Structure Sensitivity in Adsorption and Decomposition of NO on Ir
Structure Sensitivity in Adsorption and Decomposition of NO on Ir
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NO 在 Ir 上吸附和分解的结构敏感性
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
T. Jacob
中科院分区：
文献类型：
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作者：
Wenhua Chen;T. Madey;A. L. Stottlemyer;Jingguang G. Chen;P. Kaghazchi;T. Jacob
通过程序升温脱附（TPD）、高分辨电子能量损失谱（HREELS）和密度泛函理论（DFT）研究了NO在平面Ir（210）和具有可调小面尺寸（5−14 nm）的纳米小面Ir（210）上的吸附和分解。在平面Ir（210）上的吸附位点和NO的热分解的结构敏感性的证据已经被发现，而在面状Ir（210）上。Ir（210）平面和多面表面对NO的分解都具有很高的活性，对N2具有很高的选择性。加热NO饱和的平面Ir（210）导致大量N2和少量NO以及痕量N2 O的解吸。退火NO饱和的面状Ir（210）也产生大量的N2和少量的NO，而不形成N2 O。在300 K时，NO在两个表面上的吸附主要是分子吸附。在平面Ir（210）上，NO在整个NO覆盖范围内都吸附在顶位上.在含有（110）面和{311}面的Ir（210）面上，NO吸附在...
The adsorption and decomposition of NO on planar Ir(210) and nanofaceted Ir(210) with tunable facet sizes (5−14 nm) have been studied by means of temperature programmed desorption (TPD), high-resolution electron energy loss spectroscopy (HREELS), and density functional theory (DFT). Evidence has been found for structure sensitivity in adsorption sites and thermal decomposition of NO on planar Ir(210) versus those on faceted Ir(210). Both planar and faceted Ir(210) surfaces are very active for NO decomposition with high selectivity to N2. Heating NO-saturated planar Ir(210) leads to desorption of large amounts of N2 and small amounts of NO together with traces of N2O. Annealing NO-saturated faceted Ir(210) also produces large amounts of N2 and small amounts of NO without the formation of N2O. Adsorption of NO at 300 K on both surfaces is predominantly molecular. On planar Ir(210) NO adsorbs on atop sites for the entire NO coverage range. On faceted Ir(210) that contains (110) and {311} faces, NO adsorbs on...