ZB 06 - Nanoelectrochemistry (W.Nogala)

SECM study of hydrogen photogeneration in a 1,2-dichloroethane vertical water biphasic system with decamethylruthenocene electron donor regeneration

Author(s): Jedraszko, Justyna and Adamiak, Wojciech and Nogala, Wojciech and Girault, Hubert H. and Opallo, Marcin
Title: SECM study of hydrogen photogeneration in a 1,2-dichloroethane vertical water biphasic system with decamethylruthenocene electron donor regeneration
Abstract: This paper reports light driven hydrogen evolution reaction (HER) at vertical bar water (DCE vertical bar W) interface photoexcited decamethylruthenocene (DMRc) as electron donor. DMRc in situ regenerated by electroreduction of its oxidized form formed during HER as a by-product. This enables continuous HER small amount of DMRc. Proton transfer from the acidic aqueous to the DCE phase is ensured by negative chemical polarization of liquid vertical bar liquid interface. The reduction of protons in occurs only after excitation of DMRc by light. Voltammetry performed the organic droplet-modified glassy carbon electrode immersed in aqueous electrolyte solution of various anions, indicated that of DMRc is followed by an anion insertion from water into the phase. We demonstrate that DMRc can be electrochemically at the microelectrode positioned close to the interface two immiscible electrolyte solutions CITIES) by the scanning microscopy. Regeneration of the electron donor allows development of biphasic system towards continuous hydrogen generation platform.
Pages: 101-106
Journal: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Publisher: ELSEVIER SCIENCE SA
Addres: PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Volume: 819
ID: ISI:000435619700014
Year: 2018
DOI: 10.1016/j.jelechem.2017.09.026