Back to Search
Start Over
Ultrasmall Abundant Metal-Based Clusters as Oxygen-Evolving Catalysts.
- Source :
-
Journal of the American Chemical Society [J Am Chem Soc] 2019 Jan 09; Vol. 141 (1), pp. 232-239. Date of Electronic Publication: 2018 Dec 24. - Publication Year :
- 2019
-
Abstract
- The oxygen evolution reaction is a crucial step in water electrolysis to develop clean and renewable energy. Although noble metal-based catalysts have demonstrated high activity for the oxygen evolution reaction, their application is limited by their high cost and low availability. Here we report the use of a molecule-to-cluster strategy for preparing ultrasmall trimetallic clusters by using the polyoxometalate molecule as a precursor. Ultrafine (0.8 nm) transition-metal clusters with controllable chemical composition are obtained. The transition-metal clusters enable highly efficient oxygen evolution through water electrolysis in alkaline media, manifested by an overpotential of 192 mV at 10 mA cm <superscript>-2</superscript> , a low Tafel slope of 36 mV dec <superscript>-1</superscript> , and long-term stability for 30 h of electrolysis. We note, however, that besides the excellent performance as an oxygen evolution catalyst, our molecule-to-cluster strategy provides a means to achieve well-defined transition-metal clusters in the subnanometer regime, which potentially can have an impact on several other applications.
Details
- Language :
- English
- ISSN :
- 1520-5126
- Volume :
- 141
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Journal of the American Chemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 30540181
- Full Text :
- https://doi.org/10.1021/jacs.8b09076