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Constructing Chemical Interaction between Hematite and Carbon Nanosheets with Single Active Sites for Efficient Photo‐Electrochemical Water Oxidation
Author(s) -
Yang Gaoliang,
Li Yunxiang,
Lin Huiwen,
Ren Xiaohui,
Philo Davin,
Wang Qi,
He Yu,
Ichihara Fumihiko,
Luo Shunqin,
Wang Shengyao,
Ye Jinhua
Publication year - 2020
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.202000577
Subject(s) - photocurrent , hematite , electrochemistry , water splitting , materials science , nickel , carbon fibers , electrode , reversible hydrogen electrode , anode , chemical engineering , nanotechnology , photocatalysis , inorganic chemistry , catalysis , chemistry , optoelectronics , working electrode , composite number , engineering , composite material , biochemistry , metallurgy
Addressing the intrinsic charge recombination of hematite (α‐Fe 2 O 3 ) is significantly important for achieving highly efficient photo‐electrochemical water oxidation but still remains challenging. Herein, this challenge is tackled by constructing chemical interaction at the interface of α‐Fe 2 O 3 and carbon nanosheets with single‐nickel sites (Ni‐NC), which can accelerate the reaction kinetics by providing additional charge transport channels and abundant active sites. The interfacial carrier path induced by the chemical coupling and the efficient single‐nickel sites work collaboratively, achieving an impressive photocurrent density of 1.85 mA cm −2 at 1.23 V versus reversible hydrogen electrode (RHE), up to 2.2 times higher than that of pure α‐Fe 2 O 3 . These findings shed light on an interface modulation strategy and provide an alternative toward utilizing unique single active sites for efficient photo‐electrochemical water splitting.