Co₄N–WN_x composite for efficient piezocatalytic hydrogen evolution

Abstract

Dual-phase transition metal nitrides (TMNs) based Co4N-WNx system has been fabricated using nitridation of CoWO4. Interface between centrosymmetric Co4N and non-centrosymmetric WNx promotes charge carrier separation. This system also shows...

Photo-enhanced piezocatalytic hydrogen evolution using in situ silver piezodeposited scheelite-type BaMoO4 and BaWO4

“…PFM analysis also indicates that the piezocatalytic HER was carried out with BaWO 4 and BaMoO 4 , which can be attributed to their piezoelectric properties. 51 Fig. S3 † displays the Mott-Schottky plots of BaWO 4 and BaMoO 4 in 0.1 M NaSO 4 .…”

“…PFM analysis also indicates that the piezocatalytic HER was carried out with BaWO 4 and BaMoO 4 , which can be attributed to their piezoelectric properties. 51…”

Vacancy-Defective Cobalt Nitride Nanostructures for Sonocatalytic Hydrogen Production Using Various Water Resources

“…Meanwhile, the highest hydrogen evolution rate for the Co 4 N catalyst in the RhB aqueous solution can reach 47.07 μmol g –1 h –1 , which is better than that in pure water. This may be caused by the ultrasound-generated oxidation active species consumed by the dye, which makes the dye act like a sacrificial agent and improves the sonocatalytic hydrogen evolution activity. , With the consumption of RhB, the hydrogen evolution rate decreases and gradually approaches that of pure water (Figure S8). In brief, cobalt nitride has excellent potential as a sonochemical catalyst for applications in acidic or alkaline solutions, natural seawater, and industrial wastewater.…”

Recent progress in the synthesis of transition metal nitride catalysts and their applications in electrocatalysis

“…Different temperatures during nitriding will give the catalyst different catalytic activity and stability. Yu et al placed the precursor CoWO 4 nanoparticles at different temperatures (550 °C, 650 °C and 750 °C); 20 the ammonia flow rate was 100 sccm (standard cubic centimeter per minute), the heating rate was 5 °C min −1 , and the Co 4 N-WN x (CWN- x ) nanoparticle samples were prepared at different temperatures after holding for two hours ( x is different temperature). The prepared CWN-750 sample had the smallest particle size (Fig.…”