Response to “Comment on ‘Carbon nanowalls as material for electrochemical tranducers’ ” [Appl. Phys. Lett. 96 126102 (2010)]

Luais, Erwann; Boujtita, Mohammed; Gohier, A.; Tailleur, A.; Casimirius, S.; Djouadi, M.A.; Granier, A.

doi:10.1063/1.3357438

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…2) of the films grown for various time durations, the distance between the flakes varies from approximately 50-100 (for 30 s growth time) to 500-1,000 nm (for 600 s growth time). Now in order for the Randles-Sevcik equation to be valid, the size of the diffusion layer formed (at a particular scan rate) in the average of each ensemble of nanoflakes should be much higher than the average spacing between them [33,34]. To calculate this, we need to consider the size of the diffusion layer δ surrounding the nanoflake ensemble using the equation δ = (2D×(ΔE/ν) 1/2 ), where D is diffusion constant for the ferrocouple redox probe (7.63×10 −6 cm 2 s −1 , 1 M KCl), ΔE is the potential width of the voltammograms, and ν is the scan rate.…”

Section: Electrochemical Properties Of Flgsmentioning

confidence: 99%

Electrochemical and oxygen reduction properties of pristine and nitrogen-doped few layered graphene nanoflakes (FLGs)

Soin

Roy

Sharma

et al. 2013

J Solid State Electrochem

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Vertically aligned few layered graphene (FLGs) nanoflakes were synthesized by microwave plasma deposition for various time durations ranging from 30 to 600 s to yield graphene films of varying morphology, microstructure and areal/edge density. Their intrinsic electrochemical properties were explored using Fe(CN) 6 3−/4− and Ru(NH 3) 6 3+/2+ redox species. All the FLG electrodes demonstrate fast electron transfer kinetics with near ideal ΔEp values of 60-65 mV. Using a relationship between electron transfer rate and edge plane density, an estimation of the edge plane density was carried out which revealed a moderation of edge plane density with increase in growth time. The pristine FLGs also possess excellent electrocatalytic activity towards oxygen reduction reaction (ORR) in alkaline solutions. This ORR activity can be further enhanced by exposing the pristine FLGs to nitrogen electron cyclotron resonance plasma. The metal free N-doped FLGs exhibit much higher electrocatalytic activity towards ORR than pristine FLGs with higher durability and selectivity than Pt-based catalysts. The excellent electrochemical performance of N-doped FLGs is explained in terms of enhanced edge plane exposure, high content of pyridinic nitrogen and an increase in the electronic density of states.

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Section: Electrochemical Properties Of Flgsmentioning

confidence: 99%

Electrochemical and oxygen reduction properties of pristine and nitrogen-doped few layered graphene nanoflakes (FLGs)

Soin

Roy

Sharma

et al. 2013

J Solid State Electrochem

View full text Add to dashboard Cite

show abstract

Plasma deposition of catalytic thin films: Experiments, applications, molecular modeling

Brault

2011

Surface and Coatings Technology

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Plasma deposition of catalytic thin films is reviewed in view of highlighting some interesting features. Plasma sputtering, plasma enhanced chemical vapor deposition and plasma enhanced metalorganic chemical vapor deposition and their preferential use in various kind of catalytic films are described. Fuel cell electrodes, gas sensors and photocatalytic films are emphasized as significant applications. As example, magnetron sputtering deposition is successfuly used for growing fuel cell electrodes with high performances. Doping doped TiO2 photocatalysts are deposited using various kind of plasma depending on the expected film morphology. Gas sensors are well designed when using plasma deposition. Plasma treatment of catalysts offers a suitable altertive to thermal treatments. Finally, associated simulations, especially recent progress in molecular dynamics simulations of catalytic films growth are surveyed. This is a suitable way to understand basic mechanisms of catalytic film growth.

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Response to “Comment on ‘Carbon nanowalls as material for electrochemical tranducers’ ” [Appl. Phys. Lett. 96 126102 (2010)]

Cited by 2 publications

References 7 publications

Electrochemical and oxygen reduction properties of pristine and nitrogen-doped few layered graphene nanoflakes (FLGs)

Electrochemical and oxygen reduction properties of pristine and nitrogen-doped few layered graphene nanoflakes (FLGs)

Plasma deposition of catalytic thin films: Experiments, applications, molecular modeling

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