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题名: Structural transformation of Pd-alpha-Fe2O3 and Pd-gamma-Fe2O3 catalysts and application in the CO oxidation reaction
作者: Xu, Hong1;  Ni, Ke1;  Li, Xiaokun1;  Fang, Guangzong2;  Fan, Guohong1
刊名: RSC ADVANCES
发表日期: 2017
DOI: 10.1039/c7ra09580e
卷: 7, 期:81, 页:51403-51410
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Pd-alpha-Fe2O3 and Pd-gamma-Fe2O3 catalysts were acquired by treating Pd-Fe catalysts with redox pretreatment. These catalysts were characterized by various techniques and applied in the CO oxidation reaction. Characterization reveals that the Pd-alpha-Fe2O3 catalyst is obtained after calcination in air at 400 degrees C. The following reduction at lower temperature forms the Pd-gamma-Fe2O3 catalyst. In the case of larger Pd (or PdO) and Fe2O3 nanoparticles, the Pd-gamma-Fe2O3 catalyst is highly active for low temperature CO oxidation compared with the Pd-alpha-Fe2O3 catalyst, which may originate from the high oxygen storage properties of gamma-Fe2O3 and stronger interaction between Pd and gamma-Fe2O3. Higher reduction temperature results in much larger particle sizes and decreased activity. Stability tests also indicate that the highly active Pd-gamma-Fe2O3 catalyst could transform to Pd-alpha-Fe2O3 in reactive atmosphere, leading to catalyst deactivation. Re-reduction treatment of the inactivated catalyst results in reproduction of the activity.
关键词[WOS]: RAY PHOTOELECTRON-SPECTROSCOPY ;  METAL-SUPPORT INTERACTIONS ;  LOW-TEMPERATURE ;  CARBON-MONOXIDE ;  PREFERENTIAL OXIDATION ;  BIMETALLIC CATALYSTS ;  PD CATALYSTS ;  XPS SPECTRA ;  IRON-OXIDES ;  PT-FE
语种: 英语
WOS记录号: WOS:000414780700039
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/149739
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Anhui Univ Technol, Sch Chem & Chem Engn, Maanshan 243002, Anhui, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Xu, Hong,Ni, Ke,Li, Xiaokun,et al. Structural transformation of Pd-alpha-Fe2O3 and Pd-gamma-Fe2O3 catalysts and application in the CO oxidation reaction[J]. RSC ADVANCES,2017,7(81):51403-51410.
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