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Promoted effect of alkalization on the catalytic performance of Rh/alk-Ti3C2X2 (X[dbnd]O, F) for the hydrodechlorination of chlorophenols in base-free aqueous medium.
- Source :
-
Applied Catalysis B: Environmental . Aug2017, Vol. 210, p462-469. 8p. - Publication Year :
- 2017
-
Abstract
- Exploring MXenes as supports for synthesis of highly efficient catalysts are extremely important for hydrodechlorination of chlorophenols because of the acute toxicity and strong potential bioaccumulation of chlorophenols. We reported a facile strategy to synthesize Rh nanoparticles deposited on 2D alk-Ti 3 C 2 X 2 (X = O, F) (alk-Ti 3 C 2 X 2 for short) MXene, which was prepared through the removal of the Al layers of Ti 3 AlC 2 and post-treatment by alkalization. Modifying the Ti 3 C 2 X 2 support by alkalization triggered the substitution of surface fluorine groups with surface oxygen species. The changes in the surface chemistry of alk-Ti 3 C 2 X 2 effectively prevented particle aggregation to form well-dispersed Rh nanoparticles in small sizes with relative high metal dispersion, thereafter improving the hydrogen uptake capacity of the catalyst. Consequently, the Rh/alk-Ti 3 C 2 X 2 catalyst significantly enhanced the catalytic performance for the HDC reaction, which could be assigned to the large number of active components from small Rh nanoparticles. This strategy provides a basis for investigating the use of MXenes as supports to synthesize well-defined metal nanoparticles in 2D layered structures for potential applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09263373
- Volume :
- 210
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis B: Environmental
- Publication Type :
- Academic Journal
- Accession number :
- 122699039
- Full Text :
- https://doi.org/10.1016/j.apcatb.2017.04.017