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Electrochemical Water Oxidation by a Catalyst‐Modified Metal–Organic Framework Thin Film
Author(s) -
Lin Shaoyang,
PinedaGalvan Yuliana,
Maza William A.,
Epley Charity C.,
Zhu Jie,
Kessinger Matthew C.,
Pushkar Yulia,
Morris Amanda J.
Publication year - 2017
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.201601181
Subject(s) - electrocatalyst , water splitting , electrochemistry , catalysis , cyclic voltammetry , metal organic framework , inorganic chemistry , chemistry , artificial photosynthesis , oxygen evolution , bioelectrochemistry , chemical engineering , materials science , electrode , organic chemistry , photocatalysis , adsorption , engineering
Water oxidation, a key component in artificial photosynthesis, requires high overpotentials and exhibits slow reaction kinetics that necessitates the use of stable and efficient heterogeneous water‐oxidation catalysts (WOCs). Here, we report the synthesis of UiO‐67 metal–organic framework (MOF) thin films doped with [Ru(tpy)(dcbpy)OH 2 ] 2+ (tpy=2,2′:6′,2′′‐terpyridine, dcbpy=5,5′‐dicarboxy‐2,2′‐bipyridine) on conducting surfaces and their propensity for electrochemical water oxidation. The electrocatalyst oxidized water with a turnover frequency (TOF) of (0.2±0.1) s −1 at 1.71 V versus the normal hydrogen electrode (NHE) in buffered solution (pH∼7) and exhibited structural and electrochemical stability. The electroactive sites were distributed throughout the MOF thin film on the basis of scan‐ratedependent voltammetry studies. This work demonstrates a promising way to immobilize large concentrations of electroactive WOCs into a highly robust MOF scaffold and paves the way for future photoelectrochemical water‐splitting systems.