Photodeposition of Copper and Chromia on Gallium Oxide: The Role of Co‐Catalysts in Photocatalytic Water Splitting. Issue 4 (3rd March 2014)

• Record Type: Journal Article
• Authors: Busser, G. Wilma; Mei, Bastian; Pougin, Anna; Strunk, Jennifer; Gutkowski, Ramona; Schuhmann, Wolfgang; Willinger, Marc‐Georg; Schlögl, Robert; Muhler, Martin
• Is Part Of: ChemSusChem. Volume 7:Issue 4(2014:Apr.)
• Page Start: 1030
• Page End: 1034
• Publication Date: 2014-03-03
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201301065
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="graphical" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <bold>Split second:</bold> The photocatalytic activity of gallium oxide (β‐Ga₂O₃) depends strongly on the co‐catalysts CuO_{<italic>x</italic>} and chromia, which can be efficiently deposited in a stepwise manner by photoreduction of Cu²⁺ and CrO₄²⁻. The water‐splitting activity can be tuned by varying the Cu loading in the range 0.025–1.5 wt %, whereas the Cr loading is not affecting the rate as long as small amounts (such as 0.05 wt %) are present. Chromia is identified as highly efficient co‐catalyst in the presence of CuO_{<italic>x</italic>}: it is essential for the oxidation of water.<boxed-text content-type="graphic" position="anchor" orientation="portrait"><graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgg537k4jb3" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></boxed-text></p> </abstract>