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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received March 4, 2002
Accepted April 4, 2002

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Combinatorial Electrochemical Synthesis and Characterization of Tungsten-Molybdenum Mixed Metal Oxides

Sung Hyeon Baeck Eric W. McFarland^†

Department of Chemical Engineering, University of California, Santa Barbara, California 93106-5080, USA

mcfar@engineering.ucsb.edu

Korean Journal of Chemical Engineering, July 2002, 19(4), 593-596(4), 10.1007/BF02699301

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Abstract

Automated systems for electrochemical synthesis and high throughput screening of photoelectrochemical materials were developed and used to prepare tungsten-molybdenum mixed metal oxides, WO3-MoO3. Two-dimensional arrays (library) of diverse composition were synthesized by automated cathodic electrodeposition on Ti foil substrate. Electrolytes were prepared by mixing W-peroxo complex and Mo-peroxo complex. The compositions in films_x000D_ were found to strongly depend on the composition of electrolyte, and found to be relatively independent of deposition voltage. The morphology was found to be very homogeneous. The electrodeposited oxides typically showed n-type behavior. Automated measurement of photocurrent by using a scanning photoelectrochemical cell showed that mixed oxides showed higher photocatalytic activity than pure tungsten oxide or pure molybdenum oxide. Photoactitvities_x000D_ of the mixed oxides were strongly dependent on the film composition.

Keywords

Combinatorial Synthesis WO3-MoO3 Mixed Oxide Electrodeposition Photocurrent High Throughput Screening

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