121st General Meeting of the KCS

Type Poster Presentation
Area Physical Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code PHYS.P-183
Subject Hierarchical nanostructures of V2O5 nanorods on WO3 Nanotubes toward a High-Performance Electrocatalyst
Authors Yukyung SHIN, Hyerim Oh, SOYEON KIM, Myung Hwa Kim*
Chemistry and Nano Science, Ewha Womans University, Korea
Abstract Electrospinning is one of the most facile methods to fabricate nanofibers from a mixed metal solution of precursors. We successfully synthesized Vanadium Pentoxide (V2O5) nanorods on Tungsten trioxide (WO3) nanotubes by combination of electrospinning process and thermal annealing using precursors of V2O5 and WO3. The hierarchically driven nanostructures of V2O5 nanorods and WO3 nanotubes were characterized by scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) spectrum, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and high resolution transmission electron microscopy (HRTEM). Results indicate that the length of V2O5 nanorods is approximately 150-180nm with diameter of about 5-10nm while WO3 nanotubes have uniform outer diameters around 280nm with full of small protuberances. Generally, tungsten oxide has been widely studied for diverse applications because of photocatalytic, intrinsic catalytic, and eletrocatalytic properties. And as a transition metal, Vanadium is known for high electrochemical performance and also has the possibility to catalyze the water splitting. Thus, we further investigated the electrocatalytic activities for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) through synthesized V2O5-WO3 composite nanostructure depending on different atomic ratio of Vanadium and Tungsten and the calcination temperature toward future high performance electrocatalysts.
E-mail yukshinee@gmail.com