...
  • 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, B. Condensed matter, materials, surfaces, interfaces & biophysical >Impact of the Residual Chlorine on the Heat of Adsorption of the Linear CO Species on Cu/Al_2O_3 Catalysts
【24h】

Impact of the Residual Chlorine on the Heat of Adsorption of the Linear CO Species on Cu/Al_2O_3 Catalysts

机译：残留氯气对Cu / Al_2O_3催化剂上线性CO物种吸附热的影响

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

The adsorption of CO at several adsorption temperatures (T_a) in the range of 300-550 K on several reduced ≈5 wt% Cu/Al_2O_3 solids, with and without residual chlorine, is studied by FTIR spectroscopy. Whatever the solid, the main adsorbed species is a linear (denoted by L) CO species adsorbed on Cu~o sites. On the Cl-free solids, the L CO species is detected at 2095 cm~(-1), while the presence of Cl leads to a shift to higher wavenumbers. The evolution of the coverage θ_L of the L CO species with the adsorption temperature for a constant CO partial pressure (P_(CO) = 1 kPa) allows us to determine the heat of adsorption of the L CO species as a function of the coverage on the various Cu-containing solids by using the AEIR method. It is shown that the presence of residual Cl has no impact on the heat of adsorption at low coverages (82 kJ/mol), while it decreases slightly the heat of adsorption at high coverages from 57 to 45 kJ/mol.
机译：通过FTIR光谱研究了在300〜550 K范围内的几种吸附温度（T_a）下，CO在数种还原的≈5wt％的Cu / Al_2O_3固体上有无氯的吸附。无论是哪种固体，主要吸附物质都是吸附在Cu〜o位上的线性（以L表示）CO物质。在不含氯的固体上，在2095 cm〜（-1）处检测到L CO物种，而Cl的存在导致向更高波数的转变。在恒定的CO分压（P_（CO）= 1 kPa）下，L CO物种的覆盖度θ_L随吸附温度的变化而变化，这使我们能够确定L CO物种的吸附热作为覆盖率的函数。通过AEIR方法可以得到各种含铜固体。结果表明，残留氯的存在对低覆盖率（82 kJ / mol）的吸附热没有影响，而高覆盖率的吸附热则从57 kJ / mol略微降低至45 kJ / mol。

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