논문 해외 국제전문학술지(SCI급) Low-temperature phase synthesis of V1-xTixO2 oxide systems using Pt impregnation
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2020-04
- 저자명 최원석,Woo, SH (Woo, Sung Hun),Choi, H (Choi, Hyeokjoo),Kim, MK (Kim, Mi Kyung),강현일,Azad, A (Azad, Abul K.),Baek, SW (Baek, Seung-Wook),Shin, TH (Shin, Tae Ho),Kim, K (Kim, Keunsoo),김정현
- 학술지명 APPLIED SURFACE SCIENCE
- 발행처명 ELSEVIER
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 10
홈페이지논문 초록 (Abstract)
In this study, V1-xTixO2 oxide systems were synthesized with solid state reaction by using V2O5 and TiO2 at a temperature range of 600-1300 degrees C for the direct application of hydrogen storage materials for fuel cells.At a temperature of 1300 degrees C, two compositions, V0.1Ti0.9O2 (VT19) and V0.3Ti0.7O2 (VT37), were only synthesized as rutile TiO2 phase in V1-xTixO2 (x = 0.1, 0.3, 0.5, 0.7, and 0.9) oxide systems. When Pt was impregnated on V1-xTixO2 oxide systems and heat-treated at 600 degrees C, VT19, VT37, and V0.5Ti0.5O2 (VT55) were synthesized into a single phase showing TiO2 rutile phase under reducing condition. Therefore, the incorporation of Pt into the V1-xTixO2 oxide powder by applying the impregnation method could effectively lower the synthesis condition of 1300-600 degrees C. From the XPS analysis, the concentration of V3+ was found to be highest in the reducing condition and the concentration of V4+ was the highest in the oxidation condition. VT19 impregnated with Pt exhibited typical n-type electrical conductivity behavior and stable microstructure characteristics in redox processes.