气候变化领域集成服务门户(CCPortal): Unraveling compositional effects on the light-induced oxygen evolution in Bi(V-Mo-X)O4 material libraries

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DOI	10.1039/c7ee00287d
	Unraveling compositional effects on the light-induced oxygen evolution in Bi(V-Mo-X)O4 material libraries
	Gutkowski R.; Khare C.; Conzuelo F.; Kayran Y.U.; Ludwig A.; Schuhmann W.
发表日期	2017
ISSN	17545692
起始页码	1213
结束页码	1221
卷号	10 期号:5
英文摘要	The influence of co-deposited transition metals X (X = Ta, W, Nb) with various relative concentrations on the photoelectrochemical performance of BiVO4 is investigated. Thin film material libraries with well-defined composition gradients of Bi, V and two transition metals are fabricated by combinatorial sputter co-deposition. Materials with the highest photoelectrochemical performance are identified by high-throughput characterization of the Bi(V-Mo-X)O4 material libraries using an optical scanning droplet cell. Bi(V-Mo-W)O4 and Bi(V-Mo-Nb)O4 material libraries show the highest improvement in the photocurrent, with ten times higher photocurrents of up to 1 mA cm-2 compared to a BiVO4 reference material library. Deviations from the V:Bi equiatomic ratio lead to a decrease in the photocurrent for pristine monoclinic BiVO4. By the addition of transition metals this effect is minimized and no significant decrease in the photocurrent occurs up to 10 at% variation from the equiatomic V:Bi ratio. Excellent photoelectrochemical performance is reached under these conditions in regions with a V:Bi atomic ratio of 70:30 and co-deposited Nb concentrations of >10 at%. Scanning photoelectrochemical microscopy allows the evaluation of the correlation between the generated oxygen at a photoanode and the measured photocurrent. © 2017 The Royal Society of Chemistry.
英文关键词	Binary alloys; Characterization; Deposition; Electrochemistry; Libraries; Molybdenum alloys; Niobium; Niobium alloys; Photocurrents; Ternary alloys; Transition metals; Tungsten alloys; Composition gradient; Compositional effects; High through-put characterization; Photoelectrochemical performance; Reference material; Relative concentration; Scanning droplet cell; Scanning photoelectrochemical microscopy; Vanadium alloys; cells and cell components; chemical compound; concentration (composition); droplet; electrochemistry; induced response; light intensity; performance assessment; photochemistry
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190548
作者单位	Analytical Chemistry-Center for Electrochemical Science (CES), Ruhr-Universität Bochum, Universitätsstr. 150, Bochum, D-44780, Germany; Institue of Materials, Faculty of Mechanical Engineering, Ruhr-Universität Bochum, Universitätsstr. 150, Bochum, D-44780, Germany
推荐引用方式 GB/T 7714	Gutkowski R.,Khare C.,Conzuelo F.,et al. Unraveling compositional effects on the light-induced oxygen evolution in Bi(V-Mo-X)O4 material libraries[J],2017,10(5).
APA	Gutkowski R.,Khare C.,Conzuelo F.,Kayran Y.U.,Ludwig A.,&Schuhmann W..(2017).Unraveling compositional effects on the light-induced oxygen evolution in Bi(V-Mo-X)O4 material libraries.Energy & Environmental Science,10(5).
MLA	Gutkowski R.,et al."Unraveling compositional effects on the light-induced oxygen evolution in Bi(V-Mo-X)O4 material libraries".Energy & Environmental Science 10.5(2017).