Diffusion regimes at nanoelectrode ensembles in different ionic liquids

TLDR: In this article, the electrochemical and diffusion behavior of different redox probes in different ionic liquids is studied at gold nanoelectrode ensembles (NEEs) in comparison with millimetre sized gold (Au-macro) and glassy carbon (GC) disk electrodes.

About: This article is published in Electrochimica Acta.The article was published on 2010-03-01 and is currently open access. It has received 34 citations till now. The article focuses on the topics: Diffusion & Ionic liquid.

Figures

Fig. 5. Cyclic voltammograms recorded at different scan rates at a NEE (geometric area 0.07 cm2; active area 0.004 cm2): (A) 20mM Fc [BMPy][N(Tf)2]; (B) 5mM Fc in [BMIm][N(Tf)2]; (C) 50mM Fc [P14,666][N(Tf)2]. Scan rates: full line 5mV/s; dashed line 50mVs−1; dotted line 500mV/s.

Fig. 6. Dependence of the I/Imax ratio on the scan rate (A) and on the square root of the scan rate (B) for ferrocene oxidation at a NEE in: ( ) [BMPy][N(Tf)2]; (©) [BMIm][N(Tf)2]; ( ) [P14,666][N(Tf)2].

Table 1 Surveys of the literature data on the viscosities, , of the studied ionic liquids.

Fig. 7. (A) Cyclic voltammograms of 1mM FcCOO− in [BMPy][N(Tf2)] recorded a l (

Fig. 1. SEM image of a NEE.

Fig. 2. (A) Cyclic voltammograms of 1mM Fc in [BMIm][N(CN)2] recorded at GCE (geometric area 0.19 cm2) at different scan rates: 20, 50, 100, 200, 500, 1000mVs−1; peak currents scale with the scan rate. (B) Dependence of the anodic peak current on the square root of the scan rate.

Frequently asked questions

Q1. What have the authors contributed in "Iffusion regimes at nanoelectrode ensembles in different ionic liquids" ?

The electrochemical and diffusion behaviour of different redox probes in different ionic liquids is studied at gold nanoelectrode ensembles ( NEEs ) in comparison with millimetre sized gold ( Au-macro ) and glassy carbon ( GC ) disk electrodes. The ILs are the dicyanamide, [ N ( CN ) 2 ] or bis ( trifluoromethylsulfonyl ) amide ), [ N ( Tf ) 2 ] salts of the following cations: 1-butyl-3-methylimidazolium, [ BMIm ], 1-butyl-3-methylpyrrolidonium, [ BMPy ], or tris ( nhexyl ) tetradecylphosphonium [ P14,666 ]. For this reason the diffusion at gold NEEs is studied only in the former ILs.