논문 해외 국제전문학술지(SCI급) Anchoring Catalytically Active Species on Alumina via Surface Hydroxyl Group for Durable Surface Reaction
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2023-05
- 저자명 Choi, Y., Kim, G., Kim, J., Lee, S., Kim, J.-C., Ryoo, R., and Lee, H.*
- 학술지명 Applied Catalysis B: Environmental
- 발행처명 Elsevier
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 7
- 원문 링크 https://www.sciencedirect.com/science/article/abs/pii/S0926337322012668
홈페이지논문 초록 (Abstract)
Ensuring durable catalyst structure is crucial for heterogeneous surface reactions. Particularly, exhaust gas treatment catalyst needs exceptional durability at very high temperature (≥ 800 ºC) and low-temperature activity. Here, a hierarchical catalyst structure consisting of alumina, ceria, and Pt was synthesized to achieve high activity and durability. The alumina surface was modified to have surface hydroxyl groups by hydrothermal pre-treatment at various temperatures, then this alumina was used to anchor catalytically active species to form a highly durable surface structure. Whereas Pt and ceria on bare alumina suffered from significant sintering after aging at 800 ºC, the same species formed on the pre-treated alumina hardly presented change in surface structure after aging. This durable Pt/CeO2/Al2O3 catalyst showed no degradation for the simultaneous oxidation of CO, C3H6, and C3H8 with water vapor for repeated reactions or long-term reactions. This work can provide a useful guideline in designing a durable heterogeneous catalyst.