首页|Electrochemical-driven water reduction and oxidation catalyzed by an iron (III) complex supported by a N2O2 ligand
Electrochemical-driven water reduction and oxidation catalyzed by an iron (III) complex supported by a N2O2 ligand
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NSTL
Elsevier
One new electrocatalyst for both water reduction and oxidation, based on an iron(III) complex, Fe-III(TAMP)Cl, is formed by the reaction of anhydrous FeCl3 with thiobis(2,1-phenylene)-bis(azanylyidene)-bis(methanylylidene)-bis-phenol (H(2)TAMP). Its structure has been determined by X-ray diffraction. A Bond-Valence Sum (BVS) model calculation was performed to assign the oxidation state of the iron center in Fe-III(TAMP)Cl. Fe-III(TAMP)Cl can electrocatalyze hydrogen evolution from a neutral electrolyte solution (pH 7.0) with a turnover frequency (TOF) of 2.43 mol of hydrogen per mole of catalyst per second (mol (mol cat)(-1) s(-1)) at an overpotential (OP) of 837 mV. Water oxidation occurs at an overpotential of 791 mV to give O-2 with a TOF of similar to 124.06 mol O-2 (mol cat)(-1) s(-1). Sustained proton reduction catalysis occurs at glassy carbon to afford H-2 over a 5 h electrolysis period with 92% Faradaic yield and no observable decomposition of Fe-III(TAMP)Cl. We hope these findings can afford a new method for the design of electrocatalysts for both water reduction and oxidation.
Iron(III) complexElectrocatalyst for water reduction and oxidationHydrogen evolutionOxygen generationAMINE-BIS(PHENOLATE) LIGANDHYDROGEN EVOLUTIONIRIDIUM COMPLEXESELECTROCATALYSTEFFICIENCY
NSTL
Elsevier
