期刊
CHEMCATCHEM
卷 2, 期 7, 页码 724-761出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201000126
关键词
oxygen evolution; photosynthesis; solar fuels; transition metals; water splitting
资金
- UniCat cluster
- European Union [516510]
- German Federal Ministry of Education and Research (BMBF) [03SF0355D, 033R018A-G]
Striving for new solar fuels, the water oxidation reaction currently is considered to be a bottleneck, hampering progress in the development of applicable technologies for the conversion of light into storable fuels. This review compares and unifies viewpoints on water oxidation from various fields of catalysis research. The first part deals with the thermodynamic efficiency and mechanisms of electrochemical water splitting by metal oxides on electrode surfaces, explaining the recent concept of the potential-determining step. Subsequently, novel cobalt oxide-based catalysts for heterogeneous (electro)catalysis are discussed. These may share structural and functional properties with surface oxides, multinuclear molecular catalysts and the catalytic manganese-calcium complex of photosynthetic water oxidation. Recent developments in homogeneous water-oxidation catalysis are outlined with a focus on the discovery of mononuclear ruthenium (and non-ruthenium) complexes that efficiently mediate O-2 evolution from water. Water oxidation in photosynthesis is the subject of a concise presentation of structure and function of the natural paragon-the manganese-calcium complex in photosystem II-for which ideas concerning redox-potential leveling, proton removal, and O-O bond formation mechanisms are discussed. The last part highlights common themes and unifying concepts.
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