Decoration of the layered manganese oxide birnessite with Mn(II/III) gives a new water oxidation catalyst with fifty-fold turnover number enhancement

The role of the manganese average oxidation state (AOS) in water oxidation catalysis by birnessite was investigated. Low AOS samples were most active, generating O2 immediately. Samples with a relatively high AOS showed an initial induction period and decreased turnover. Mn(ii- and iii)-enriched sam...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2015-01, Vol.44 (29), p.12981-12984
Main Authors: McKendry, Ian G, Kondaveeti, Sandeep K, Shumlas, Samantha L, Strongin, Daniel R, Zdilla, Michael J
Format: Article
Language:English
Subjects:
Catalysis
catalysis (heterogeneous), solar (photovoltaic), energy storage (including batteries and capacitors), hydrogen and fuel cells, defects, mechanical behavior, materials and chemistry by design, synthesis (novel materials)
Catalysts
Decoration
Manganese
Manganese oxides
Oxidation
Valence
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Summary:The role of the manganese average oxidation state (AOS) in water oxidation catalysis by birnessite was investigated. Low AOS samples were most active, generating O2 immediately. Samples with a relatively high AOS showed an initial induction period and decreased turnover. Mn(ii- and iii)-enriched samples gave a 10-50 fold enhancement in turnover number.
ISSN:1477-9226
1477-9234
DOI:10.1039/c5dt01436k