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Title: Fabrication of cation-doped BaTaO{sub 2}N photoanodes for efficient photoelectrochemical water splitting under visible light irradiation

A series of cation-doped BaTaO{sub 2}N particle was synthesized to control the donor density in the bulk for improving the performance of photoelectrochemical water splitting on porous BaTaO{sub 2}N photoanodes under visible light. Among the dopants (Mo{sup 6+}, W{sup 6+}, Zr{sup 4+}, and Ti{sup 4+}) examined, Mo{sup 6+} cations can be introduced into the Ta{sup 5+} site up to 5 mol. % without producing any impurity phases; the donor density of BaTaO{sub 2}N was indeed increased significantly by introducing higher ratio of Mo{sup 6+} dopant. The porous photoanodes of Mo-doped BaTaO{sub 2}N showed much higher photocurrent than others including undoped one and also exhibited much improved performance in photoelectrochemical water splitting into H{sub 2} and O{sub 2} after loaded with cobalt oxide cocatalyst and coupled with Pt counter electrode.
Authors:
; ;  [1] ;  [1] ;  [2]
  1. Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510 (Japan)
  2. (Japan)
Publication Date:
OSTI Identifier:
22499213
Resource Type:
Journal Article
Resource Relation:
Journal Name: APL Materials; Journal Volume: 3; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CATIONS; COBALT OXIDES; CONTROL; DENSITY; DOPED MATERIALS; FABRICATION; HYDROGEN; IMPURITIES; IRRADIATION; MOLYBDENUM IONS; PHOTOANODES; POROUS MATERIALS; TANTALUM IONS; TITANIUM IONS; TUNGSTEN IONS; WATER; ZIRCONIUM IONS