Raman spectroscopy and shadowgraph visualization of excess protons in high-voltage electrolysis of pure water

Elmar C. Fuchs, Doekle Yntema, Jakob Woisetschläger

Research output: Contribution to journalArticleResearchpeer-review

Abstract

In a horizontal electrohydrodynamic bridge experiment, protons are created at the anode via high-voltage electrolysis. The hydrated protons can be observed both optically using shadowgraphy and Raman spectroscopy. If the system is taken out of its electrochemical equilibrium by a sudden disruption of the bridge, excess protons remain in the anolyte. These protons are observed via an enhancement of solvated protons and their accumulation at the liquid surface, causing a residual electric field of several kV/m and a reduction of surface tension by a few mN/m as they accumulate at and escape through the surface.
Original languageEnglish
Article number365302
Number of pages10
JournalJournal of physics / D
Volume52
DOIs
Publication statusPublished - 5 Jul 2019

Keywords

  • floating water bridge, excess charge, high-voltage electrolysis, hydrated proton, electrohydrodynamic liquid bridge, Raman scattering

Fields of Expertise

  • Sonstiges

Treatment code (Nähere Zuordnung)

  • Experimental

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