Single-Step Synthesis of W₂C Nanoparticle-Dispersed Carbon Electrocatalysts for Hydrogen Evolution Reactions Utilizing Phosphate Groups on Carbon Edge Sites.

ABSTRACT: A novel, one-step protocol for the selective synthesis of W₂C nanoparticles from phosphotungstic acid (H₃PW₁₂O₄₀), a low-cost and commercially available tungsten compound, was developed. The nanoparticles had diameters of 1-50 nm and were dispersed on a carbon substrate. The W₂C nanoparticles were prepared by a simple operation sequence, involving impregnation of carbon black with H₃PW₁₂O₄₀ followed by calcination at 1000 °C. X-ray diffraction study revealed the selective formation of the W₂C phase in the samples prepared, whereas the tungsten carbide (WC) phase was present in the control prepared from H₂WO₄. Stable W₂C nanoparticles were obtained using this m

SUBMITTER: Ishii T 

PROVIDER: S-EPMC6640763 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature