The gas-phase hydrogenation of crotonaldehyde has been performed over unsup
ported Mo2N and over Mo2N supported on two carbonaceous materials, an activ
ated carbon (AC) and a high surface area graphite (G). These catalysts were
in situ prepared by the temperature-programmed reaction of MoO3 and carbon
-supported Mo precursors with NH3. It is found that selectivity to the unsa
turated alcohol is maximum for the Mo2N/G sample, where crotylalcohol selec
tivities exceed the 60% during all time in reaction. Higher selectivity sur
face sites are associated with the (200) planes of the gamma-Mo2N crystalli
tes.