Recent progress in 2D or 3D N-doped graphene synthesis and the characterizations, properties, and modulations of N species

Fan, Mengmeng; Feng, Zhang‐Qi; Zhu, Chen; Chen, Xiao; Chen, Chuntao; Yang, Jiazhi; Sun, Dongping

doi:10.1007/s10853-016-0250-8

Cited by 90 publications

(64 citation statements)

References 215 publications

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“…%. The amount of nitrogen that can be introduced with the present approach is similar to the values commonly achieved by other reported protocols, including chemical vapor deposition growth of N‐doped graphene and bulk synthesis of N‐doped graphene‐based materials via thermal, solvothermal and electrochemical methods …”

Section: Resultssupporting

confidence: 65%

Nanosecond Laser‐Assisted Nitrogen Doping of Graphene Oxide Dispersions

et al. 2017

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N-doped reduced graphene oxide (RGO) has been prepared in bulk form by laser irradiation of graphene oxide (GO) dispersed in an aqueous solution of ammonia. A pulsed Nd:YAG laser with emission wavelengths in the infrared (IR) 1064 nm, visible (Vis) 532 nm, and ultraviolet (UV) 266 nm spectral regions was employed for the preparation of the N-doped RGO samples. Regardless of the laser energy employed, the resulting material presents a higher fraction of pyrrolic nitrogen compared to nitrogen atoms in pyridinic and graphitic coordination. Noticeably, whereas increasing the laser fluence of UV and Vis wavelengths results in an increase in the total amount of nitrogen, up to 4.9 at. % (UV wavelength at 60 mJ cm fluence), the opposite trend is observed when the GO is irradiated in ammonia solution through IR processing. The proposed laser-based methodology allows the bulk synthesis of N-doped reduced graphene oxide in a simple, fast, and cost efficient manner.

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Section: Resultssupporting

confidence: 65%

Nanosecond Laser‐Assisted Nitrogen Doping of Graphene Oxide Dispersions

et al. 2017

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“…Graphene and nitrogen-doped graphene have many attracting features including high surface area and excellent conductivity [23,24]. However, due to the 2-dimensional (2D) nature of graphene, it tends to stack through p-p interaction [23,25].…”

Section: Introductionmentioning

confidence: 99%

Electrosprayed catalyst layers based on graphene–carbon black hybrids for the next-generation fuel cell electrodes

et al. 2016

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Here, we report a novel electrode structure with graphene and graphene-carbon black hybrids by electrospraying for polymer electrolyte membrane fuel cells. After syntheses of platinum (Pt)/partially reduced graphene oxide (rGO) and Pt/r-GO/carbon black (CB) hybrid electrocatalysts, suspensions of synthesized electrocatalyst inks were prepared with Nafion Ò ionomer and poly(vinylidene fluoride-cohexafluoropropylene) and electrosprayed over carbon paper to form electrodes. Electrosprayed catalyst layer exhibited uniform and small size Pt distribution. As the graphene content increases micrometer-sized droplet, pore formation and surface roughness of the electrode increase. Thus, an open porous electrode structure which is favorable for mass transport is achieved by electrospraying. The maximum power densities, 324 mW cm -2 for Pt/rGO and 441 mW cm -2 for Pt/rGO/CB electrosprayed electrodes, were achieved at a relatively low catalyst loading.

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“…Graphene has many interesting properties, 18-21 such as being able to be used in energy storage, [22][23][24][25][26] catalysis, [27][28][29][30][31] and superconducting materials. 32,33 GO, as a precursor of graphene, has been used in EMs, and it has been reported to catalyze the thermal decomposition of EMs.…”

Section: Introductionmentioning

confidence: 99%

Study on the thermal decomposition mechanism of graphene oxide functionalized with triaminoguanidine (GO-TAG) by molecular reactive dynamics and experiments

Chong-min

Yan

et al. 2019

RSC Adv.

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Graphene oxide (GO) has a catalytic effect on the thermal decomposition of energetic materials above the melting point. To further enhance the catalytic activity of GO, it has been functionalized with the high nitrogen ligand triaminoguanidine (TAG). However, theoretical studies on the reactivity of functionalized GO (e.g., GO-TAG) have not been carried out. Therefore, the thermal decomposition of each TAG, GO and GO-TAG is studied by molecular dynamic simulations using a reactive force-field (ReaxFF) with experimental verification, and the results are reported herein. The results show that the GO nanolayer has a tendency to aggregate into a large carbon cluster during its degradation. The main decomposition products of TAG are NH 3 , N 2 and H 2 . For GO-TAG, the main decomposition products are H 2 O, NH 3 , N 2 and H 2 . GO has a significant acceleration effect on the decomposition process of TAG by decreasing the decomposition temperature of TAG. This phenomenon is in agreement with the experimental results.The initial decomposition of TAG is mainly caused by hydrogen transfer in the molecule. The edge carbon atoms of GO promote the decomposition of TAG molecules and reduce the decomposition activation energy of TAG by 15.4 kJ mol À1 . Therefore, TAG will quickly decompose due to the catalytic effect of GO. This process produces a "new" GO that catalyzes the decomposition of components such as TAG. At the same time, many free radicals (HN 2 , H 2 N and free H) are generated during the decomposition of TAG to catalyze the decomposition of other components, which in turn, enhance the catalytic capability of GO. † Electronic supplementary information (ESI) available. See

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Recent progress in 2D or 3D N-doped graphene synthesis and the characterizations, properties, and modulations of N species

Cited by 90 publications

References 215 publications

Nanosecond Laser‐Assisted Nitrogen Doping of Graphene Oxide Dispersions

Nanosecond Laser‐Assisted Nitrogen Doping of Graphene Oxide Dispersions

Electrosprayed catalyst layers based on graphene–carbon black hybrids for the next-generation fuel cell electrodes

Study on the thermal decomposition mechanism of graphene oxide functionalized with triaminoguanidine (GO-TAG) by molecular reactive dynamics and experiments

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