期刊
ACS CATALYSIS
卷 6, 期 2, 页码 666-670出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.5b02518
关键词
core-shell; silver; palladium; semihydrogenation; alkyne
资金
- JSPS KAKENHI [26289303, 26630410, 26105003, 24246129]
- Program for Creating Future Wisdom, Osaka University
- Nano technology Platform Program of the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan
- Grants-in-Aid for Scientific Research [15K17462, 15K21719, 26105009, 26289303, 26105001, 26105003, 26630410] Funding Source: KAKEN
We designed core-Pd/shell-Ag nanocomposite catalyst (Pd@Ag) for highly selective semihydrogenation of alkynes. The construction of the core-shell nanocomposite enables a significant improvement in the low activity of Ag NPs for the selective semihydrogenation of alkynes because hydrogen is supplied from the core-Pd NPs to the shell-Ag NPs in a synergistic manner. Simultaneously, coating the core-Pd NPs with shell-Ag NPs results in efficient suppression of overhydrogenation of alkenes by the Pd NPs. This complementary action of core-Pd and shell-Ag provides high chemoselectivity toward a wide range of alkenes with high Z-selectivity under mild reaction conditions (room temperature and 1 atm H-2). Moreover, Pd@Ag can be easily separated from the reaction mixture and is reusable without loss of catalytic activity or selectivity.
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