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La 5 Ti 2 Cu 0.9 Ag 0.1 S 5 O 7 Modified with a Molecular Ni Catalyst for Photoelectrochemical H 2 Generation
Author(s) -
Rosser Timothy E.,
Hisatomi Takashi,
Sun Song,
AntónGarcía Daniel,
Minegishi Tsutomu,
Reisner Erwin,
Domen Kazunari
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201801169
Subject(s) - photocathode , catalysis , yield (engineering) , materials science , semiconductor , nanotechnology , optoelectronics , chemical engineering , inorganic chemistry , chemistry , physics , metallurgy , organic chemistry , quantum mechanics , engineering , electron
The stable and efficient integration of molecular catalysts into p ‐type semiconductor materials is a contemporary challenge in photoelectrochemical fuel synthesis. Here, we report the combination of a phosphonated molecular Ni catalyst with a TiO 2 ‐coated La 5 Ti 2 Cu 0.9 Ag 0.1 S 5 O 7 photocathode for visible light driven H 2 production. This hybrid assembly provides a positive onset potential, large photocurrents, and high Faradaic yield for more than three hours. A decisive feature of the hybrid electrode is the TiO 2 interlayer, which stabilizes the oxysulfide semiconductor and allows for robust attachment of the phosphonated molecular catalyst. This demonstration of an oxysulfide‐molecular catalyst photocathode provides a novel platform for integrating molecular catalysts into photocathodes and the large photovoltage of the presented system makes it ideal for pairing with photoanodes.