【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-stora
【机 构】
：
Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics,
论文部分内容阅读
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 ℃ to 750 ℃.Upon reduction,the formed redox species characterized by EPR spectroscopy are the Mov ion and superoxide anion radical (O2-) when the reduction was induced at the optimal temperature of 300-350 ℃.When heating-up from 350 ℃,the EPR signals started to decline in amplitude.The signals in the range of 400-450 ℃ decreased to half of that at 350 ℃,and then to zero at ～600 ℃.Further treatment at even higher temperature or prolonged heating time at 500 ℃ caused more reduction and more free electrons were released to the MoO3 bulk,which results in a delocalized means similar to the antiferromagnetic coupling.These data herein are helpful to prepare and study the metal-oxide catalysts.
其他文献
Yanchi County is located in the agro-pastoral ecotone and belongs to the ecologically fragile area of Northwest China. It is important to study the evolution of
Landscapes of the mountainous regions in northwestern China comprise a unique pattern of vegetation, consisting of a mosaic of grassland and shrub-forest. Forests generally self-organize into ordered
目的 探讨适合八年制医学生物理诊断的CBL教学方法 .方法选择北京大学第三医院的临床医学专业八年制医学生.呼吸、循环及消化系统疾病《症状及异常体征》的物理诊断学课程分
该文报道了中国文字衣科地衣一新记录属——裂孔衣属(Schizotrema Mangold & Lumbsch)及其1个新记录种,即瓜岛裂孔衣[Schizotrema guadeloupense(Hale)Mangold& Lumbsch],标
该文在神农架国家公园内选取1 hm2的森林动态监测样地,利用方差比率法(VR)、χ2 统计量检验、联结系数(AC),研究了该群落的乔木层、灌木层、草本层优势种的种间联结性.结果表
菱科(Trapaceae)仅菱属(Trapa L.)1属,该属是典型的水生多型植物,中国乃至全球以往的分类处理分歧很大.基于文献查阅、野外采集、标本鉴定和栽培观察,对菱属植物分类的主要形
In this work,we investigated the energy transfer (EnT) and electron transfer (ET) processes as well as their relationship in the carbon quantum dots/rhodamine B
湖泊微生物作为湖泊生态系统重要组成部分,在局域和区域的元素循环中发挥着关键作用.由于自然环境中微生物之间的复杂关系和对微生物认知的片面性,可在实验室培养的湖泊微生