S. Sellem et al., SYNTHESIS AND CATALYTIC BIFUNCTIONAL PROPERTIES OF TUNGSTEN OXYNITRIDES, Journal of the Chemical Society, Chemical Communications, (3), 1995, pp. 359-360
Reaction of ammonia with various tungsten precursors leads, after pass
ivation, to tungsten oxynitrides whose bifunctionality is tested in n-
heptane isomerization (high selectivity); polyanionic precursors conta
ining phosphorus give oxynitrides with enhanced metallic properties.