Ferrous Centers Confined on Core鈥揝hell Nanostructures for Low-Temperature CO Oxidation
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- 作者：Xiaoguang Guo ; Qiang Fu ; Yanxiao Ning ; Mingming Wei ; Mingrun Li ; Shuo Zhang ; Zheng Jiang ; Xinhe Bao
- 刊名：The Journal of the American Chemical Society
- 出版年：2012
- 出版时间：August 1, 2012
- 年：2012
- 卷：134
- 期：30
- 页码：12350-12353
- 全文大小：263K
- 年卷期：v.134,no.30(August 1, 2012)
- ISSN：1520-5126
文摘
A noble metal (NM) can stabilize monolayer-dispersed surface oxide phases with metastable nature. The formed 鈥渙xide-on-metal鈥?inverse catalyst presents better catalytic performance than the NM because of the introduction of coordinatively unsaturated cations at the oxide鈥搈etal boundaries. Here we demonstrate that an ultrathin NM layer grown on a non-NM core can impose the same constraint on the supported oxide as the bulk NM. Cu@Pt core鈥搒hell nanoparticles (NPs) decorated with FeO patches use much less Pt but exhibit performance similar to that of Pt NPs covered with surface FeO patches in the catalytic oxidation of CO. The 鈥渙xide-on-core@shell鈥?inverse catalyst system may open a new avenue for the design of advanced nanocatalysts with decreased usage of noble metals.