Unsupported Mo2N catalysts were prepared by thermal decomposition of ammonium heptamolybdate to form MoO3 followed by nitridation in either flowing ammonia or a N2/H2 mixture. The nitridation was achieved at two different space velocities for each reaction mixture. This resulted in Mo2N catalysts with different surface areas as well as different phases present as were determined by X-ray diffraction (XRD). The activity and selectivity of the catalysts were evaluated for hydrodeox...