Abstract
Solvent dynamics effects on the electroreduction of [PtCl3(H2O)]− at a mercury electrode are explored in the framework of Sumi–Marcus model using an efficient computational scheme. According to results of density functional calculations, the second electron transfer step may be regarded as rate controlling. The nonmonotonous influence of solvent viscosity on the reaction rate is predicted and explained in terms of the saddle point avoidance. The results of model calculations are employed to interpret experimental data reported earlier in the literature.
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Notes
The total reorganization energy for [PtCl4]2− (first electron transfer) was estimated to be smaller as compared with [PtCl3(H2O)]−.
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Acknowledgement
We are indebted to Galina A. Tsirlina for many discussions and stimulating comments. Useful discussions with Alexander M. Kuznetsov, Igor G. Medvedev, and Ilya V. Pobelov are also appreciated. This work was supported in part by the Russian Foundation for Basic Research (project no. 05-03-32381a).
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Dedicated to Professor Oleg Petrii on the occasion of his 70th birthday on August 24th, 2007
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Nazmutdinov, R.R., Bronshtein, M.D., Glukhov, D.V. et al. Modeling of solvent viscosity effects on the electroreduction of Pt(II) aquachlorocomplexes. J Solid State Electrochem 12, 445–451 (2008). https://doi.org/10.1007/s10008-007-0405-2
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DOI: https://doi.org/10.1007/s10008-007-0405-2