title: Chronoamperometric study of membrane electrode assembly operation in continuous flow photoelectrochemical water splitting.
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.
authors: KU Leuven, Centre for Surface Chemistry and Catalysis, Leuven B-3001, Belgium.
authors: Jan
authors: J
authors: Rongé
authors: Dorien
authors: D
authors: Nijs
authors: Stef
authors: S
authors: Kerkhofs
authors: Kasper
authors: K
authors: Masschaele
authors: Johan A
authors: JA
authors: Martens