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Fast and persistent electrocatalytic water oxidation by Co-Fe Prussian blue coordination polymers
Sara Pintado1, Sara Goberna-Ferrón, Eduardo C Escudero-Adán
1Institute of Chemical Research of Catalonia (ICIQ) , Av. Paisos Catalans 16, E-43007 Tarragona, Spain.
Journal of the American Chemical Society
|August 28, 2013
Summary
A novel cobalt hexacyanoferrate (CoHCF) coordination polymer demonstrates efficient and stable water oxidation catalysis. This breakthrough offers a promising, inexpensive catalyst for artificial photosynthesis and solar fuel production.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Artificial photosynthesis requires efficient, robust, and inexpensive water oxidation catalysts (WOCs).
- Current WOCs face challenges in stability and cost-effectiveness for technological development.
Purpose of the Study:
- To report the catalytic activity of a cobalt hexacyanoferrate (CoHCF) Prussian blue-type coordination polymer as a WOC.
- To evaluate the performance and stability of CoHCF under relevant conditions.
Main Methods:
- Synthesis and characterization of cobalt hexacyanoferrate (CoHCF).
- Electrochemical testing of CoHCF's water oxidation catalytic activity.
- Long-term stability assessment at neutral pH and ambient conditions.
Main Results:
- CoHCF exhibits competitive catalytic activity compared to state-of-the-art metal oxides.
- The material demonstrates unparalleled long-term stability, maintaining constant rates for weeks.
- CoHCF possesses desirable properties of molecule-based materials: transparency, porosity, flexibility, processability, and low density.
Conclusions:
- Cobalt hexacyanoferrate (CoHCF) is a promising WOC candidate.
- Its unique properties make it suitable for advancing solar fuels production.
- CoHCF offers a potential solution to the challenge of efficient and stable water oxidation catalysis.
