| Research of the behaviour of O chemisorption on the (110) surface of Rhx--Pt1－x alloy |
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| 引用本文： | 张辉,张国英,王瑞丹,钟博.Research of the behaviour of O chemisorption on the (110) surface of Rhx--Pt1－x alloy[J].中国物理 B,2006,15(3):641-644. |
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| 作者姓名： | 张辉 张国英 王瑞丹 钟博 |
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| 作者单位： | College of Physical Science and Technology, Shenyang Normal University,Shenyang 110034, China;College of Physical Science and Technology, Shenyang Normal University,Shenyang 110034, China;College of Physical Science and Technology, Shenyang Normal University,Shenyang 110034, China;College of Physical Science and Technology, Shenyang Normal University,Shenyang 110034, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No 50571071). |
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| 摘 要： | An atomic group model of the disordered binary alloy Rhx-Pt1-x has been constructed to investigate surface segregation. According to the model, we have calculated the electronic structure of the Rhx-Pt1-x alloy surface by using the recursion method when O atoms are adsorbed on the Rhx-Pt1-x （110） surface under the condition of coverage 0.5. The calculation results indicate that the chemical adsorption of O changes greatly the density of states near the Fermi level, and the surface segregation exhibits a reversal behaviour. In addition, when x 〈 0.3, the surface on which O is adsorbed displays the property of Pt; whereas when x 〉 0.3 it displays the property of Rh.
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| 关 键 词： | 化学吸附 态密度 表面分离 物理化学 |
| 收稿时间： | 2005-04-27 |
| 修稿时间： | 2005-04-272005-10-21 |
Research of the behaviour of O chemisorption on the (110) surface of Rhx--Pt1－x alloy |
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| Zhang Hui,Zhang Guo-Ying,Wang Rui-Dan and Zhong Bo.Research of the behaviour of O chemisorption on the (110) surface of Rhx--Pt1－x alloy[J].Chinese Physics B,2006,15(3):641-644. |
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| Authors: | Zhang Hui Zhang Guo-Ying Wang Rui-Dan and Zhong Bo |
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| Institution: | College of Physical Science and Technology, Shenyang Normal University,Shenyang 110034, China |
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| Abstract: | An atomic group model of the disordered binary alloy Rh$_{x}$--Pt$_{1-x}$
has been constructed to investigate surface segregation. According to the
model, we have calculated the electronic structure of the Rh$_{x}$--Pt$_{1 -
x }$alloy surface by using the recursion method when O atoms are
adsorbed on the
Rh$_{x}$--Pt$_{1-x }$(110) surface under the condition of coverage 0.5. The
calculation results indicate that the chemical adsorption of O changes
greatly the density of states near the Fermi level, and the surface
segregation exhibits a reversal behaviour. In addition, when $x<0.3$, the
surface on which O is adsorbed displays the property of Pt; whereas when
$x>0.3$ it displays the property of Rh. |
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| Keywords: | chemisorption surface segregation recursion method density of states |
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