Engineering thermal and electrical properties of B/N doped carbon nanotubes: Tight binding approximation

Behzad, Somayeh; Chegel, Raad

doi:10.1016/j.jallcom.2019.03.381

Cited by 18 publications

(1 citation statement)

References 45 publications

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“…As electro-catalysts for PEFC, heteroatom-doped carbons, such as nitrogen, boron, sulfur, and phosphorus, have raised attention because carbon-based materials are abundant, cheap, and have highly tunable electronic structure. [30][31][32][33][34][35][36][37][38][39][40] A principal application of nitrogen-or other elements-doped carbon is as electrocatalysts for ORR, [30][31][32][33]35 a cathodic reaction in PEFC. Recently, nitrogen-doped graphene has been examined as an electrocatalyst to clarify the difference in its properties arising due to nitrogen, pyridinic, pyrrolic, and graphitic structure in the lattice.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Activity of Heteroatom-Doped Graphene for Oxidation of Hydroquinones

et al. 2020

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In the present study, we aim to synthesize heteroatom (nitrogen or boron) doped-reduced graphene oxide (N-rGO or B-rGO) as a catalyst for the electro-oxidation of hydroquinones, used as a candidate of fuel (hydrogen carrier molecule) for direct-type fuel cells (DFCs), and evaluate the doping effect on its catalytic activity. N-rGO and B-rGO were prepared from a mixture of graphene oxide (GO) and urea or boron trioxide by pyrolysis method. We characterized the morphology and crystal structure of the prepared materials by transmission electron microscopy, and X-ray diffraction, respectively. Energy dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy show the loading amount of the heteroatoms, 10.4 wt% N and 2.9 wt% B, as well as their chemical nature. The electrochemical analysis of the prepared materials by rotating disk electrode system reveals high activity of B-rGO, 15 and 85 mV lower overvoltage compared with rGO at the half-wave potential of diffusion-limited current, for the electro-oxidation of hydroquinone and methyl-hydroquinone, respectively, because of its electron-accepting nature. We demonstrate that thus modified carbons exhibit high activity, B-rGO > N-rGO > rGO, for the oxidation of hydroquinone derivatives as non-metallic anodes of DFCs.

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