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Highly Active and Stable Pt-Loaded Ce0.75Zr0.25O2 Yolk-Shell Catalyst for Water-Gas Shift Reaction
- Issue Date
- 13-7월-2016
- Publisher
- AMER CHEMICAL SOC
- Keywords
- yolk-shell; spray pyrolysis; water-gas shift; Pt loading; reducibility; sintering resistance
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.8, no.27, pp.17239 - 17244
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS & INTERFACES
- Volume
- 8
- Number
- 27
- Start Page
- 17239
- End Page
- 17244
- ISSN
- 1944-8244
- Abstract
- 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/Ce0.75Zr0.25O2 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.
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