期刊
NANO LETTERS
卷 10, 期 7, 页码 2709-2713出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl101700j
关键词
Ruthenium; nanoparticles; model nanocatalyst; CO oxidation; size effect
类别
资金
- Office of Science, Office of Basic Energy Sciences of the U S Department of Energy [DE-AC02-05CH11231]
- Ministry of Education, Science, and Technology [31-2008-000-10055-0]
- Ministry of Education, Science & Technology (MoST), Republic of Korea [N01100037] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Carbon monoxide oxidation over ruthenium catalysts has shown an unusual catalytic behavior Here we report a particle size effect on CO oxidation over Ru nanoparticle (NP) catalysts Uniform Ru NPs with a tunable particle size from 2 to 6 nm were synthesized by a polyol reduction of Ru(acac)(3) precursor in the presence of poly(vinylpyrrolidone) stabilizer The measurement of catalytic activity of CO oxidation over two-dimensional Ru NPs arrays under oxidizing reaction conditions (40 Torr CO and 100 Torr O-2) showed an activity dependence on the Ru NP size The CO oxidation activity increases with NP size, and the 6 nm Ru NP catalyst shows 8-fold higher activity than the 2 nm catalysts The results gained from this study will provide the scientific basis for future design of Ru-based oxidation catalysts
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