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G‐quadruplex Nanowires To Direct the Efficiency and Selectivity of Electrocatalytic CO 2 Reduction
Author(s) -
He Lei,
Sun Xiaofu,
Zhang Hua,
Shao Fangwei
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201806652
Subject(s) - faraday efficiency , electrochemistry , selectivity , electron transfer , electrode , catalysis , g quadruplex , redox , chemistry , cobalt , electrocatalyst , nanowire , inorganic chemistry , phthalocyanine , materials science , photochemistry , nanotechnology , organic chemistry , dna , biochemistry
DNA as a medium for electron transfer has been widely used in photolytic processes but is seldom applied to dark reaction of CO 2 reduction. A G‐quadruplex nanowire (tsGQwire) assembled by guanine tetranucleotides was used to host several metal complexes and further to mediate electron transfer processes in the electrochemical reduction of CO 2 catalyzed by these complexes. The tsGQwire modified electrode increased the Faradaic efficiency of cobalt(II) phthalocyanine (Co II Pc) 2.5‐folds for CO production than bare Co II Pc electrode, with a total current density of 11.5 mA cm −2 . Comparable Faradaic efficiency of HCOOH production was achieved on tsGQwire electrode when the catalytic center was switched to a GQ targeting Ru complex. The high efficiency and selectivity of electrocatalytic CO 2 reduction was attributed to the unique binding of metal complexes on G‐quadruplex and electron transfer mediated by GQ nanowire to achieve efficient redox cycling of catalytic centers on the electrode.