期刊
CATALYSIS SCIENCE & TECHNOLOGY
卷 5, 期 8, 页码 3935-3944出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5cy00136f
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资金
- National Science Foundation of China [21133010, 21273079]
- Guangdong Provincial National Science Foundation [2014A030312007, S20120011275, 2014A030310447]
- Program for New Century Excellent Talents in University [NCET-12-0190]
- Fundamental Research Funds for the Central Universities of China [2014ZG0005]
Carbon nanotubes (CNTs) and nitrogen-doped CNTs (NCNTs) as metal-free catalysts exhibited an excellent activity in the selective oxidation of alpha-pinene with molecular oxygen as the terminal oxidant. Two distinct pathways, i.e. epoxidation and allylic oxidation, were active in this reaction. Enhancement of epoxidation was observed over CNTs, yielding the highest epoxidation/allylic oxidation products ratio. Excellent activity was achieved over NCNTs, giving 54.5% alpha-pinene conversion and 272.4 mmol g(-1) h(-1) mass-normalized activity, which compete with that of the state-of-the-art metal catalysts. Allylic oxidation was enhanced over NCNTs, using which equimolar amounts of epoxide and allylic products were produced. Thus, N-doping boosted the overall conversion and the yields of both epoxidation and allylic oxidation products, which was supported by the results of theoretical simulation.
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