A molecular catalyst for water oxidation that binds to metal oxide surfaces
| Autor: | Julianne M. Thomsen, Charles A. Schmuttenmaer, Ulrich Hintermair, Robert H. Crabtree, Stafford W. Sheehan, Gary W. Brudvig |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Energy
Multidisciplinary Oxide General Physics and Astronomy chemistry.chemical_element Nanotechnology General Chemistry Overpotential Electrocatalyst Electrochemistry Article General Biochemistry Genetics and Molecular Biology Catalysis Metal chemistry.chemical_compound chemistry Chemical engineering visual_art visual_art.visual_art_medium Iridium Solubility Electrocatalysis |
| Zdroj: | Sheehan, S W, Thomsen, J M, Hintermair, U, Crabtree, R H, Brudvig, G W & Schmuttenmaer, C A 2015, ' A molecular catalyst for water oxidation that binds to metal oxide surfaces ', Nature Communications, vol. 6, 6469, pp. 1-9 . https://doi.org/10.1038/ncomms7469 Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Molecular catalysts are known for their high activity and tunability, but their solubility and limited stability often restrict their use in practical applications. Here we describe how a molecular iridium catalyst for water oxidation directly and robustly binds to oxide surfaces without the need for any external stimulus or additional linking groups. On conductive electrode surfaces, this heterogenized molecular catalyst oxidizes water with low overpotential, high turnover frequency and minimal degradation. Spectroscopic and electrochemical studies show that it does not decompose into iridium oxide, thus preserving its molecular identity, and that it is capable of sustaining high activity towards water oxidation with stability comparable to state-of-the-art bulk metal oxide catalysts. Molecular catalysts can exhibit high activity, but their practical application may be limited by solubility and stability issues. Here, the authors report stable, direct binding of an iridium molecular catalyst to conductive oxide surfaces and demonstrate its activity for electrochemical water oxidation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|