Stabilizing CO on Au with NO2: electronegative species as promoters on coinage metals?
Stabilizing CO on Au with NO2: electronegative species as promoters on coinage metals?
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DOI：
10.1103/physrevlett.95.266102
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发表时间：
2005-12
影响因子：
8.6
通讯作者：
Tianfu Zhang;Zhipan Liu;S. Driver;S. J. Pratt;S. Jenkins;D. King
中科院分区：
文献类型：
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作者：
Tianfu Zhang;Zhipan Liu;S. Driver;S. J. Pratt;S. Jenkins;D. King
CO在NO(2)预掺杂的Au[111]上的吸附揭示了一种意想不到的有吸引力的共吸附相互作用，与CO拉伸频率前所未有的蓝移、红外NO(2)对称拉伸带的大幅衰减以及通过扫描隧道显微镜和低能电子衍射表征的(sq.rt(7) x sq.rt(7))R19度结构相关。密度泛函计算使我们能够合理化这些观察结果，并指出造币金属上电负性共吸附物的一般行为模式，对催化促进具有重要意义。
CO adsorption on NO(2)-predosed Au[111] reveals an unexpected attractive coadsorbate interaction, associated with an unprecedented blueshift of the CO stretch frequency, a sizeable attenuation of the infrared NO(2) symmetric stretch band, and a (sq.rt(7) x sq.rt(7))R19 degrees structure characterized by scanning tunneling microscopy and low energy electron diffraction. Density functional calculations allow us to rationalize these observations, and point towards a general pattern of behavior for electronegative coadsorbates on coinage metals, with important implications for catalytic promotion.