Phys Chem Chem Phys. 2013 Jun 21;15(23):9315-25. doi: 10.1039/c3cp50890k. Epub 2013 May 10.

Chronoamperometric study of membrane electrode assembly operation in continuous flow photoelectrochemical water splitting.

Physical chemistry chemical physics : PCCP

Jan Rongé, Dorien Nijs, Stef Kerkhofs, Kasper Masschaele, Johan A Martens

PMID: 23660956 DOI: 10.1039/c3cp50890k

Abstract

Water splitting was performed in a photoelectrochemical cell (PEC) with water oxidation and hydrogen formation reactions in two separate compartments. A photoanode consisting of carbon paper loaded with TiO2 and a cathode made of Pt dispersed on carbon black spread also on carbon paper were fixed on both sides of a Nafion® membrane and electrically coupled via an external circuit. Anode and cathode compartments with serpentine flow field were operated either in the liquid or vapour phase. Electrical current was monitored with chronoamperometry and D2 formation from deuterated water using mass spectrometry. Mapping the photocurrent under a variety of reaction conditions enabled identification of the limiting factors related to proton and photocarrier transport and reaction product evacuation. This comprehensive research approach to the operation of a PEC will assist future optimisation of cell design and development of membrane electrode assemblies.

Publication Types

• Journal Article