A Robust, Precious-Metal-Free Dye-Sensitized Photoanode for Water Oxidation: A Nanosecond-Long Excited State Lifetime through a Prussian Blue Analogue

Ghobadi T. G. U., Ghobadi A., BÜYÜKTEMİZ M., YILDIZ E., Yildiz D. B., YAĞLIOĞLU H. G., ...More

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, vol.59, no.10, pp.4082-4090, 2020 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 59 Issue: 10
  • Publication Date: 2020
  • Doi Number: 10.1002/anie.201914743
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, L'Année philologique, Agricultural & Environmental Science Database, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Chimica, Compendex, EMBASE, MEDLINE, Veterinary Science Database
  • Page Numbers: pp.4082-4090
  • Keywords: dye-sensitization, photoelectrochemistry, Prussian blue, water oxidation, water splitting, FUNCTIONALIZED PERYLENE DIIMIDE, CYANIDE COMPLEX, COBALT, CHROMOPHORE, REDUCTION, CATALYST, FABRICATION, MIMICKING, ELECTRON, SYSTEMS
  • Gazi University Affiliated: Yes


Herein, we establish a simple synthetic strategy affording a heterogeneous, precious metal-free, dye-sensitized photoelectrode for water oxidation, which incorporates a Prussian blue (PB) structure for the sensitization of TiO2 and water oxidation catalysis. Our approach involves the use of a Fe(CN)(5) bridging group not only as a cyanide precursor for the formation of a PB-type structure but also as an electron shuttle between an organic chromophore and the catalytic center. The resulting hetero-functional PB-modified TiO2 electrode demonstrates a low-cost and easy-to-construct photoanode, which exhibits favorable electron transfers with a remarkable excited state lifetime on the order of nanoseconds and an extended light absorption capacity of up to 500 nm. Our approach paves the way for a new family of precious metal-free robust dye-sensitized photoelectrodes for water oxidation, in which a variety of common organic chromophores can be employed in conjunction with CoFe PB structures.