Citation: LI Jin-Bing, JIANG Zhi-Quan, HUANG Wei-Xin. Adsorption and Decomposition of NO₂ on Ag/Pt(110) Bimetallic Surface[J]. Acta Physico-Chimica Sinica doi: 10.3866/PKU.WHXB201301241 shu

Adsorption and Decomposition of NO₂ on Ag/Pt(110) Bimetallic Surface

1.
1 Yanshan Branch of SINOPEC Beijing Research Institute of Chemical Industry, SINOPEC, Beijing 102500, China;
2 Hefei National Laboratory for Physical Sciences at the Microscale, Chinese Academy of Sciences, Key Laboratory of Materials for Energy Conversion and Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, Anhui, China

Received Date: 28 November 2012
Available Online: 24 January 2013
Fund Project: 国家自然科学基金(11079033)资助项目 (11079033)

The adsorption and decomposition of NO₂ on Ag/Pt(110) bimetallic surfaces have been investigated by Auger electron spectroscopy (AES) and thermal desorption spectroscopy (TDS). At room temperature, NO₂ under es dissociative chemisorption on Ag/Pt(110) bimetallic surfaces, forming chemisorbed NO(ads) and O(ads). Upon heating, NO(ads) under es both desorption from the surface and further decomposition. At 500 K, NO₂ chemisorbs dissociatively on Ag/Pt(110) bimetallic surfaces, forming O(ads). Electron transfer occurs from Pt to Ag, therefore, the presence of Ag on Pt(110) surface weakens the binding energy of O(ads) with the surface and decreases the temperature required for the recombinative desorption of O(ads) from the surface. We observed the formation of a Ag/Pt(110) alloy structure that exhibits catalytic activity towards NO₂ decomposition similar to that of Pt(110)-(1×2) but with a binding energy towards O(ads) much lower than that of Pt(110)-(1×2). Such a Ag/Pt(110) alloy structure may be active in catalyzing the direct decomposition of NO_x at relatively low temperatures.
- Ag/Pt(110) bimetallic surface,
- NO₂,
- Chemisorption,
- Decomposition,
- Promotion effect
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沈阳化工大学材料科学与工程学院沈阳 110142

Adsorption and Decomposition of NO2 on Ag/Pt(110) Bimetallic Surface

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通讯作者: 陈斌, bchen63@163.com

Adsorption and Decomposition of NO₂ on Ag/Pt(110) Bimetallic Surface