期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 31, 页码 10626-10630出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201904996
关键词
boron nitride; dehydrogenation; nanosheets; heterogeneous catalysis; magnesium
资金
- Department of Energy, Office of Science, Office of Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division
- National Natural Science Foundation of China [21436007, 21706228]
- Zhejiang Provincial Natural Science Foundation of China [LR17B060002]
- Center for Nanophase Materials Sciences
- UT-Battelle, LLC [DE-AC05-00OR22725]
Hexagonal boron nitride (h-BN) is regarded as a graphene analogue and exhibits important characteristics and vast application potentials. However, discovering a facile method for the preparation of nanoporous crystalline h-BN nanosheets (h-BNNS) is still a challenge. Herein, a novel and simple route for the conversion of amorphous h-BN precursors into highly crystalline h-BNNS was achieved through a successive dissolution-precipitation/crystallization process in the presence of magnesium. The h-BNNS has high crystallinity, high porosity with a surface area of 347 m(2) g(-1), high purity, and enhanced thermal stability. Improved catalytic performance of crystalline h-BNNS was evidenced by its much higher catalytic efficiency in the dehydrogenation of dodecahydro-N-ethylcarbazole, compared with its amorphous h-BN precursor, as well as other precious-metal-loaded heterogeneous catalysts.
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