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Immobilization of a Molecular Ruthenium Catalyst on Hematite Nanorod Arrays for Water Oxidation with Stable Photocurrent
Author(s) -
Fan Ke,
Li Fusheng,
Wang Lei,
Daniel Quentin,
Chen Hong,
Gabrielsson Erik,
Sun Junliang,
Sun Licheng
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201500730
Subject(s) - photocurrent , hematite , nanorod , water splitting , ruthenium , materials science , catalysis , chemical engineering , nanomaterials , nanotechnology , photoelectrochemical cell , photocatalysis , inorganic chemistry , chemistry , electrode , electrolyte , optoelectronics , organic chemistry , engineering , metallurgy
Photoelectrochemical (PEC) cells for light‐driven water splitting are prepared using hematite nanorod arrays on conductive glass as the photoanode. These devices improve the photocurrent of the hematite‐based photoanode for water splitting, owing to fewer surface traps and decreased electron recombination resulting from the one‐dimensional structure. By employing a molecular ruthenium co‐catalyst, which contains a strong 2,6‐pyridine‐dicarboxylic acid anchoring group at the hematite photoanode, the photocurrent of the PEC cell is enhanced with high stability for over 10 000 s in a 1 m KOH solution. This approach can pave a route for combining one‐dimensional nanomaterials and molecular catalysts to split water with high efficiency and stability.