pathway was investigated thoroughly, and the hydrogenation of the C=O bond in HMF was demonstrated to be the rate-determining step during the hydrodeoxygenation, which could be accelerated greatly by using alcohol solvents as additional H-donors. The excellent stability of the Fe catalyst, which was probably a result of the well-preserved active species and the pore structure of the Fe catalyst in the presence of H , was demonstrated in batch and continuous flow fixed-bed reactors.

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Section: Catalysts Creeningmentioning

confidence: 97%

Selective Hydrodeoxygenation of 5‐Hydroxymethylfurfural to 2,5‐Dimethylfuran over Heterogeneous Iron Catalysts

Liu

et al. 2017

ChemSusChem

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“…[24][25][26] Doping with nitrogen atoms can lead to as light distortion in the crystal lattice of the carbon materiala nd thereby cause defects. [24][25][26] Doping with nitrogen atoms can lead to as light distortion in the crystal lattice of the carbon materiala nd thereby cause defects.…”

Section: Introductionmentioning

confidence: 99%

Biomass Sucrose‐Derived Cobalt@Nitrogen‐Doped Carbon for Catalytic Transfer Hydrogenation of Nitroarenes with Formic Acid

et al. 2018

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Fabrication of non‐noble metal‐based heterogeneous catalysts by a facile and cost‐effective strategy for ecofriendly catalytic transfer hydrogenation (CTH) is of great significance for organic transformations. A cobalt@nitrogen‐doped carbon (Co@NC) catalyst was prepared from renewable biomass‐derived sucrose, harmless melamine, and earth‐abundant Co(AcO)2 as the precursor materials by hydrothermal treatment and carbonization. Co nanoparticles (NPs) were coated with NC shells and uniformly embedded in the NC framework. The as‐obtained Co@NC‐600 (carbonized at 600 °C) catalyst exhibited excellent catalytic efficiency for CTH of various functionalized nitroarenes with formic acid (FA) as hydrogen donor in aqueous solution. The uniformly incorporated N atoms in the C matrix and the encapsulated Co NPs showed synergistic effects in the CTH reactions. A mechanistic analysis indicated that the protons from FA were activated by Co sites after being captured by N atoms, and then reacted with nitroarenes adsorbed on the surface of the catalysts to generate the corresponding aromatic amines. Moreover, the catalyst showed excellent durability and reusability without obvious decrease in activity even after five reaction cycles. Thus, the study reported herein provides a cost‐effective, sustainable strategy for fabrication of biomass‐derived non‐noble metal‐based catalysts for green and efficient catalytic transformations.

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“…20 Overall, these catalysts represent appealing base-metal alternatives to heterogeneous Pd/C and other supported noble metals, and we reasoned that similar catalysts could promote aerobic dehydrogenation of heterocycles. 21 …”

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confidence: 99%

Catalytic Aerobic Dehydrogenation of Nitrogen Heterocycles Using Heterogeneous Cobalt Oxide Supported on Nitrogen-Doped Carbon

2015

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Dehydrogenation of (partially) saturated heterocycles provides an important route to heteroaromatic compounds. A heterogeneous cobalt oxide catalyst, previously employed for aerobic oxidation of alcohols and amines, is shown to be effective for aerobic dehydrogenation of various 1,2,3,4-tetrahydroquinolines to the corresponding quinolines. The reactions proceed in good yields under mild conditions. Other N-heterocycles are also successfully oxidized to their aromatic counterparts.

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Synthesis and Characterization of Iron–Nitrogen-Doped Graphene/Core–Shell Catalysts: Efficient Oxidative Dehydrogenation of N-Heterocycles

Cited by 282 publications

References 83 publications

Selective Hydrodeoxygenation of 5‐Hydroxymethylfurfural to 2,5‐Dimethylfuran over Heterogeneous Iron Catalysts

Selective Hydrodeoxygenation of 5‐Hydroxymethylfurfural to 2,5‐Dimethylfuran over Heterogeneous Iron Catalysts

Biomass Sucrose‐Derived Cobalt@Nitrogen‐Doped Carbon for Catalytic Transfer Hydrogenation of Nitroarenes with Formic Acid

Catalytic Aerobic Dehydrogenation of Nitrogen Heterocycles Using Heterogeneous Cobalt Oxide Supported on Nitrogen-Doped Carbon

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