Photodesorption of CO and CO+ from Pt(111): Mechanism and site specificity
Photodesorption of CO and CO+ from Pt(111): Mechanism and site specificity
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Pt(111) 中 CO 和 CO 的光解吸：机理和位点特异性
DOI：
10.1063/1.469697
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发表时间：
1995
影响因子：
4.4
通讯作者：
Y. Murata
中科院分区：
文献类型：
--
作者：
K. Fukutani;Moon;Y. Murata
利用（2+1）共振增强多光子电离和反射吸收红外光谱研究了CO和CO+在Pt（111）表面80 K的紫外光脱附. CO和CO+的脱附分别以单光子和三光子过程发生在顶部位点。解吸CO的旋转，振动和平移温度约为130，3700和2000 K，这是相当高的样品温度。中性CO脱附的阈值能量在2.3 ~ 3.5eV之间，表明脱附是由未占据的2π态引起的。
Ultraviolet photodesorption of CO and CO+ from Pt(111) at 80 K is investigated by (2+1) resonance‐enhanced multiphoton ionization and reflection absorption infrared spectroscopy. Desorption of CO and CO+ occurs at the on‐top site as single‐photon and three‐photon processes, respectively. The rotational, vibrational, and translational temperatures of desorbed CO are approximately 130, 3700, and 2000 K, which are considerably higher than the sample temperature. The threshold energy of neutral CO desorption lies between 2.3 and 3.5 eV suggesting that an unoccupied 2π state is responsible for the desorption.