Chloride-oxygen electrolytic cell for a regenerative fuel cell using hypochlorous acid as an oxidant

keyword: Regenerative fuel cells

LCSH: Electrolytic cells -- Performance

; Hypochlorous acid

; Chloride ions

; Hydrogen fuel cells

; Electrochemical energy conversion

Abstract: A regenerative fuel cell using hypochlorous acid as the oxidant consisted of a hydrogen-hypochlorous acid fuel cell, a hydrogen-chlorine fuel cell, and a Cl-O₂ electrolytic cell. This research aims to produce hypochlorite as a fuel for the regenerative fuel cell using an electrolytic cell. The electrolytic cell is composed of a chloride-ion anode and an oxygen cathode. By adjusting the pH of the oxidant solution, hypochlorite is converted to hypochlorous acid and circulated back to the first fuel cell. Therefore, the performance in converting chloride ions to hypochlorous acid is one of the key factors of this regenerative fuel cell. In this research, the influences of three parameters—the applied potential on the electrolytic cell (1.10-1.50 V), circulation of the hypochlorite (1 and 2 cycles), and sodium chloride to sodium hydroxide molar ratio (NaCl:NaOH of 1:0-1:1) in the solution—on hypochlorous acid production via the chloride-oxygen electrolytic cell were studied. It was found that the suitable operating condition for this electrolytic cell was a potential of 1.30 V and a NaCl:NaOH ratio of 1:1, giving 30.60% conversion of chloride ions to hypochlorite for one product circulation. In addition, the conversion increased when the circulation was increased to two cycles.

King Mongkut's University of Technology North Bangkok. Central Library

Address: BANGKOK

Email: library@kmutnb.ac.th

Created: 2021

Modified: 2026-02-03

Issued: 2026-02-03

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BibliograpyCitation : In Thai Institute of Chemical Engineering and Applied Chemistry. The 30th Thai Institute of Chemical Engineering and Applied Chemistry Conference (TIChE 2021) (ESD09). Nakhon Ratchasima : Suranaree University of Technology

eng

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