Selective oxidative dehydrogenation of propane to propene using boron nitride catalysts

Selective oxidative dehydrogenation of propane to propene using boron nitride catalysts 
 

J. T. Grant,1 C. A. Carrero,1 F. Goeltl,1 J. Venegas,2 P. Mueller,1 S. P. Burt,2 S. E. Specht,1 W. P. McDermott,1 A. Chieregato,1 I. Hermans1,2*
1University of Wisconsin—Madison, Department of Chemistry, 1101 University Avenue, Madison, WI 53706, USA. 2University of Wisconsin—Madison, Department of Chemical and Biological Engineering, 1415 Engineering Drive, Madison, WI 53706, USA.
*Corresponding author. E-mail: hermans@chem.wisc.edu

 

http://science.sciencemag.org/content/early/2016/11/30/science.aaf7885.full

Abstract

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 (h-BN) and boron nitride nanotubes (BNNTs) 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 BN edges are proposed to be the catalytic active sites.