Highly Active and Stable Pt-Loaded Ce0.75Zr0.25O2 Yolk-Shell Catalyst for Water-Gas Shift Reaction.
Multishelled, Pt-loaded Ce0.75Zr0.25O2 yolk-shell microspheres were prepared by a simple spray pyrolysis process for use in the water-gas shift (WGS) reaction. The Pt-loading was optimized, obtaining highly active Pt/Ce0.75Zr0.25O2 yolk-shell nanostructures for the WGS. Of the prepared catalysts, a 2% Pt loading of the Ce0.75Zr0.25O2 yolk-shell microspheres showed the highest CO conversion. The high catalytic activity of the 2% Pt/Ce0.75Zr0.2O2 catalyst was mainly due to its easier reducibility and the maintenance of active catalytic Pt species. The Pt-loaded Ce0.75Zr0.25O2 catalyst microspheres were highly resistant to Pt sintering because of their unique yolk-shell structure. Spray pyrolysis was found to be highly efficient for the production of precious-metal-loaded, multicomponent metal oxide yolk-shell microspheres for catalytic applications.
Department of Environmental Engineering, Yonsei University , 1 Yonseidae-gil, Wonju, Gangwon 220-710, Republic of Korea.
Jae-Oh
JO
Shim
Department of Materials Science and Engineering, Korea University , Anam-Dong, Seongbuk-Gu, Seoul 136-713, Republic of Korea.
Young Jun
YJ
Hong
Department of Environmental Engineering, Yonsei University , 1 Yonseidae-gil, Wonju, Gangwon 220-710, Republic of Korea.
Hyun-Suk
HS
Na
Department of Environmental Engineering, Yonsei University , 1 Yonseidae-gil, Wonju, Gangwon 220-710, Republic of Korea.
Won-Jun
WJ
Jang
Department of Materials Science and Engineering, Korea University , Anam-Dong, Seongbuk-Gu, Seoul 136-713, Republic of Korea.
Yun Chan
YC
Kang
Department of Environmental Engineering, Yonsei University , 1 Yonseidae-gil, Wonju, Gangwon 220-710, Republic of Korea.
Hyun-Seog
HS
Roh
Pt loading; reducibility; sintering resistance; spray pyrolysis; water−gas shift; yolk−shell