Inside Back Cover: Activation of Ultrathin Films of Hematite for Photoelectrochemical Water Splitting via H2 Treatment (ChemSusChem 9/2015). Issue 9 (4th May 2015)

• Record Type: Journal Article
• Authors: Moir, Jonathon; Soheilnia, Navid; Liao, Kristine; O'Brien, Paul; Tian, Yao; Burch, Kenneth S.; Ozin, Geoffrey A.
• Is Part Of: ChemSusChem. Volume 8:Issue 9(2015:May)
• Page Start: 1627
• Page End: 1627
• Publication Date: 2015-05-04
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201500342
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="graphical" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The Inside Back cover picture shows ultrathin films of α‐Fe₂O₃ before and after treatment in 5 % H₂ in Ar at 450 °C. The hydrogen treatment creates oxygen vacancies in the iron oxide lattice, resulting in a non‐stoichiometric hematite phase that is active for photoelectrochemical water oxidation. Electrochemical impedance spectroscopy reveals the buildup of a surface state capacitance that is only present for the hydrogen treated films when under illumination, at the point of photocurrent onset. A concomitant decrease in charge trapping resistance suggests that this is due to a build‐up of photogenerated holes at the surface of the H₂‐treated films, which allows the water oxidation reaction to proceed. More details can be found in the Full Paper by Moir et al. on page 1557 (DOI: <ext-link ext-link-type="doi" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink">10.1002/cssc.201402945</ext-link>).<graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgjm6shn4k" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></p> </abstract>