In Situ Characterization of the 5d Density of States of Pt Nanoparticles upon Adsorption of CO
In Situ Characterization of the 5d Density of States of Pt Nanoparticles upon Adsorption of CO
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DOI：
10.1021/ja907760p
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发表时间：
2010-03-03
影响因子：
15
通讯作者：
van Bokhoven, Jeroen A.
中科院分区：
文献类型：
--
作者：
Glatzel, Pieter;Singh, Jagdeep;van Bokhoven, Jeroen A.
利用硬X射线共振非弹性X射线散射（RIXS）对Pt纳米粒子中的电子态的占据和未占据密度进行了元素选择性研究。当CO被吸附时，观察到d价带的开口。差距来源于Pt与CO之间的成键和反键轨道，CO的吸附堵塞了Pt的位，改变了Pt的电子结构，从而进一步钝化了Pt的催化活性。实验结果得到了多次散射计算的支持。
An element-selective study of the occupied and unoccupied density of electronic states in Pt nanoparticles was performed using hard X-ray resonant inelastic X-ray scattering (RIXS). An opening In the valence d band is observed when CO is adsorbed. The gap originates from bonding and antibonding orbitals between Pt and CO. The adsorption of CO blocks sites and changes the electronic structure, thus Further passivating the catalytic activity of Pt. The experimental results are Supported by full Multiple scattering calculations.