Electrochemical Behavior of Graphene in a Deep Eutectic Solvent
David Fuchs, Bernhard C. Bayer, Tushar Gupta, Gabriel L. Szabo, R. Wilhelm, Dominik Eder, Jannik C. Meyer, Sandra Steiner, Bernhard Gollas
Abstract
/Si supports, in the common DES choline chloride/ethylene glycol (12CE) under typical electrochemical conditions. We measure the graphene potential window in 12CE and estimate the apparent electron transfer kinetics of an outer-sphere redox couple. We further explore the applicability of the 12CE electrolyte to fabricate nanostructured metal (Zn) and metalloid (Ge) hybrids with graphene by electrodeposition. By comparing our graphene electrodes with common bulk glassy carbon electrodes, a key finding we make is that the two-dimensional nature of the graphene electrodes has a clear impact on DES-based electrochemistry. Thereby, we provide a first framework toward rational optimization of graphene-DES systems for electrochemical applications.