• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Model studies in heterogeneous catalysis
【24h】

Model studies in heterogeneous catalysis

机译：非均相催化的模型研究

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

I review a concept that models heterogeneous catalysis based on a surface-science approach. It is shown that models catching part of the complexity of the real system, which is connected with the finite size of active components and the flexibility of the arrangement of atoms in the active component, play an important part in determining the activity and selectivity of the system. I have chosen several examples from our own laboratory to elaborate the details and will put those into perspective with respect to the literature. I will show that Pd nanoparticles in hydrogenation incorporate hydrogen, which turns out to be crucial for the actual hydrogenation step. Another example correlates the structure of vanadia monolayer catalysts with its reactivity in methanol oxidation. With a third example we address the question of charge on Au nanoparticles when anchored to an oxide surface, a problem heavily discussed in the literature. Further examples refer to ultrathin oxide film catalysts in which the oxide metal interface controls either the charge state of Au particles grown on the film, and, in a last example, the oxide film itself exhibits remarkable CO-oxidation activity, which can be traced to a reactive intermediate structure of the ultrathin film.
机译：我回顾了一种基于表面科学方法对多相催化建模的概念。结果表明，模型捕获了部分实际系统的复杂性，这与活性成分的有限大小和活性成分中原子排列的灵活性有关，在确定活性的活性和选择性方面起着重要作用。系统。我从我们自己的实验室中选择了几个例子来详细说明细节，并将其与文献进行比较。我将证明氢化中的Pd纳米颗粒会掺入氢，这对于实际的氢化步骤至关重要。另一个实例将钒单层催化剂的结构与其在甲醇氧化中的反应性相关联。在第三个例子中，我们讨论了锚定在氧化物表面上时金纳米颗粒上带电的问题，这一问题在文献中已被大量讨论。进一步的实例涉及超薄氧化物膜催化剂，其中氧化物金属界面控制在膜上生长的Au颗粒的电荷状态，并且在最后一个实例中，氧化物膜本身表现出显着的CO氧化活性，这可以追溯到超薄膜的反应性中间结构。

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