A sandwich N-doped graphene/Co3O4 hybrid: an efficient catalyst for selective oxidation of olefins and alcohols

Nie, Renfeng; Shi, Juanjuan; Du, Weichen; Ning, Wensheng; Hou, Zhenshan; Xiao, Feng‐Shou

doi:10.1039/c3ta11672g

Cited by 198 publications

(112 citation statements)

References 75 publications

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“…This catalyst reaches an 89.5% alcohol conversion and 97.3% selectivity to benzaldehyde. Xiao et al [16] prepared a "sandwich" N-doped graphene/Co3O4 hybrid catalyst, which performed well catalytic efficiency for alcohols conversion. It is well know that the structure and property of active phase in the catalysts are affected for the material used as the support.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Performance of Co3O4 on Different Activated Carbon Supports in the Benzyl Alcohol Oxidation

et al. 2017

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Co 3 O 4 particles were supported on a series of activated carbons (G60, CNR, RX3, and RB3). Incipient wetness method was used to prepare these catalysts. The effect of the structural and surface properties of the carbonaceous supports during oxidation of benzyl alcohol was evaluated. The synthetized catalysts were characterized via IR, TEM, TGA/MS, XRD, TPR, AAS, XPS, and N 2 adsorption/desorption isotherm techniques. Co 3 O 4 /G60 and Co 3 O 4 /RX3 catalysts have high activity and selectivity on the oxidation reaction reaching conversions above 90% after 6 h, without the presence of promoters. Catalytic performances show that differences in chemistry of support surface play an important role in activity and suggest that the presence of different ratios of species of cobalt and oxygenated groups on surface in Co 3 O 4 /G60 and Co 3 O 4 /RX3 catalysts, offered a larger effect synergic between both active phase and support increasing their catalytic activity when compared to the other tested catalysts.

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Section: Introductionmentioning

confidence: 99%

Catalytic Performance of Co3O4 on Different Activated Carbon Supports in the Benzyl Alcohol Oxidation

et al. 2017

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“…was observed in XRD patterns of graphene-based supports (Fig. 1a), which indicates that GO was reduced by partially removing surface oxygen-containing groups (see Table 1) and then restacked to a poorly ordered graphite-like material [26,27]. The (002) peak of NRGO-300 is weaker and boarder than that of RGO, which could be attributed to less re-graphitization of NRGO-300 because of the incorporation of nitrogen atoms into carbon skeletal of graphene.…”

Section: Catalytic Testmentioning

confidence: 85%

Selective hydrogenation of C C bond over N-doped reduced graphene oxides supported Pd catalyst

Nie

Miao

et al. 2016

Applied Catalysis B: Environmental

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“…The Co 2p3/2 (~780.8 eV) spectra of the semicarbazide hydrochloride modified composite catalyst is shown in Figure 9, which is divided into 780.5 eV, 782.5 eV, and the companied weak peak at 786 eV, corresponding to Co 3+ 2p3/2, Co 2+ 2p3/2, and spinel structure with Co3O4, respectively [29]. The calculated results are shown that content of Co and Co 3+ /Co 2+ increased with As shown in Figure 7, each sample has an asymmetric Co 2p3/2 (~781, eV) signal, which divided into two peaks, as high-valence Co 3+ 2p3/2 centered at 780.5 eV and low-valence Co 2+ 2p3/2 at 782.5 eV [24]. The surface Co element is shown in Figure 7f.…”

Section: Samples La (%) Co (%) O (%) C (%)mentioning

confidence: 85%

“…LC-U As shown in Figure 7, each sample has an asymmetric Co 2p3/2 (~781, eV) signal, which divided into two peaks, as high-valence Co 3+ 2p3/2 centered at 780.5 eV and low-valence Co 2+ 2p3/2 at 782.5 eV [24]. The surface Co element is shown in Figure 7f.…”

Section: Samples La (%) Co (%) O (%) C (%)mentioning

confidence: 99%

Active Component Migration and Catalytic Properties of Nitrogen Modified Composite Catalytic Materials

Peng

Zheng

et al. 2018

Catalysts

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During the catalytic combustion reaction of methane, the migration of the active species on surface facilitates the catalytic reaction, and the element doping can improve the redox performance of the catalyst. Nitrogen-modified perovskite type composite catalysts were prepared by hydrothermal method and then characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), temperature-programmed reductions (TPR), and X-ray photoelectron spectra (XPS). The results revealed that nitrogen sources (urea, biuret, melamine, carbohydrazide, and semicarbazide hydrochloride) and nitrogen source addition changed the catalytic performance in physical and chemical properties, the migration of reactive species and the catalytic performance. When the addition amount of semicarbazide hydrochloride was three times that of LaCoO 3 , the composite catalysts had high Co 3+ /Co 2+ (1.39) and O ads /O lat (15.18) and showed the best catalytic performance: the temperatures that are required for achieving methane conversion of 50% and 90% were 277 and 360 • C, which are more effective than noble metal oxides. Moreover, the in situ diffuse reflectance infrared fourier transform spectroscopy (DRIFTS) were applied to elucidate the efficient for CH 4 removal and also can further explain the surface reaction mechanism of the composite catalyst during the methane catalytic combustion.

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A sandwich N-doped graphene/Co3O4 hybrid: an efficient catalyst for selective oxidation of olefins and alcohols

Cited by 198 publications

References 75 publications

Catalytic Performance of Co3O4 on Different Activated Carbon Supports in the Benzyl Alcohol Oxidation

Catalytic Performance of Co3O4 on Different Activated Carbon Supports in the Benzyl Alcohol Oxidation

Selective hydrogenation of C C bond over N-doped reduced graphene oxides supported Pd catalyst

Active Component Migration and Catalytic Properties of Nitrogen Modified Composite Catalytic Materials

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