Busser G Wilma, Mei Bastian, Pougin Anna, Strunk Jennifer, Gutkowski Ramona, Schuhmann Wolfgang, Willinger Marc-Georg, Schlögl Robert, Muhler Martin
Laboratory of Industrial Chemistry, Ruhr-Universität Bochum, Universitätsstr. 150, 44780 Bochum (Germany), Fax: (+49) 0234-32-14115.
ChemSusChem. 2014 Apr;7(4):1030-4. doi: 10.1002/cssc.201301065. Epub 2014 Mar 3.
Split second: The photocatalytic activity of gallium oxide (β-Ga2 O3) depends strongly on the co-catalysts CuOx and chromia, which can be efficiently deposited in a stepwise manner by photoreduction of Cu(2+) and CrO4 (2-). 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 CuOx : it is essential for the oxidation of water.
氧化镓（β-Ga2O3）的光催化活性强烈依赖于助催化剂氧化铜和氧化铬，通过光还原Cu(2+)和CrO4(2-)，它们可以以逐步的方式有效沉积。通过在0.025-1.5 wt %范围内改变铜负载量，可以调节水分解活性，而只要存在少量（如0.05 wt %）的铬负载量，就不会影响反应速率。在氧化铜存在的情况下，氧化铬被确定为高效助催化剂：它对于水的氧化至关重要。
