期刊
ACS CATALYSIS
卷 5, 期 2, 页码 797-802出版社
AMER CHEMICAL SOC
DOI: 10.1021/cs501896c
关键词
gold nanoparticles; free of protecting agent; low-temperature oxidation; size dependent; mesoporous carbon
资金
- State Key Basic Research Program of China [2013CB934102]
- NSF of China [21322308, 21173149]
- Ministry of Education of China [PCSIRT-IRT1269, 20123127110004]
- Shanghai Science and Technology and Education Committee [11JC1409200, DZL123, S30406]
Gold nanoparticles approximately 3 nm in diameter free of protecting agent were loaded onto less-interacting, self-assembling mesoporous carbon using a two-step carbonization method. The catalyst exhibits TOF value of 478 and 31.2 h(-1) at 25 and 0 degrees C, comparable to, and much higher than an 8.9 nm gold-supported nanocatalyst, respectively, for the water-mediated selective oxidation of benzyl alcohol. These results highlight the improvement in the sorption of dioxygen species on surface atoms of gold nanoparticles at low temperatures due to electronic modification by the reduction of the particle size.
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