Surface Composition Evolution of Bimetallic Alloys under Reaction Conditions
文献类型：期刊论文
| 作者 | Meng, J; Zhu, BE; Gao, Y |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2019 |
| 卷号 | 123期号:46页码:28241-28247 |
| 关键词 | CO ADSORPTION CARBON-MONOXIDE SEGREGATION PD NANOPARTICLES NANOCATALYSTS TRANSITION STABILITY OXIDATION |
| ISSN号 | 1932-7447 |
| DOI | 10.1021/acs.jpcc.9b08398 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Surface composition is a critical factor determining the chemical and physical properties of bimetallic alloys, which highly depends on the alloy surface segregation behaviors. Recent in situ experiments revealed the dynamic and reversible alloy segregation changes in reaction conditions, leading to distinctive catalytic performances. Thus, how to predict and control the surface composition during catalytic reactions becomes crucial for nanoalloy catalysts. However, the experimental results are mostly complicated and sometimes contradictory, which can hardly be understood by current theoretical models. Herein, we propose an environmental segregation energy (E-eseg), which precisely describes the surface segregation behavior at a given temperature and gas pressure. Using CO as a probe, we reveal insights into the flexible alloy segregation trends under changing gas conditions and perfectly explain the existing experimental results. The surface composition evolutions of 72 binary alloys under various CO conditions are presented in the segregation maps. This work provides a guide to high-throughput prescreening of the desired surface composition under optimal conditions, which paves the way for tuning the alloy structure in real catalytic reactions. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32228]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 2.Chinese Acad Sci, Shanghai Adv Res Inst, Zhangjiang Lab, Shanghai 201210, Peoples R China 3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Meng, J,Zhu, BE,Gao, Y. Surface Composition Evolution of Bimetallic Alloys under Reaction Conditions[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2019,123(46):28241-28247. |
| APA | Meng, J,Zhu, BE,&Gao, Y.(2019).Surface Composition Evolution of Bimetallic Alloys under Reaction Conditions.JOURNAL OF PHYSICAL CHEMISTRY C,123(46),28241-28247. |
| MLA | Meng, J,et al."Surface Composition Evolution of Bimetallic Alloys under Reaction Conditions".JOURNAL OF PHYSICAL CHEMISTRY C 123.46(2019):28241-28247. |
入库方式： OAI收割
来源：上海应用物理研究所
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