Temperature-Dependent Formation of Redox Sites in Molybdenum Trioxide Studied by Electron Paramagnetic Resonance Spectroscopy

	Temperature-Dependent Formation of Redox Sites in Molybdenum Trioxide Studied by Electron Paramagnetic Resonance Spectroscopy
	Tan Tian 2; Chen Ming 2; Su JiHu 2; Du JiangFeng 2
刊名	CHINESE JOURNAL OF CHEMICAL PHYSICS
	2019
卷号	32 期号:6 页码:657-660
关键词	OXYGEN INTERACTION MoO3 Thermal reduction Mo-v Superoxide anion radical Electron paramagnetic resonance spectroscopy
ISSN号	1674-0068
英文摘要	The formation and qualification of redox sites in transition metal oxides are always the active fields related to electronics, catalysis, sensors, and energy-storage units. In the present study, the temperature dependence of thermal reduction of MoO3 was surveyed at the range of 350 degrees C to 750 degrees C. Upon reduction, the formed redox species characterized by EPR spectroscopy are the Mo-V ion and superoxide anion radical (O-2(-)) when the reduction was induced at the optimal temperature of 300-350 degrees C. When heating-up from 350 degrees C, the EPR signals started to decline in amplitude. The signals in the range of 400-450 degrees C decreased to half of that at 350 degrees C, and then to zero at similar to 600 degrees C. Further treatment at even higher temperature or prolonged heating time at 500 degrees C caused more reduction and more free electrons were released to the MoO3 bulk, which results in a delocalized means similar to the anti-ferromagnetic coupling. These data herein are helpful to prepare and study the metal-oxide catalysts.
资助项目	[National Key R&D Program of China] ; [AnHui Initiative in Quantum Information Technologies]
语种	英语
CSCD记录号	CSCD:6643847
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/138916]
专题	中国科学院近代物理研究所
作者单位	1.University Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Peoples R China 2.中国科学技术大学 3.中国科学院近代物理研究所 4.中国科学院
推荐引用方式 GB/T 7714	Tan Tian,Chen Ming,Su JiHu,et al. Temperature-Dependent Formation of Redox Sites in Molybdenum Trioxide Studied by Electron Paramagnetic Resonance Spectroscopy[J]. CHINESE JOURNAL OF CHEMICAL PHYSICS,2019,32(6):657-660.
APA	Tan Tian,Chen Ming,Su JiHu,&Du JiangFeng.(2019).Temperature-Dependent Formation of Redox Sites in Molybdenum Trioxide Studied by Electron Paramagnetic Resonance Spectroscopy.CHINESE JOURNAL OF CHEMICAL PHYSICS,32(6),657-660.
MLA	Tan Tian,et al."Temperature-Dependent Formation of Redox Sites in Molybdenum Trioxide Studied by Electron Paramagnetic Resonance Spectroscopy".CHINESE JOURNAL OF CHEMICAL PHYSICS 32.6(2019):657-660.