A hybrid-assembly approach towards nitrogen-doped graphene aerogel supported cobalt nanoparticles as high performance oxygen reduction electrocatalysts

Liu, Ruili; Jin, Yeqing; Xu, Peimin; Xiao, Xing; Yang, Yuxing; Wu, Dongqing

doi:10.1016/j.jcis.2015.11.007

Cited by 27 publications

(4 citation statements)

References 38 publications

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“…Surprisingly high catalytic activity toward ORR (in alkaline medium) is exhibited by sheets with uniformly deposited Co nanoparticles [42]. Upon subjecting to pyrolysis at 600 °C, the resulting catalyst has exhibited electrocatalytic behavior comparable to that known for the commercial Pt/C catalyst in alkaline electrolyte.…”

Section: Hybrid Systemsmentioning

confidence: 82%

Elucidation of role of graphene in catalytic designs for electroreduction of oxygen

Kulesza

Żak

Rutkowska

et al. 2018

Current Opinion in Electrochemistry

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Section: Hybrid Systemsmentioning

confidence: 82%

Elucidation of role of graphene in catalytic designs for electroreduction of oxygen

Kulesza

Żak

Rutkowska

et al. 2018

Current Opinion in Electrochemistry

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“…An ideal supporting material should provide a large surface area and a high amount of nucleation sites for the fine dispersion of catalyst particles with uniform particle size, and simultaneously avoid particles agglomeration and minimize surface blockage effect ,,. In recent years, the N‐doped graphene (N‐rGO) has been recognized as an attractive supporting material that enables to tune catalyst‐support interactions ,. As expected, the N‐rGO supported noble metal nanocrystals have been frequently utilized in the high‐performance electrochemical energy‐relevant devices such as lithium ion battery, supercapacitor and fuel cell.…”

Section: Introductionmentioning

confidence: 97%

High Mass and Specific Activity for Ammonia Electro‐oxidation through Optimization of Dispersion Degree and Particle Size of Pt‐Ir Nanoparticles over N‐Doped Reductive Graphene Oxide

Zhou

Zhang

et al. 2018

ChemistrySelect

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Platinum and iridium co-supported on N-doped reductive graphene oxide (N-rGO) electrocatalysts (PtÀIr/N-rGO) were synthesized and investigated for ammonia electro-oxidation reaction (AOR) in alkaline media. Pt and Ir particles were deposited over the N-rGO substrate through a potentiodynamic electrodeposition method. The deposition parameters, lower potential limit (E L ) and scan rate, play a vital role on the dispersion degree and particle size of PtÀIr bimetallic nanoparticles over N-rGO. Additionally, the comparable current densities and a better poisoning inhibition are obtained compared to the commercial Pt (20 wt%)/C indicating that a synergistic effect among Pt, Ir and N-rGO substrate is existing in favour on the electrocatalytic activity. The N-rGO substrate with more active sites, higher excellent electrochemical activity and well dispersion for Pt and Ir particles anchoring is a suitable substrate for AOR and would be extended to other catalytic reactions.[a] Dr.

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“…14 In the past decades, porous materials such as silica gel, 15 zeolites 16 and metal-organic frameworks 17 have been extensively used as adsorbents for the removal of environmental pollutants. 29 Tingting et al obtained a nitrogen and sulfur doped graphene aerogel using molecular precursors, GO and thiourea, at 90 C followed by thermal reduction at 200 C. 30 In the present study, the surface chemistry of the aerogel was tailored for the adsorption of As(V) and As(III) by keeping the aqueous chemistry of arsenic in mind. Aerogels have been used as electrically conducting and non-conducting materials, adsorbents and supporting materials for catalysis due to their unique structure comprised of open and interconnected pores in a continuous solid matrix.…”

Section: Introductionmentioning

confidence: 81%

Modeling of adsorption behavior of the amine-rich GOPEI aerogel for the removal of As(iii) and As(v) from aqueous media

et al. 2016

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In the present study, a PEI cross-linked graphene oxide aerogel (GOPEI) was prepared. The interaction of GO and PEI was investigated by FT-IR and XPS analysis and after that further characterization was conducted using SEM, EDX, XRD, Raman spectroscopy and BET surface area measurement. The prepared GOPEI aerogel was utilized for the treatment of As(V) and As(III) contaminated water. The maximum uptake capacity, 4.80 AE 0.27 mg g À1 for As(V) and 4.26 AE 0.24 mg g À1 for As(III), was obtained at an initial As(V)/As(III) concentration of 3 mg L À1 , GOPEI dose 0.6 g L À1 , and ambient temperature (30 C). The adsorption process was found to be pH sensitive where the optimum pH was 4 for As(V) and 7for As(III) whereas at pH 6 significant uptake capacity was observed for both As(V) and As(III), which is close to the pH of drinking water. Therefore, GOPEI can be used for the adsorption of As(V) as well as As(III) at a common pH and ambient temperature without much changing the pH of drinking water. In order to use the GOPEI aerogel as an adsorbent in a continuous column for the treatment of arsenic contaminated water, the practicability was tested by conducting detailed kinetics, isotherm and thermodynamics studies. The adsorption, which occurs on a monolayer on the heterogeneous surface of the GOPEI aerogel, was found to be thermodynamically feasible and follows pseudo-second-order kinetics.

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A hybrid-assembly approach towards nitrogen-doped graphene aerogel supported cobalt nanoparticles as high performance oxygen reduction electrocatalysts

Cited by 27 publications

References 38 publications

Elucidation of role of graphene in catalytic designs for electroreduction of oxygen

Elucidation of role of graphene in catalytic designs for electroreduction of oxygen

High Mass and Specific Activity for Ammonia Electro‐oxidation through Optimization of Dispersion Degree and Particle Size of Pt‐Ir Nanoparticles over N‐Doped Reductive Graphene Oxide

Modeling of adsorption behavior of the amine-rich GOPEI aerogel for the removal of As(iii) and As(v) from aqueous media

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