Surface structural change of alumina induced by electron impact in CO2, CO, O2 and D2O
Surface structural change of alumina induced by electron impact in CO2, CO, O2 and D2O
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DOI：
10.1016/0022-3115(88)90021-9
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发表时间：
1988-02
影响因子：
3.1
通讯作者：
S. Nagai
中科院分区：
文献类型：
--
作者：
S. Nagai
利用俄歇电子能谱（AES），比较了在CO2、CO、O2和D2O中电子轰击氧化铝和超高真空中电子轰击氧化铝表面结构的变化。电子在CO_2、O_2或D_2O中的碰撞抑制了在超高真空中进行的表面Al金属的形成，而在CO中的碰撞对Al_2O_3还原成Al金属没有影响，并在表面生成碳化铝。对电子束产生的Al金属与CO2和CO反应的实验表明，所观察到的CO2和CO效应分别是由产生的Al金属与来自CO2的O原子和来自CO的C原子反应引起的。
Change of surface structure of alumina by electron impact in CO2, CO, O2and D2O has been compared with that in ultra-high vacuum (UHV) using Auger electron spectroscopy (AES). Electron impact in CO2, O2or D2O suppresses the formation of Al metal on the surface which proceeds in UHV while the impact in CO has no effect on the reduction from alumina to Al metal and produces aluminium carbide on the surface. Experiments on the reaction of the Al metal produced by electron beams with CO2and CO showed that the observed effects due to CO2and CO were caused by reaction of the produced Al metal with O atoms from CO2and with C atoms from CO, respectively.