Photoinduced conversion of methane into benzene over GaN nanowires.
As a class of key building blocks in the chemical industry, aromatic compounds are mainly derived from the catalytic reforming of petroleum-based long chain hydrocarbons. The dehydroaromatization of methane can also be achieved by using zeolitic catalysts under relatively high temperature. Herein we demonstrate that Si-doped GaN nanowires (NWs) with a 97% rationally constructed m-plane can directly convert methane into benzene and molecular hydrogen under ultraviolet (UV) illumination at rt. Mechanistic studies suggest that the exposed m-plane of GaN exhibited particularly high activity toward methane C-H bond activation and the quantum efficiency increased linearly as a function of light intensity. The incorporation of a Si-donor or Mg-acceptor dopants into GaN also has a large influence on the photocatalytic performance.
Department of Chemistry, McGill University , 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada.
Lu
L
Li
Shizhao
S
Fan
Xiaoyue
X
Mu
Zetian
Z
Mi
Chao-Jun
CJ
Li