...
首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Characterization of AuPd nanoparticles by probe-corrected scanning transmission electron microscopy and X-ray absorption spectroscopy
【24h】

Characterization of AuPd nanoparticles by probe-corrected scanning transmission electron microscopy and X-ray absorption spectroscopy

机译:探针校正扫描透射电子显微镜和X射线吸收光谱法表征AuPd纳米粒子

获取原文
获取原文并翻译 | 示例
           

摘要

A heterogeneous catalyst consisting of AuPd nanoparticles dispersed on titanium oxide was synthesized by a colloidal route. The diameters of these nanoparticles range from 1 to 5 nm, as determined from scanning transmission electron microscopy (STEM) images recorded with a high-angle annular dark field detector (Z-contrast method). Bright field images obtained on an aberration-corrected STEM show the structure of the oxide support and the metal particles with high resolution. This microscope allows to record secondary electron images that provide supplementary information about the morphology of the support crystals and the localization of the particles on them. The combination of the images with the spectroscopic investigation of selected points and areas is of particular importance. Herein, efficiently collected energy-dispersive X-ray spectra give evidence for the formation of an AuPd alloy in the nanoparticles. This result is confirmed by the results of X-ray absorption spectroscopy (EXAFS) studies.
机译:通过胶体路线合成了由分散在氧化钛上的AuPd纳米颗粒组成的非均相催化剂。这些纳米粒子的直径范围是1到5 nm,这是通过用高角度环形暗场检测器(Z对比法)记录的扫描透射电子显微镜(STEM)图像确定的。在像差校正后的STEM上获得的明场图像以高分辨率显示了氧化物载体和金属颗粒的结构。该显微镜可以记录二次电子图像,这些图像可提供有关支撑晶体形态和颗粒在其上的定位的补充信息。图像与所选点和区域的光谱研究相结合特别重要。在本文中,有效收集的能量分散X射线光谱为纳米颗粒中AuPd合金的形成提供了证据。 X射线吸收光谱(EXAFS)研究的结果证实了这一结果。

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