丙烯
丙烷
脱氢
氮化硼
选择性
催化作用
放热反应
烯烃
化学
硼
从头算
氮化物
六方氮化硼
光化学
无机化学
材料科学
有机化学
纳米技术
石墨烯
图层(电子)
作者
Joseph T. Grant,Carlos A. Carrero,Florian Göeltl,Juan M. Venegas,Philipp A. Mueller,Samuel P. Burt,Sarah E. Specht,William P. McDermott,Alessandro Chieregato,Ive Hermans
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2016-12-23
卷期号:354 (6319): 1570-1573
被引量:527
标识
DOI:10.1126/science.aaf7885
摘要
The exothermic oxidative dehydrogenation of propane reaction to generate propene has the potential to be a game-changing technology in the chemical industry. However, even after decades of research, selectivity to propene remains too low to be commercially attractive because of overoxidation of propene to thermodynamically favored CO2 Here, we report that hexagonal boron nitride and boron nitride nanotubes exhibit unique and hitherto unanticipated catalytic properties, resulting in great selectivity to olefins. As an example, at 14% propane conversion, we obtain selectivity of 79% propene and 12% ethene, another desired alkene. Based on catalytic experiments, spectroscopic insights, and ab initio modeling, we put forward a mechanistic hypothesis in which oxygen-terminated armchair boron nitride edges are proposed to be the catalytic active sites.
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