Small-sized and high-dispersed WN from [SiO4(W3O9)4]4− clusters loading on GO-derived graphene as promising carriers for methanol electro-oxidation

Yan, Haijing; Tian, Chungui; Sun, Lu; Wang, Bo; Wang, Lei; Yin, Jie; Wu, Aiping; Fu, Honggang

doi:10.1039/c4ee00324a

Cited by 135 publications

(97 citation statements)

References 81 publications

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“…In the O1s spectrum (Figure 5d), the dominant peak at 530.1 eV belongs to lattice oxygen from the V-O species [43]. In addition, two weak peaks at 531.5 eV (C=O) and 533.4 eV (O-H and C-O) can also be clearly observed [40]. This is consistent with the results of the C1s and V2p 3/2 spectra.…”

Section: Synthesis and Characterization Of Vo X /Rgo Compositessupporting

confidence: 80%

“…The result further affirms the removal of oxygen functional groups in GO to form RGO in the preparation of VOx/RGO composites [40]. In addition, the presence of C-N species should be arising from the using of CTAB in the preparation process [40,45]. As illustrated in the morphological analysis ( Figure S4), obvious aggregation of vanadium oxide with poor dispersion was observed for the reference VOx/RGO sample without the use of CTAB.…”

Section: Synthesis and Characterization Of Vo X /Rgo Compositesmentioning

confidence: 70%

“…The peak area ratios of carbon-containing bonds to total area are also calculated and listed in Table S1. The result further affirms the removal of oxygen functional groups in GO to form RGO in the preparation of VOx/RGO composites [40]. In addition, the presence of C-N species should be arising from the using of CTAB in the preparation process [40,45].…”

Section: Synthesis and Characterization Of Vo X /Rgo Compositesmentioning

confidence: 83%

“…The above results indicate that the highly dispersed VO x nanoparticles loading on RGO sheets can be achieved by the ethanol solvothermal method with the assistance of CTAB. The positively charged CTAB may play an important role for the introduction and dispersion of V species owing to its intense interactions with both negatively charged GO and metavanadate anions [40]. Furthermore, it is noted that the calcination conditions showed significant influence on the microstructure of the VOx/RGO composites.…”

Section: Synthesis and Characterization Of Vo X /Rgo Compositesmentioning

confidence: 98%

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Facile Synthesis of Vanadium Oxide/Reduced Graphene Oxide Composite Catalysts for Enhanced Hydroxylation of Benzene to Phenol

et al. 2016

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Abstract:The vanadium oxide/reduced graphene oxide (VO x /RGO) composites have been prepared by a simple solvothermal method with the assistance of cationic surfactant cetyltrimethylammonium bromide (CTAB). The microstructure and morphology of the resultant VO x /RGO composites have been well characterized. The VO x nanoparticles are highly dispersed on the RGO sheets with a particle size of about 25 nm. When used as hydroxylation catalysts, the VO x /RGO composites are more efficient than individual RGO and vanadium oxide catalysts. The enhanced catalytic performance may be related to not only the well dispersed VO x active species, but also the hydrophobic surface and huge π-electron system of RGO for the adsorption and activation of benzene. In addition, the effects of calcination conditions on the microstructure and catalytic properties of VO x /RGO composites have also been investigated. The uniform VO x nanoparticles on the separated RGO sheets show highly efficient catalytic performance, while the formation of aggregated H x V 2 O 5 and bulk V 2 O 5 species along with the destruction of RGO sheets are poor for the hydroxylation of benzene. Up to 17.4% yield of phenol is achieved under the optimized catalytic reaction conditions.

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Section: Synthesis and Characterization Of Vo X /Rgo Compositessupporting

confidence: 80%

Section: Synthesis and Characterization Of Vo X /Rgo Compositesmentioning

confidence: 70%

Section: Synthesis and Characterization Of Vo X /Rgo Compositesmentioning

confidence: 83%

Section: Synthesis and Characterization Of Vo X /Rgo Compositesmentioning

confidence: 98%

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Facile Synthesis of Vanadium Oxide/Reduced Graphene Oxide Composite Catalysts for Enhanced Hydroxylation of Benzene to Phenol

et al. 2016

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“…The increase of electrons on the hybrid can facilitate the subsequent ORR. 37,38 For the WN FNs/N-C hybrid, the N 1s spectrum (as shown in Fig. 4f) could be deconvoluted into three peaks.…”

mentioning

confidence: 99%

Efficient synthesis of nitrogen-doped carbon with flower-like tungsten nitride nanosheets for improving the oxygen reduction reactions

et al. 2017

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A novel three-dimensional (3D) electrocatalyst composite was successfully prepared through a facile hydrothermal method, consisting of tungsten nitride nanosheets with flower-like morphology (WN FNs) and nitrogen-doped carbon black (N-C). Highly crystalline WN FNs were observed to be uniformly distributed in N-C, and remarkably promoted the catalytic activities toward oxygen reduction reaction (ORR) of the N-C. Moreover, the electrochemical results proved that, WN FNs/N-C composite shows a significantly higher ORR activity with a 4-electron transfer pathway and limiting current density of 5.8 mA cm À2 in alkaline solutions. The stability test of the nanocomposite showed less degradation after 5 h and its methanol tolerance also was enhanced compared with Pt/C. The improved performance of the WN FNs/N-C composite can be attributed to its unique configuration and the increased exposure of active sites, which suggests that it could serve as an ideal candidate for developing high performance ORR catalysts.

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Holey Reduced Graphene Oxide Coupled with an Mo₂N–Mo₂C Heterojunction for Efficient Hydrogen Evolution

et al. 2017

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An in situ catalytic etching strategy is developed to fabricate holey reduced graphene oxide along with simultaneous coupling with a small-sized Mo N-Mo C heterojunction (Mo N-Mo C/HGr). The method includes the first immobilization of H PMo O (PMo ) clusters on graphite oxide (GO), followed by calcination in air and NH to form Mo N-Mo C/HGr. PMo not only acts as the Mo heterojunction source, but also provides the Mo species that can in situ catalyze the decomposition of adjacent reduced GO to form HGr, while the released gas (CO) and introduced NH simultaneously react with the Mo species to form an Mo N-Mo C heterojunction on HGr. The hybrid exhibits superior activity towards the hydrogen evolution reaction with low onset potentials of 11 mV (0.5 m H SO ) and 18 mV (1 m KOH) as well as remarkable stability. The activity in alkaline media is also superior to Pt/C at large current densities (>88 mA cm ). The good activity of Mo N-Mo C/HGr is ascribed to its small size, the heterojunction of Mo N-Mo C, and the good charge/mass-transfer ability of HGr, as supported by a series of experiments and theoretical calculations.

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Small-sized and high-dispersed WN from [SiO₄(W₃O₉)₄]⁴⁻ clusters loading on GO-derived graphene as promising carriers for methanol electro-oxidation

Abstract: WN nanoparticles of 2–3 nm are grown on graphene, which can be used as promising carriers for methanol electro-oxidation.

Cited by 135 publications

References 81 publications

Facile Synthesis of Vanadium Oxide/Reduced Graphene Oxide Composite Catalysts for Enhanced Hydroxylation of Benzene to Phenol

Facile Synthesis of Vanadium Oxide/Reduced Graphene Oxide Composite Catalysts for Enhanced Hydroxylation of Benzene to Phenol

Efficient synthesis of nitrogen-doped carbon with flower-like tungsten nitride nanosheets for improving the oxygen reduction reactions

Holey Reduced Graphene Oxide Coupled with an Mo₂N–Mo₂C Heterojunction for Efficient Hydrogen Evolution

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Small-sized and high-dispersed WN from [SiO4(W3O9)4]4− clusters loading on GO-derived graphene as promising carriers for methanol electro-oxidation

Abstract: WN nanoparticles of 2–3 nm are grown on graphene, which can be used as promising carriers for methanol electro-oxidation.

Cited by 135 publications

References 81 publications

Facile Synthesis of Vanadium Oxide/Reduced Graphene Oxide Composite Catalysts for Enhanced Hydroxylation of Benzene to Phenol

Facile Synthesis of Vanadium Oxide/Reduced Graphene Oxide Composite Catalysts for Enhanced Hydroxylation of Benzene to Phenol

Efficient synthesis of nitrogen-doped carbon with flower-like tungsten nitride nanosheets for improving the oxygen reduction reactions

Holey Reduced Graphene Oxide Coupled with an Mo2N–Mo2C Heterojunction for Efficient Hydrogen Evolution

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Resources

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Small-sized and high-dispersed WN from [SiO₄(W₃O₉)₄]⁴⁻ clusters loading on GO-derived graphene as promising carriers for methanol electro-oxidation

Holey Reduced Graphene Oxide Coupled with an Mo₂N–Mo₂C Heterojunction for Efficient Hydrogen Evolution