A Comparison of the Reactivity of the Lattice Nitrogen in Tungsten Substituted Co Mo N and Ni Mo N.

The effect of the partial substitution of Mo with W in Co Mo N and Ni Mo N on ammonia synthesis activity and lattice nitrogen reactivity has been investigated. This is of interest as the coordination environment of lattice N is changed by this process. When tungsten was introduced into the metal nitrides by substitution of Mo atoms, the catalytic performance was observed to have decreased.

Synthesis and methane cracking activity of a silicon nitride supported vanadium nitride nanoparticle composite.

The co-ammonolysis of V(NMe) and Si(NHMe) with ammonia in THF and in the presence of ammonium triflate ([NH][CFSO]) leads to the formation of monolithic gels. Pyrolysing these gels produces mesoporous composite materials containing nanocrystalline VN and amorphous silicon imidonitride. Elemental mapping indicated a thorough distribution of VN with no evidence of large cluster segregation.