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Chemically Deposited Cobalt‐Based Oxygen‐Evolution Electrocatalysts on DOPA‐Displaying Viruses
Author(s) -
Rho Jihun,
Lim Sung Yul,
Hwang Inseong,
Yun Jeongse,
Chung Taek Dong
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201701111
Subject(s) - overpotential , cobalt , catalysis , oxygen evolution , cobalt oxide , x ray photoelectron spectroscopy , electrochemistry , chemistry , oxide , oxygen , chemical engineering , materials science , inorganic chemistry , organic chemistry , electrode , engineering
Filamentous bacteriophages were engineered to display 3,4‐dihydroxy‐ l ‐phenylalanine (DOPA) onto which a cobalt oxide based oxygen‐evolution catalyst (Co‐OEC) spontaneously deposited at room temperature. Relative to the electrodeposited Co‐OEC, the catalyst formed on the virus exhibited improved durability and current density in a small overpotential region, as well as decreased oxidation states for the formation of Co(OH) 2 , as confirmed by electrochemical and X‐ray photoelectron spectroscopy analysis. Chemically deposited Co(OH) 2 on the virus was oxidized to CoOOH during the water‐oxidation process. Thus, the DOPA‐displaying virus illustrates the affordability of a genetically engineered bacteriophage as a molecular support that can improve the catalytic performance of inorganic materials without any additional electrical energy.