Active Phase of FeOx/Pt Catalysts in Low-Temperature CO Oxidation and Preferential Oxidation of CO Reaction
文献类型：期刊论文
| 作者 | Chen, Hao1,2; Liu, Yun1,2; Yang, Fan2; Wei, Mingming1,2; Zhao, Xinfie1,2; Ning, Yanxiao2; Liu, Qingfei1,2; Zhang, Yi1,2; Fu, Qiang2; Bao, Xinhe2 |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2017-05-18 |
| 卷号 | 121页码:10398-10405 |
| DOI | 10.1021/acs.jpcc.7b01392 |
| 英文摘要 | The interface between metal and reducible oxide has attracted increasing interest in catalysis. The FeOx Pt interface has been a typical example, which showed remarkable activity for the preferential oxidation of CO (PROX) at low temperatures. However, model catalytic studies under vacuum conditions or in high-pressure O-rich environment at 450 K have reported two different active phases with iron in two different valence states, invoking a possible pressure gap. To identify the active phase for low-temperature CO oxidation and PROX, it is necessary to investigate the stability and activity of FeO/Pt(111) under the realistic reaction conditions. We thus conducted an in situ study on FeO/Pt(111) from ultrahigh vacuum to the atmospheric pressure of reactant gases. Our study shows FeO islands were easily, oxidized in 1 Torr O-2 to form the trilayer FeO2 islands. However, the presence of 2 Torr CO could prevent the oxidation of FeO islands and lead to CO oxidation at the FeO/Pt(111) interface. The FeO/Pt(111) surface exhibits an excellent activity for CO, production with an initial reaction rate measured to be similar to X 10(14) molecules-cm(-2)-s(-1) at 300 K. FeO islands supported on Pt(111) were further investigated in the PROX gas, i.e., the mixture of 98.5% H-2, 1% CO, and 0.5% O-2 at elevated pressures up to 1 bar. Our results thus bridged the pressure gap and identified the bilayer FeO islands on Pt(111) as the active phase for PROX under the realistic reaction conditions. |
| 语种 | 英语 |
| WOS记录号 | WOS:000402024200017 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/152192]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Collaborat Innovat Ctr Chem Energy Mat, State Key Lab Catalysis,CAS Ctr Excellence Nanosc, Zhongshan Rd 457, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Hao,Liu, Yun,Yang, Fan,et al. Active Phase of FeOx/Pt Catalysts in Low-Temperature CO Oxidation and Preferential Oxidation of CO Reaction[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2017,121:10398-10405. |
| APA | Chen, Hao.,Liu, Yun.,Yang, Fan.,Wei, Mingming.,Zhao, Xinfie.,...&Bao, Xinhe.(2017).Active Phase of FeOx/Pt Catalysts in Low-Temperature CO Oxidation and Preferential Oxidation of CO Reaction.JOURNAL OF PHYSICAL CHEMISTRY C,121,10398-10405. |
| MLA | Chen, Hao,et al."Active Phase of FeOx/Pt Catalysts in Low-Temperature CO Oxidation and Preferential Oxidation of CO Reaction".JOURNAL OF PHYSICAL CHEMISTRY C 121(2017):10398-10405. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。