Surface Composition Evolution of Bimetallic Alloys under Reaction Conditions

doi:10.1021/acs.jpcc.9b08398

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Surface Composition Evolution of Bimetallic Alloys under Reaction Conditions
	Meng, J ; Zhu, BE ; Gao, Y
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	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
内容类型	期刊论文
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.