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NO Adsorption on Ag/Pt(110)-(1×2) Bimetallic Surfaces: Unexpected Formation of Nitrite/nitrate Surface Species
Jin-bing Li,Zhi-quan Jiang,Wei-xin Huang*
Author NameAffiliationE-mail
Jin-bing Li Yanshan Branch of SINOPEC Beijing Research Institute of Chemical Industry, Beijing 102500, China  
Zhi-quan Jiang Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key -Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Wei-xin Huang* Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key -Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China huangwx@ustc.edu.cn 
Abstract:
NO adsorption on Ag/Pt(110)-(1×2) bimetallic surfaces at room temperature was inves-tigated by means of Auger electron spectroscopy, X-ray photoelectron spectroscopy and thermal desorption spectroscopy. An unexpected formation of nitrite/nitrate surface species on Ag/Pt(110)-(1×2) bimetallic surfaces is observed, then decompose at elevated tempera-tures to form N2. However, such nitrite/nitrate surface species do not form on clean Pt(110) and Ag-Pt alloy surfaces upon NO exposure at room temperature. The formation of ni-trite/nitrate surface species on Ag/Pt(110)-(1×2) bimetallic surfaces is attributed to high reactivity of highly coordination-unsaturated Ag clusters and the synergetic effect between Ag clusters and Pt substrate.
Key words:  Nitric oxide, Ag-Pt bimetallic surface, Nitrite/nitrate surface species, Syner-getic effect
FundProject:
NO在Ag/Pt(110)-(1×2)双金属表面的吸附:亚硝酸盐/硝酸盐表面物种的生成
李金兵,姜志全,黄伟新*
摘要:
以俄歇电子能谱、X射线光电子能谱和热脱附谱研究了室温下NO在Ag/Pt(110)-(1×2)双金属表面的吸附. 在该双金属表面上观察到了可能的亚硝酸盐/硝酸盐表面物种,其在更高温度下分解生成N2. 然而,室温下NO在清洁Pt(110)表面和Ag-Pt合金表面上并不会生成这种亚硝酸盐/硝酸盐表面物种. 亚硝酸盐/硝酸盐表面物种的形成归因于高度配位不饱和Ag粒子的高活性及其与Pt基底之间的协同作用.
关键词:  一氧化氮,Ag-Pt双金属表面,亚硝酸盐/硝酸盐表面物种,协同作用
DOI:10.1088/1674-0068/24/06/735-740
分类号: