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Factors affecting bismuth vanadate photoelectrochemical performance

Sinclair, Timothy S. and Winkler, Jay R. and Gray, Harry B. and Müller, Astrid M. (2014) Factors affecting bismuth vanadate photoelectrochemical performance. In: 248th American Chemical Society National Meeting & Exposition, August 10-14, 2014, San Francisco, CA.

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Bismuth vanadate has recently emerged as a promising photoanode material for solar water splitting applications. Reports on unmodified BiVO_4 showed large variations in photocurrent generation. We prepd. BiVO_4 photoanodes with different chem. surface compns. and morphologies by electrodeposition and spin coating. We devised an electrodeposition procedure with iodide added to the plating bath; this way, we could obtain BiVO_4 films with matching thicknesses and control surface Bi/V ratios. Morphologies were quantified from scanning microscopy image anal. Smaller crystallites were synthesized by spin coating. We correlated chem. surface compn. and morphol. to photocurrent densities and obsd. trends only from bivariate data. Best photoelectrochem. performance required low surface Bi/V ratios, short distances to crystallites' edges, and crystallite areas that were small enough to provide good elec. contact to the FTO underneath yet sufficiently large to prevent mass transport limitations.

Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription Website
Winkler, Jay R.0000-0002-4453-9716
Gray, Harry B.0000-0002-7937-7876
Müller, Astrid M.0000-0002-2785-6808
Additional Information:© 2014 American Chemical Society.
Record Number:CaltechAUTHORS:20140811-152908877
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48354
Deposited By: Tony Diaz
Deposited On:11 Aug 2014 23:20
Last Modified:09 Mar 2020 13:19

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