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Protein Film Infrared Electrochemistry Demonstrated for Study of H2 Oxidation by a [NiFe] Hydrogenase
Published on: December 4, 2017
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Hydrogen evolution catalyzed by an iron polypyridyl complex in aqueous solutions
G P Connor1, K J Mayer, C S Tribble
1Department of Chemistry, College of William and Mary , PO Box 8795, Williamsburg, Virginia 23187-8795, United States.
Inorganic Chemistry
|May 23, 2014
Summary
Iron complexes with tetradentate monophenolate ligands efficiently catalyze proton reduction to hydrogen gas. Water enhances this electrocatalyst
Area of Science:
- Inorganic Chemistry
- Electrochemistry
- Catalysis
Background:
- Iron complexes with tetradentate monophenolate ligands are investigated for electrocatalytic applications.
- Proton reduction to hydrogen gas is a key area in sustainable energy research.
Purpose of the Study:
- To evaluate the electrocatalytic activity of iron complexes with tetradentate monophenolate ligands for hydrogen evolution.
- To investigate the effect of water on the catalytic performance.
Main Methods:
- Electrochemical studies using cyclic voltammetry and chronoamperometry.
- Catalyst characterization in acetonitrile and aqueous buffer solutions.
Main Results:
- High catalytic activity for proton reduction to H2 at -1.17 V vs SCE.
- Turnover frequencies up to 1000 s(-1) in CH3CN, enhanced to 3000 s(-1) in the presence of water.
- Excellent performance in aqueous buffers (pH 3-5) with 98% Faradaic efficiency.
Conclusions:
- Iron-based catalysts show significant promise for efficient electrocatalytic hydrogen production.
- Water addition enhances catalyst activity, suggesting potential for aqueous-phase applications.
- These findings contribute to the development of advanced electrocatalysts for renewable energy.
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