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. , ...Daha Fazla

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, cilt.59, sa.10, ss.4082-4090, 2020 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 59 Konu: 10
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1002/anie.201914743
  • Dergi Adı: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
  • Sayfa Sayıları: ss.4082-4090

Özet

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.