Solid-state chemistry route for supported tungsten and tungsten carbide nanoparticles

Synergistic effect of Mo2N and Pt for promoted selective hydrogenation of cinnamaldehyde over Pt–Mo2N/SBA-15

“…Generally, the obtained metal nitrides have wide size distributions in the range of micrometers, [40][41][42][43] which is a disadvantage to the possibility of Pt being in contact with Mo 2 N. So, the key is to explore an effective method to obtain supported Mo 2 N with a small size. Fortunately, in our previous work, small-sized and well-dispersed WN NPs of 2-3 nm on GO-derived graphene were synthesized successfully by using heteropolyacid H 4 SiW 12 O 40 clusters as a W source.…”

Small-sized and high-dispersed WN from [SiO4(W3O9)4]4− clusters loading on GO-derived graphene as promising carriers for methanol electro-oxidation

“…However, the practical preparation of nitrides with these characteristics remains a large challenge to date. The traditional syntheses for nitrides, including the temperature-programmed reaction route and direct impregnation method, [14][15][16][17][18] either suffer incomplete ammonication (leaving behind un-reacted metals) or crystal growth (large size of the particles), which are not favorable for developing the cocatalytic action of nitrides. To decrease the size of nitrides and stabilize the particles from aggregation in reaction and application, it is necessary to load the nitrides (carbide) on certain supports, such as silica and carbon.…”

Tungsten Carbide Nanoparticles as Efficient Cocatalysts for Photocatalytic Overall Water Splitting

“…Some methods in the literature can be used to obtain nanosized carbide materials, such as high-temperature treatment of microporous carbon materials with metal precursors [23] and chemical vapor deposition techniques to prepare carbon-encapsulated metal nanoparticles. [24] A novel synthetic route utilizes organic compounds, such as urea, [20] as carbon sources and also utilizes transition-metal precursors. In particular, Antonietti's group developed a simple method to control Mo and W carbide and nitride phases, depending on the molar ratio of the metal precursor to urea.…”