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1093711325金虫 (小有名气)
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Tuning the shape of ceria nanomaterials for catalytic applications
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consist of low‐coordinated atoms that are located at the defect sites such as terraces, edges, kinks, or vacancies.A typical ex‐ ample is the unique behavior of gold nanoparticles as demon‐ strated by the pioneering work of Haruta [5–9]. Gold has long been viewed as catalytically inert; however, it becomes highly active for low‐temperature CO oxidation when the size of the Au particles ranges 2–5 nm [5,6]. This so‐called size effect has been interpreted in terms of the variation in geometric and/or electronic properties of gold nanoparticles that strongly affect the adsorption and activation of CO and molecular oxygen 有关纳米氧化铈催化剂的‘ |
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2楼2015-03-29 13:06:49