3D Ridge-Valley Structure of a Pt-Ceria Catalyst: HRTEM and EELS Spectrum Imaging
3D Ridge-Valley Structure of a Pt-Ceria Catalyst: HRTEM and EELS Spectrum Imaging
复制标题
DOI：
10.1007/s10562-009-0140-7
复制
发表时间：
2009-10-01
影响因子：
2.8
通讯作者：
Davis, Burtron H.
中科院分区：
文献类型：
--
作者：
Graham, Uschi M.;Khatri, Rajesh A.;Davis, Burtron H.
纳米脊和谷结构的形成作为一个结果的自对准的个别氧化铈纳米晶体，HRSTEM/EELS揭示了三维形貌轮廓的脊和谷结构的氧化铈载体。在制备Pt/二氧化铈催化剂后，HRSTEM表明Pt纳米颗粒在二氧化铈载体的纳米谷内优先排列。EELS分析证实了存在于山谷不同深度的Pt纳米颗粒附近的二氧化铈氧化态的变化。
Nano-ridge and valley structures formed as a result of self-aligned individual ceria nano-crystals, and HRSTEM/EELS revealed the 3-dimensional morphology profiles of the ridge and valley structures of the ceria support. After preparation of a Pt/ceria catalyst, HRSTEM indicated the preferential alignment of Pt nanoparticles inside the nano-valleys of the ceria support. EELS analyses confirmed changes in the oxidation state of ceria in the vicinity of Pt nanoparticles that are present at different depth in the valleys.