Diminished Electron Transfer Kinetics for [Ru(NH3)6]3+/2+, [α-SiW12O40]4–/5–, and [α-SiW12O40]5–/6– Processes at Boron-Doped Diamond Electrodes
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2015-05-01 |
| Journal | The Journal of Physical Chemistry C |
| Authors | Kiran Bano, Jie Zhang, Alan M. Bond, Patrick R. Unwin, Julie V. Macpherson |
| Institutions | Monash University, University of Warwick |
| Citations | 23 |
Abstract
Section titled “Abstract”Heterogeneous electron transfer rate constants (k0 values) at a boron-doped diamond (BDD) electrode (10-2 cm s-1 range) that are more than an order of magnitude smaller than found at metal or glassy carbon (GC) electrodes (≥2.0 cm s-1) are reported for the outer-sphere [Ru(NH3)6]3+/2+, [α-SiW12O40]4-/5-, and [α-SiW12O40]5-/6- redox couples in aqueous electrolyte media. The k0 values and other parameters relevant to electrode kinetics were derived from analysis of the higher-order harmonic components available in Fourier transformed large amplitude alternating current voltammetry at BDD, GC, and platinum (Pt) or gold (Au) electrodes for the reduction of highly positively charged [Ru(NH3)6]3+ and highly negatively charged Keggin-type silicon tungstate ([α-SiW12O40]4- and [α-SiW12O40]5-). The slower electron transfer kinetics at the BDD electrode, relative to the other electrode materials, are discussed in terms of the double layer, density of states, and other factors.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
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