Stabilized CdSe-CoPi composite photoanode for light-assisted water oxidation by transformation of a CdSe/cobalt metal thin film

Publication Type:

Journal Article

Source:

ACS Appl. Mater. Interfaces, ACS Publications, Volume 5, Issue 7, p.2364-2367 (2013)

ISBN:

1944-8244

Keywords:

2013, 2013 and earlier

Abstract:

Integration of water splitting catalysts with visible-light-absorbing semiconductors would enable direct solar-energy-to-fuel conversion schemes
such as those based on water splitting. A disadvantage of some common
semiconductors that possess desirable optical bandgaps is their chemical
instability under the conditions needed for oxygen evolution reaction
(OER). In this study, we demonstrate the dual benefits gained from using a
cobalt metal thin-film as the precursor for the preparation of
cobalt-phosphate (CoPi) OER catalyst on cadmium chalcogenide photoanodes.
The cobalt layer protects the underlying semiconductor from oxidation and
degradation while forming the catalyst and simultaneously facilitates the
advantageous incorporation of the cadmium chalcogenide layer into the CoPi
layer during continued processing of the electrode. The resulting hybrid
material forms a stable photoactive anode for light-assisted water
splitting.