Facile synthesis of hydrogenated reduced graphene oxide via hydrogen spillover mechanism

Krishna, Rahul; Titus, Elby; Costa, L.C.; Menezes, José C. J. M. D. S.; Correia, M. R.; Pinto, S.; Ventura, J.; Araújo, João P.; Cavaleiro, José A. S.; Grácio, J.

doi:10.1039/c2jm30945a

Cited by 53 publications

(26 citation statements)

References 28 publications

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“…Figure 4(b) shows the Fourier transform infrared (FTIR) spectrum of the graphene nanosheets. The absorption bands near 2,850 cm -1 can be assigned to C-H stretching modes [37]. The presence of such C-H stretching modes, which are absent in the FTIR spectrum of pristine graphite, indicates the functionalization of graphene edge by hydrogen during the exfoliation process.…”

Section: Resultsmentioning

confidence: 99%

Lithium-assisted exfoliation of pristine graphite for few-layer graphene nanosheets

Sun

Shen

et al. 2014

Nano Res.

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A lithium-assisted approach has been developed for the exfoliation of pristine graphite, which allows the large-scale preparation of few-layer graphene nanosheets. The process involves an unexpected physical insertion and exfoliation, and the graphene nanosheets prepared by this method reveal undisturbed sp 2 -hybridized structures. A possible two-step mechanism, which involves the negative charge being trapped around the edges of the graphite layers and a subsequent lithiation process, is proposed to explain the insertion of lithium inside the graphite interlayers. If necessary, the present exfoliation can be repeated and thinner (single or 2-3 layer) graphene can be achieved on a large scale. This simple process provides an efficient process for the exfoliation of pristine graphite, which might promote the future applications of graphene.

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Section: Resultsmentioning

confidence: 99%

Lithium-assisted exfoliation of pristine graphite for few-layer graphene nanosheets

Sun

Shen

et al. 2014

Nano Res.

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“…Simultaneously, Pt and Pd nanoparticles are also generated by galvanic replacement reaction (GRR) from their corresponding metal ions in the solution. The Pt and Pd nanoparticles on GO split the molecular hydrogen to atomic hydrogen by spill-over mechanism [42,43] and generated active [H], which helps to reduce the GO more effectively compared with the absence of metals nanoparticles. In our earlier report on the reduction of GO by Mg ribbon/acid [44], the overall C C bonds of GO are shown to enhance from 30% to 52%.…”

Section: Resultsmentioning

confidence: 99%

Rapid reduction of GO by hydrogen spill-over mechanism by in situ generated nanoparticles at room temperature and their catalytic performance towards 4-nitrophenol reduction and ethanol oxidation

Barman

Nanda

2015

Applied Catalysis A: General

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“…In this case, the dangling hydrogen atoms trigger the electron transfer, forming spin ordering in this previous spin ordering lacking structure. The hydric effect can also be found in other material systems of two‐dimensional (2D) nanomaterials . 2D nanomaterials, especially for ultrathin nanosheets with atomic thickness, usually have so large a surface that the surface state is as important as the bulk counterparts.…”

Section: Introductionmentioning

confidence: 99%

The Hydric Effect in Inorganic Nanomaterials for Nanoelectronics and Energy Applications

Sun

Guo

et al. 2015

Advanced Materials

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Protons, as one of the world's smallest ions, are able to trigger the charge effect without obvious lattice expansion inside inorganic materials, offering a unique and important test-bed for controlling their diverse functionalities. Arising from the high chemical reactivity of hydrogen (easily losing an electron) with various main group anions (easily accepting a proton), the hydric effect provides a convenient and environmentally benign route to bring about fascinating new physicochemical properties, as well as to create new inorganic structures based on the "old lattice" without dramatically destroying the pristine structure, covering most inorganic materials. Moreover, hydrogen atoms tend to bond with anions or to produce intrinsic defects, both of which are expected to inject extra electrons into lattice framework, promising advances in control of bandgap, spin behavior, and carrier concentration, which determine functionality for wide applications. In this review article, recently developed effective hydric strategies are highlighted, which include the conventional hydric reaction under high temperature or room temperature, proton irradiation or hydrogen plasma treatment, and gate-electrolyte-driven adsorption or doping. The diverse physicochemical properties brought by the hydric effect via modulation of the intrinsic electronic structure are also summarized, finding wide applications in nanoelectronics, energy applications, and catalysis.

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Facile synthesis of hydrogenated reduced graphene oxide via hydrogen spillover mechanism

Abstract: Here we demonstrate a single step approach for the facile reduction of graphene oxide (GO) to hydrogenated reduced graphene oxide (HRGO) under ambient conditions.

Cited by 53 publications

References 28 publications

Lithium-assisted exfoliation of pristine graphite for few-layer graphene nanosheets

Lithium-assisted exfoliation of pristine graphite for few-layer graphene nanosheets

Rapid reduction of GO by hydrogen spill-over mechanism by in situ generated nanoparticles at room temperature and their catalytic performance towards 4-nitrophenol reduction and ethanol oxidation

The Hydric Effect in Inorganic Nanomaterials for Nanoelectronics and Energy Applications

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