The photoelectrochemical properties of LaFeO3 nanoparticles are discussed for the first time. Highly phase-pure LaFeO3 particles prepared by a novel ionic-liquid-based method are characterized by a (60±14) nm mean size and a band gap of (2.56±0.07) eV. Thin films deposited by screen printing exhibit photocurrent responses associated with hydrogen generation at potential up to 1 V more positive than the formal hydrogen potential. Analysis of the photocurrent responses as a function of photon flux and potential bias suggest that the hole-collection efficiency at the back contact is in competition with interfacial water oxidation.
- Hydrogen evolution
- Perovskite electrodes