期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 140, 期 45, 页码 15309-15318出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b08550
关键词
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资金
- Inorganometallic Catalyst Design Center, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0012702]
- DOE Office of Science [DE-AC02-06CH11357]
- NSF through the MRSEC program
- NSF through the ERC program
- NSF-MRI award [CHE-1229400]
- NSF through the MRI program
- NSF through the NNIN program
Promoters are ubiquitous in industrial heterogeneous catalysts. The wider roles of promoters in accelerating catalysis and/or controlling selectivity are, however, not well understood. A model system has been developed where a heterobimetallic active site comprising an active metal (Rh) and a promoter ion (Ga) is preassembled and delivered onto a metal-organic framework (MOF) support, NU-1000. The Rh Ga sites in NU-1000 selectively catalyze the hydrogenation of acyclic alkynes to E-alkenes. The overall stereoselectivity is complementary to the well-known Lindlar's catalyst, which generates Z-alkenes. The role of the Ga in promoting this unusual selectivity is evidenced by the lack of semihydrogenation selectivity when Ga is absent and only Rh is present in the active site.
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