Research of the behaviour of O chemisorption on the (110) surface of Rhx-Pt1-x alloy

• 来源期刊: 中国物理（英文版）
• 关键词: chemisorption surface segregation recursion method density of states
• 年，卷（期）: 2006,（3）
• 页码范围: 641-644
• 页数: 4页
• 语种: 英文

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-Pt-x alloy surface by using the recursion method when O atoms are adsorbed on the Rhxx(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.