Visible-Light-Driven Photocatalytic Water Oxidation by a π-Conjugated Donor-Acceptor-Donor Chromophore/Catalyst Assembly

Yu Kyung Eom, Linda Nhon, Gyu Leem, Benjamin D. Sherman, Degao Wang, Ludovic Troian-Gautier, Soojin Kim, Jinheung Kim, Thomas J. Meyer, John R. Reynolds, Kirk S. Schanze

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

The organic chromophore 2,2′-(benzo[c][1,2,5]thiadiazole-4,7-diyl)bis(thiophene-3-carboxylic acid), T2-BTD, was prepared and investigated along with metal complex [Ru(bda)(pyP)2] (bda = 2,2′-bipyridine-6,6′-dicarboxylate; pyP = 3-(pyridine-4-yloxy)propyl)phosphonic acid), RuC, for light-driven water splitting in dye-sensitized photoelectrochemical cells. The resulting co-loaded organic chromophore plus catalyst surface assembly was evaluated by photocurrent transient measurement and direct O2 detection using a collector-generator cell. The complete SnO2/TiO2 core-shell-based photoanode exhibited an enhanced photocurrent (∼38 μA cm-2) compared to that with only the chromophore (∼24 μA cm-2). A modest Faradaic efficiency of 12% was recorded for O2 generation under 1 sun illumination in pH 3.9, 0.1 M acetate buffer solutions.

Original languageEnglish
Pages (from-to)2114-2119
Number of pages6
JournalACS Energy Letters
Volume3
Issue number9
DOIs
StatePublished - 14 Sep 2018

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© 2018 American Chemical Society.

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