BIAN-Fluorene Copolymer Bearing Ruthenium Pendant as Sensitizer of Titanium Nanotubes for Photocatalytic Hydrogen Evolution. Issue 15 (29th September 2018)

• Record Type: Journal Article
• Authors: Patnaik, S. G.; Gagan, R. K.; Vedarajan, R.; Yamaguchi, A.; Miyauchi, M.; Matsumi, N.
• Is Part Of: Journal of the Electrochemical Society. Volume 165:Issue 15(2018)
• Page Start: J3166
• Page End: J3172
• Publication Date: 2018-09-29
• Subjects: Electrocatalysis -- conjugated polymers -- hydrogen evolution -- photo-electrochemical water splitting; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0231815jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : We describe ruthenium coordinated n-type polymer material as a sensitizer for TiO2 nanotubes for visible light driven photocatalytic production of hydrogen. The dye is a novel ruthenium coordinated BIAN (bisiminoacenaphthene)-Fluorene (2, 7-Diethynyl-9, 9-dioctyl-9H-fluorene) polymer. Photoresponse of the material was observed by measuring the changes in the open circuit potential voltage which showed a vertical drop of 0.57 V in the potential. From the I-V characteristics, the maximum value of photocurrent observed in the presence of visible light was 245 μA. The monitoring of rate of H2 evolution exhibited as high as 3.75 μmol/hour of H2 with the dye sensitized TiO2 nanotubes at a low bias potential of 0.15V (vs Ag/AgCl), compared to only 2.1 μmol/hour in case of bare TiO2 nanotubes even at higher bias potential of 0.5V. This shows the material has got the potential as a photocatalyst in the photoelectrochemical splitting of water.