In this work the catalytic activity of gold catalysts supported on various forms of carbon is described and compared in the ring transformations of propylene oxide (methyloxirane). The catalysts were Au/multiwall carbon nanotube (Au/MWNT) Au/activated carbon and Au/graphite. The reactions were studied in a pulse microreactor in the 363 - 473 K temperature range. Methyloxirane underwent deoxygenation and isomerisation over the Au/MWNT and Au/activated carbon catalysts but deoxygenation only occurred over Au/graphite. At 363 K the Au/MWNT was only active, and it proved to be the most active catalyst at each temperature. This finding was attributed to an optimum mix of defect sites at the metal-support interface and electric conductivity of the support - both believed to be crucial in the high catalytic activity observed.
- Au/activated carbon
- Au/multiwall carbon nanotube
- Transformation pathways
ASJC Scopus subject areas
- Physical and Theoretical Chemistry