This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, under Award no. ER46473.
Room-Temperature Carbide-Derived Carbon Synthesis by Electrochemical Etching of MAX Phases†
Article first published online: 1 APR 2014
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 126, Issue 19, pages 4977–4980, May 5, 2014
How to Cite
Lukatskaya, M. R., Halim, J., Dyatkin, B., Naguib, M., Buranova, Y. S., Barsoum, M. W. and Gogotsi, Y. (2014), Room-Temperature Carbide-Derived Carbon Synthesis by Electrochemical Etching of MAX Phases. Angew. Chem., 126: 4977–4980. doi: 10.1002/ange.201402513
- Issue published online: 2 MAY 2014
- Article first published online: 1 APR 2014
- Manuscript Received: 17 FEB 2014
- U.S. Department of Energy. Grant Number: ER46473
Porous carbons are widely used in energy storage and gas separation applications, but their synthesis always involves high temperatures. Herein we electrochemically selectively extract, at ambient temperature, the metal atoms from the ternary layered carbides, Ti3AlC2, Ti2AlC and Ti3SiC2 (MAX phases). The result is a predominantly amorphous carbide-derived carbon, with a narrow distribution of micropores. The latter is produced by placing the carbides in HF, HCl or NaCl solutions and applying anodic potentials. The pores that form when Ti3AlC2 is etched in dilute HF are around 0.5 nm in diameter. This approach forgoes energy-intensive thermal treatments and presents a novel method for developing carbons with finely tuned pores for a variety of applications, such as supercapacitor, battery electrodes or CO2 capture.