Perfluorinated cobalt phthalocyanine effectively catalyzes water electrooxidation
KAUST DepartmentCatalysis for Energy Conversion (CatEC)
Chemical Science Program
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Online Publication Date2014-12-08
Print Publication Date2015-01
Permanent link to this recordhttp://hdl.handle.net/10754/563914
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AbstractEfficient electrocatalysis of water oxidation under mild conditions at neutral pH was achieved by a fluorinated cobalt phthalocyanine immobilized on fluorine-doped tin oxide (FTO) surfaces with an onset potential at 1.7 V vs. RHE. Spectroscopic, electrochemical, and inhibition studies indicate that phthalocyanine molecular species are the operational active sites. Neither free cobalt ions nor heterogeneous cobalt oxide particles or films were observed. During long-term controlled-potential electrolysis at 2 V vs. RHE (phosphate buffer, pH 7), electrocatalytic water oxidation was sustained for at least 8 h (TON ≈ 1.0 × 105), producing about 4 μmol O2 h-1 cm-2 with a turnover frequency (TOF) of about 3.6 s-1 and no measurable catalyst degradation.
SponsorsFunding from King Abdullah University of Science and Technology Office of Competitive Research (KAUST OCRF) (award project "Design and Engineering of Photocatalytic Material Structures for Solar Hydrogen") is acknowledged with thanks.