...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical chemistry chemical physics: PCCP >Synthesis, characterization and electrochemical properties of iron-zirconia solid solution nanoparticles prepared using a sol-gel technique
【24h】

Synthesis, characterization and electrochemical properties of iron-zirconia solid solution nanoparticles prepared using a sol-gel technique

机译：使用溶胶 - 凝胶技术制备铁 - 氧化锆固溶体纳米粒子的合成，表征和电化学性能

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The range of compositions and temperatures at which single-phase tetragonal and monoclinic Fe-containing zirconia nanoparticles are stable is reported. Both types of iron-doped zirconia particles were synthesized by annealing dried gels Fe_xZr_(1-x)O2, with nominal compositions in the range 0 ≤ x ≤ 0.15, over the range of temperatures between 400 °C and 1300 °C. Monophasic crystalline specimens of Fe-ZrO2 solid solutions were characterized by different techniques including X-ray powder diffraction (XRD), infrared and Raman spectroscopies (IR and Raman), and transmission electron microscopy (TEM). Energy gaps were estimated from diffuse reflectance ultraviolet-visible spectra (DRUV-Vis) and compared with those obtained from electrochemical data. Upon increasing the amount of iron in both types of iron-containing zirconia-based structures the energy gaps slightly lowered. The electrochemical properties of those solid solutions obtained using the voltammetry of microparticles (VPM) technique indicated the presence of a small portion of iron as Fe~(2+) in both types of crystalline Fe-doped ZrO2. Electrochemical data suggest that the monoclinic solid solutions provide a particularly high accessibility for promoting catalytic processes such as electrochemical oxygen reduction.
机译：报道了单相四方和单斜晶二氧化锆纳米颗粒稳定的组合物和温度的范围。通过退火干燥的凝胶Fe_xZr_（1-x）O 2来合成两种类型的铁掺杂氧化锆颗粒，其中标称组合物在0≤x≤0.15的范围内，在400℃和1300℃之间的温度范围内。通过不同的技术，包括X射线粉末衍射（XRD），红外和拉曼光谱（IR和拉曼）和透射电子显微镜（TEM）的单选性晶体的单选性晶体试样。从弥漫反射率紫外 - 可见光谱（DRUV-VI）估计能量间隙，并与电化学数据中获得的那些相比。在增加两种类型的含铁氧化锆的结构时，能量间隙略微降低。使用微粒（VPM）技术的伏安法获得的那些固溶体的电化学性质表明在两种类型的结晶Fe掺杂ZrO2中存在一小部分铁作为Fe〜（2+）。电化学数据表明，单斜液固体溶液提供了促进催化过程的特别高的可接受性，例如电化学氧还原。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号