닫기

연구

Research Outcome

미래를 창조하는 포스텍 화학공학과

Exsolved metal-boosted active perovskite oxide catalyst for stable water gas shift reaction

Title of paper
Exsolved metal-boosted active perovskite oxide catalyst for stable water gas shift reaction
Author
[한정우 교수 연구실] 엑솔루션 현상을 활용한 고성능 WGS 촉매개발
Publication in journal
Journal of Catalysis 400 (2021) 148-159.
Publication date
202108

[Abstract]

We designed a Ni-exsolved perovskite catalyst for the high-temperature water–gas shift reaction. The perovskite particle has the formula of La0.9Fe0.95Ni0.05O3 and has metal nanoparticles (NPs) exsolved on its surface after reduction treatment. XRD, SEM, HR-TEM and XPS analyses were used to confirm the existence of the exsolved Ni metal NPs. This catalyst provided higher CO conversion and H2 yield, and exceptionally better catalytic stability than the commercial catalyst. Temperature-programmed desorption and reduction measurements revealed the active sites for the enhanced activity. Density functional theory calculations and DRIFT results elucidated the reaction mechanism on this catalyst. We believe that our results can increase the possibility of achieving an effective and economical catalyst for a wide range of heterogeneous catalytic reactions.
 

DOI: doi.org/10.1016/j.jcat.2021.05.029
Link: https://www.sciencedirect.com/science/article/pii/S0021951721002219