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CO氧化反应中的二氧化铈晶面效应(英文)

发布时间:2021-12-12 00:10
  二氧化铈(CeO2)因其具有较强的储放氧能力,被用作氧化还原反应的催化材料.自2005年,研究者制备出形貌可控的CeO2纳米棒、纳米立方块和纳米多面体,在CeO2形貌控制及构效关系研究方面取得长足发展.各种结构表征手段包括原位拉曼(in situ Raman)、原位傅里叶变换红外光谱(in situ DRIFTS)、核磁共振(NMR)和电镜等被用来研究不同形貌CeO2的表面结构和在催化反应中的活性差异.一般的活性规律为CeO2纳米棒({110}/{100})>纳米立方块({100})>纳米多面体({111}/{100}).近年来,负载型CeO2催化剂因其能稳定分散金属,通过金属-载体相互作用调控界面电子结构并表现出优异的催化活性而引起广泛关注,其中晶面效应在负载型CeO2催化体系中显得较为复杂.铜铈催化剂被认为是非常经济有效的CO氧化催化剂,然而由于制备和测试条件差异导致的CeO2晶面对铜铈催化剂催化... 

【文章来源】:Chinese Journal of Catalysis. 2020,41(06)北大核心EISCICSCD

【文章页数】:14 页

【文章目录】:
1. Introduction
2. Experimental
    2.1. Synthesis of catalysts
        2.1.1. Preparation of CeO2 NC
        2.1.2. Preparation of CeO2 NR
        2.1.3. Preparation of Cu–CeO2 catalysts
    2.2. Characterization of as-prepared catalysts
    2.3. Catalytic performance tests
3. Results and discussions
    3.1. Morphological characterization of as-prepared catalysts
    3.2. Catalytic performance of as-prepared samples
    3.3. Textural properties of as-prepared catalysts
    3.4. XPS surface analysis
    3.5. Reducibility of as-prepared catalysts
    3.6. CO-TPD analysis of CO adsorption properties of as-prepared catalysts
    3.7. In situ DRIFTS analysis of as-prepared catalysts
    3.8. Discussion
4. Conclusions
Graphical Abstract
Insights into facet-dependent reactivity of CuO–CeO2 nanocubes and nanorods as catalysts for CO oxidation reaction



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