Cathodic shift in onset potential of solar oxygen evolution on hematite by 13-group oxide overlayers
Year: 2011
Type: article
Abstract: The onset potential of photoelectrochemical water oxidation on ultrathin hematite was improved by up to 200 mV by the chemical bath deposition of 13-group oxides as overlayers. It is proposed that the corundum-type overlayers released lattice strain of the ultrathin hematite layer and decreased the density of surface states. Particularly, a Ga2O3 overlayer exhibited an enhanced photocurrent attributed to stoichiometric water splitting near the onset potential. The photocurrent was sustained over a day, attesting to its outstanding performance and durability for water splitting.
Source: Energy & Environmental Science
DOI: 10.1039/c1ee01194d
Institution: École Polytechnique Fédérale de Lausanne
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Funder: European Commission
OpenAlex ID: W2043954122