Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 36, Pages 12655-12660Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201906138
Keywords
2D materials; functionalization; MXenes; oxidation
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Funding
- National Science Foundation [DMR-1740795]
- National Science Foundation Major Research Instrumentation award [DMR-1429661]
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MXenes have shown promise in myriad applications, such as energy storage, catalysis, EMI shielding, among many others. However, MXene oxidation in aqueous colloidal suspensions when stored in water at ambient conditions remains a challenge. It is now shown that by simply capping the edges of individual MXene flakes, Ti3C2Tz and V2CTz, by polyanions such as polyphosphates, polysilicates or polyborates, it is possible to quite significantly reduce their propensity for oxidation even when held in aerated water for weeks. This breakthrough resulted from the realization that the edges of MXene sheets are positively charged. It is thus an example of selectively functionalizing the edges differently from the MXene sheet surfaces.
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