期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 22, 页码 6454-6458出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201800557
关键词
bimetallic; encapsulation; heterogeneous catalysis; nanoclusters; zeolites
资金
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0016214]
- Japan Society for the Promotion of Science
- JSPS KAKENHI Grant [15J07161]
- Program for Leading Graduate Schools, Global Leader Program for Social Design and Management (GSDM)
- Ministry of Education, Culture, Sports, Science and Technology
- Sao Paulo Research Foundation [FAPESP 2015/23900-2]
- National Council of Technological and Scientific Development [CNPq 309373/2014-0]
- Grants-in-Aid for Scientific Research [15J07161] Funding Source: KAKEN
Bimetallic nanoparticle encapsulation in microporous zeolite crystals is a promising route for producing catalysts with unprecedented reaction selectivities. Herein, a novel synthetic approach was developed to produce PtZnx nanoclusters encapsulated inside zeolite micropores by introducing Pt2+ cations into a zincosilicate framework via ion exchange, and subsequent controlled demetallation and alloying with framework Zn. The resulting zeolites featured nanoclusters with sizes of approximately 1 nm, having an interatomic structure corresponding to a PtZnx alloy as confirmed by pair distribution function (PDF) analysis. These materials featured simultaneous shape and substrate specificity demonstrated by the selective production of p-chloroaniline from the competitive hydrogenation of p-chloronitrobenzene and 1,3-dimethyl-5-nitrobenzene.
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