Premium
Fast and Selective Semihydrogenation of Alkynes by Palladium Nanoparticles Sandwiched in Metal–Organic Frameworks
Author(s) -
Choe Kwanghak,
Zheng Fengbin,
Wang Hui,
Yuan Yi,
Zhao Wenshi,
Xue Guangxin,
Qiu Xueying,
Ri Myonghak,
Shi Xinghua,
Wang Yinglong,
Li Guodong,
Tang Zhiyong
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201913453
Subject(s) - phenylacetylene , catalysis , selectivity , palladium , metal organic framework , styrene , nanoparticle , chemistry , combinatorial chemistry , materials science , photochemistry , nanotechnology , chemical engineering , organic chemistry , copolymer , adsorption , polymer , engineering
The semihydrogenation of alkynes into alkenes rather than alkanes is of great importance in the chemical industry. Unfortunately, state‐of‐the‐art heterogeneous catalysts hardly achieve high turnover frequencies (TOFs) simultaneously with almost full conversion, excellent selectivity, and good stability. Here, we used metal–organic frameworks (MOFs) containing Zr metal nodes (“UiO”) with tunable wettability and electron‐withdrawing ability as activity accelerators for the semihydrogenation of alkynes catalyzed by sandwiched palladium nanoparticles (Pd NPs). Impressively, the porous hydrophobic UiO support not only leads to an enrichment of phenylacetylene around the Pd NPs but also renders the Pd surfaces more electron‐deficient, which leads to a remarkable catalysis performance, including an exceptionally high TOF of 13835 h −1 , 100 % phenylacetylene conversion 93.1 % selectivity towards styrene, and no activity decay after successive catalytic cycles. The strategy of using molecularly tailored supports is universal for boosting the selective semihydrogenation of various terminal and internal alkynes.