期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 115, 期 32, 页码 15772-15777出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp2021825
关键词
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资金
- Ministry of Education, Science and Technology [2010-07592, 2009-0070926, 2010-0002834]
- Korean government (MEST) [S2-2009-000-00951-1]
- Ministry of Education, Science & Technology (MoST), Republic of Korea [N01110018] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Ministry of Public Safety & Security (MPSS), Republic of Korea [C1090-1100-0002] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Council of Science & Technology (NST), Republic of Korea [KIER-B12410] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2010-0007592, 2010-0002834, 2009-0070926] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In the present study, we optimize the yolk-shell nanostructure in a palladium-silica system for the purpose of attaining high activity in Suzuki cross-coupling reactions. Pd@porous SiO2 (Pd@pSiO(2)) yolk-shell nanoparticles, bearing tiny palladium cores and highly porous silica hollow shells, were synthesized by direct silica coating and partial etching of the silica layers. High temperature treatment removed all surfactants around the catalyst surface and generated large pores on the silica shells. The resulting Pd@pSiO(2) yolk-shell catalysts exhibited extremely high initial turnover frequency of 78000 h(-1), as well as excellent reusability of more than 10 times in a standard Suzuki coupling reaction. The catalysts also catalyzed Suzuki reactions with various substrates including bromo- and chlorobenzene very well.
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