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Morphology and Electrochemistry of Ruthenium/Carbon Aerogel Nanostructures
Abstract
The structure−property relationships of nanostructured Ru/carbon aerogel composite materials have been evaluated. These new materials were prepared via a novel two-step metal vapor impregnation method which enables one to control the Ru loading through repetition of the process. The resulting microstructure is characterized by highly dispersed Ru particles (≈20−30 Å in diameter) attached to the carbon aerogel surface and distributed homogeneously throughout the material; the open pore structure of the carbon aerogels remains largely unaffected. Electrochemical characterization indicates that it is possible to increase the specific capacitance of the carbon aerogels in 1.0 M H 2 SO 4 from ≈100 F/g to greater than 250 F/g for samples with >50 wt % Ru due to the pseudocapacitive properties of hydrous RuO 2 . A volumetric capacitance greater than 140 F/cm 3 was observed for some samples. In addition, these materials show good cycling characteristics. Electrochemical impedance spectroscopy was unable to distinguish between double-layer capacitance and pseudocapacitance in these materials.
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Cited by
Metal oxide thin film based supercapacitors
Lokhande, C. D., Dubal, D. P., & Joo, O.-S. (2011) · Current Applied Physics · doi:10.1016/j.cap.2010.12.001 · Cited by 854
Electrochemical Double-Layer Capacitance of MoS[sub 2] Nanowall Films
Soon, J. M., & Loh, K. P. (2007) · Electrochemical and Solid-State Letters · doi:10.1149/1.2778851 · Cited by 477
Electrically conductive oxide aerogels: new materials in electrochemistry
Rolison, D. R., & Dunn, B. (2001) · Journal of Materials Chemistry · doi:10.1039/b007591o · Cited by 357
Self-citationLong, J. W., Swider, K. E., Merzbacher, C. I., & Rolison, D. R. (1999) · Langmuir · doi:10.1021/la980785a · Cited by 295
Carbon Aerogels and Monoliths: Control of Porosity and Nanoarchitecture via Sol–Gel routes
Antonietti, M., Fechler, N., & Fellinger, T.-P. (2014) · Chemistry of Materials · doi:10.1021/cm402239e · Cited by 227
Metadata
- Authors
- Miller, J. M., & Dunn, B.
- Venue
- Langmuir
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-01-13
- Volume
- 15
- Issue
- 3
- Pages
- 799-806
- ISSN
- 0743-7463 (ISSN-L)
- 1520-5827
- OpenAlex
- W2005095653
- Cited by
- 191
- References
- 0
- FWCI
- 3.56
- Type
- journal article
- Language
- en
- Open access
- closed
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