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Inne
Electrocatalytic water oxidation influenced by the ratio between Cu2+ and a multiply branched peptide ligand.
Autorzy
Rok wydania
2019
Czasopismo
Numer woluminu
122
Strony
5-9
DOI
10.1016/j.catcom.2019.01.004
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
A multiply branched peptide, H-Gly-Dap(H-Gly)-Dap(H-Gly-Dap(H-Gly))-Gly-NH2 (Dap = L-2,3-diaminopropionic acid) has been designed to furnish multi-Cu2+ centers exhibiting electrocatalytic activity in water oxidation. Each branching moiety serves as binding pocket for one cupric ion. UV–vis, CD and EPR spectroscopy suggest {NH2,N−,N−,NH2}eq set for the first two coordinated Cu2+ ions, whereas a different mode for the third that in turn changes the electrochemical behavior of the complex. This third Cu2+ triggers water oxidation at lower (~60 mV) overpotential, increased catalytic current and 4 times as high O2evolution rate compared to the 2:1 metal-to-ligand stoichiometry.
Słowa kluczowe
Copper, Water oxidation, Peptide, Branched peptide
Adres publiczny
http://dx.doi.org/10.1016/j.catcom.2019.01.004
Strona internetowa wydawcy
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