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Precious Metal‐Free Photocatalytic Water Oxidation by a Layered Double Hydroxide‐Prussian Blue Analogue Hybrid Assembly
Author(s) -
Akbari Sina Sadigh,
Karadas Ferdi
Publication year - 2021
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.202002279
Subject(s) - prussian blue , photocatalysis , hydroxide , water splitting , materials science , catalysis , layered double hydroxides , electrochemistry , visible spectrum , chemical engineering , metal , semiconductor , photochemistry , inorganic chemistry , nanotechnology , chemistry , electrode , optoelectronics , organic chemistry , metallurgy , engineering
The development of earth‐abundant photocatalytic assemblies has been one of the bottlenecks for the advancement of scalable water splitting cells. In this study, a ZnCr layered double hydroxide and a CoFe Prussian blue analogue are combined to afford an earth‐abundant photocatalytic assembly involving a visible light‐absorbing semiconductor (SC) and a water oxidation catalyst (WOC). Compared to bare ZnCr‐LDH, the SC‐WOC hybrid assembly exhibits a threefold enhancement in photocatalytic activity, which is maintained for 6 h under photocatalytic conditions at pH 7. The band energy diagram was extracted from optical and electrochemical studies to elucidate the origin of the enhanced photocatalytic performance. This study marks a straightforward pathway to develop low‐cost and precious metal‐free assemblies for visible light‐driven water oxidation.