Highly Active and Stable Pt-Loaded Ce0.75Zr0.25O2 Yolk–Shell Catalyst for Water–Gas Shift Reaction

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• 作者：Jae-Oh Shim ; Young Jun Hong ; Hyun-Suk Na ; Won-Jun Jang ; Yun Chan Kang ; Hyun-Seog Roh
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：July 13, 2016
• 年：2016
• 卷：8
• 期：27
• 页码：17239-17244
• 全文大小：397K
• 年卷期：0
• ISSN：1944-8252

文摘

Multishelled, Pt-loaded Ce_0.75Zr_0.25O₂ 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/Ce_0.75Zr_0.25O₂ yolk–shell nanostructures for the WGS. Of the prepared catalysts, a 2% Pt loading of the Ce_0.75Zr_0.25O₂ yolk–shell microspheres showed the highest CO conversion. The high catalytic activity of the 2% Pt/Ce_0.75Zr_0.2O₂ catalyst was mainly due to its easier reducibility and the maintenance of active catalytic Pt species. The Pt-loaded Ce_0.75Zr_0.25O₂ 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.