Dissolution of Pt and Its Temperature Dependence in Anhydrous Acetonitrile- and Methanol-Based Electrolytes

Ranninger J, Nikolaienko P, Wachs S, Möller J, Mayrhofer K, Berkes B (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Book Volume: 167

Journal Issue: 12

DOI: 10.1149/1945-7111/abb27d

Abstract

Electrode stability is a crucial performance criterion in electrochemistry. Interestingly, in certain fields of electrochemistry, especially when using nonaqueous electrolytes, like in electroorganic synthesis, this aspect remained largely out of focus of investigations so far. Regarding the handling and particularly the purification of nonaqueous electrolytes and the applicable analytical methods to study stability, such fundamental investigations are usually more complicated than in aqueous electrolytes. Herein, we present stability data of Pt metal, as one of the most frequently used electrodes in electroorganic synthesis, in anhydrous (ppm level) acetonitrile- and methanol-based electrolytes in the usually applied potential ranges, obtained using an electroanalytical flow cell (EFC) coupled to an inductively coupled plasma mass spectrometer (ICP-MS). Both electrolyte solvents are widely used in nonaqueous electrochemistry and possess different physico-chemical properties. Here we chose them as representative examples of aprotic and protic solvents and as solvent molecules with two different electrochemical activities: acetonitrile with a wide stability window and methanol being a rather easily oxidizable molecule. A temperature study reveals not only the different electrochemical behavior of the electrolyte systems but also significant differences in Pt dissolution in the studied electrolytes.

Authors with CRIS profile

Involved external institutions

Forschungszentrum Jülich / Research Centre Jülich (FZJ) Germany (DE)

How to cite

APA:

Ranninger, J., Nikolaienko, P., Wachs, S., Möller, J., Mayrhofer, K., & Berkes, B. (2020). Dissolution of Pt and Its Temperature Dependence in Anhydrous Acetonitrile- and Methanol-Based Electrolytes. Journal of The Electrochemical Society, 167(12). https://doi.org/10.1149/1945-7111/abb27d

MLA:

Ranninger, Johanna, et al. "Dissolution of Pt and Its Temperature Dependence in Anhydrous Acetonitrile- and Methanol-Based Electrolytes." Journal of The Electrochemical Society 167.12 (2020).

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