WANG Xiaojuan, MAO Xinbiao, LI Guohua, et al. Crystal phase formation mechanism and electrocatalytical properties of WC/TiO2 nanocomposites[J]. CIESC Journal, 2016, (11): 4873-4877. DOI: 10.11949/j.issn.0438-1157.20160531.
WANG Xiaojuan, MAO Xinbiao, LI Guohua, et al. Crystal phase formation mechanism and electrocatalytical properties of WC/TiO2 nanocomposites[J]. CIESC Journal, 2016, (11): 4873-4877. DOI: 10.11949/j.issn.0438-1157.20160531.DOI:
Tungsten carbide and titania (WC/TiO2) nanocomposites were fabricated by surface modification of rutile titania reacting with ammonium metatungstate and followed by in situ reduction and carburization of the modified rutile in CH4/H2 atmosphere. The influence of temperature and time of in situ reduction and carburization on phase structures of WC/TiO2 nanocomposites were investigated by XRD characterization on nanocomposites
and the formation mechanism of crystal phases in WC/TiO2 nanocomposites was discussed. The morphology and thermal stability of WC/TiO2 nanocomposites were studied by SEM and TG-DTA
respectively. Electrocatalytical properties of the WC/TiO2 nanocomposites with different phase structures were investigated by cyclic voltammetry. Results showed that WC/TiO2 nanocomposites composed of both WC and TiO2 crystal phase exhibited the best catalytic activity for p-nitrophenol (PNP) electroreduction.