...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Direct Observation of the Reversible Changes of the Morphology of Pt Nanoparticles under Gas Environment
【24h】

Direct Observation of the Reversible Changes of the Morphology of Pt Nanoparticles under Gas Environment

机译：直接观察气体环境下Pt纳米颗粒形态的可逆变化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Large faceted Pt particles prepared in solution were in situ observed by ETEM (Environmental Transmission Electron Microscopy) during oxidation - reduction cycles. Reversible shape transformations were observed with the increase or decrease of the ratio of (111) faces to (001) faces in H2 and O2 respectively, at pressures of a few mbars. Under Hydrogen, the shape is relatively close to the Wulff shape of an fcc crystal under vacuum, while under oxygen, the (001) faces extend and the (111) faces shrink due to a stronger adsorption of oxygen on the more open (100) faces. Going from hydrogen to oxygen, the surface energy anisotropy is inverted.
机译：在氧化还原循环过程中，通过ETEM（​​环境透射电子显微镜）原位观察溶液中制备的大平面Pt颗粒。在几毫巴的压力下，随着H2和O2中（111）面与（001）面的比率的增加或减少，观察到可逆的形状转换。在氢气下，形状在真空下相对接近于fcc晶体的Wulff形状，而在氧气下，由于氧气在更开放的区域（100）上的较强吸附，（001）面扩展而（111）面收缩。面孔。从氢到氧，表面能各向异性被反转。

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