• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Surface Science >Preparation of size-controlled Pt supported on Al_2O_3 nanocatalysts for deep catalytic oxidation of benzene at lower temperature
【24h】

Preparation of size-controlled Pt supported on Al_2O_3 nanocatalysts for deep catalytic oxidation of benzene at lower temperature

机译：Al_2O_3纳米催化剂上负载的Pt载体的制备，用于低温下苯的深度催化氧化

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

A series of Pt/Al2O3 catalysts possessing controlled Pt particle sizes (1.2-2.2 nm) could be single-step synthesized by means of modified ethylene glycol (EG) reduction approach. Their catalytic activities were evaluated for the catalytic complete oxidation of benzene, as typical volatile organic compounds (VOCs). The results showed that Pt/Al2O3 catalyst with 1.2 nm Pt size exhibited optimum catalytic oxidation activity of benzene at 145 degrees C. It has been confirmed that the content of Pt-0 species, which is regarded as active center for complete oxidation of benzene, is not the decisive factor in the process of benzene oxidation. The structure sensitivity was explained by the surface adsorbed oxygen. The electron transportation from Pt to O is in favour of the activation of adsorbed oxygen, which is beneficial to enhance catalytic activity. Moreover, the catalysts showed excellent adaptability for different VOCs and durability for benzene oxidation during the long-term continuous test, whether in dry air or in the coexistence of CO2, cyclohexane or H2O.
机译：一系列具有受控Pt粒径（1.2-2.2 nm）的Pt / Al2O3催化剂可以通过改进的乙二醇（EG）还原方法一步合成。评估了它们作为典型的挥发性有机化合物（VOC）对苯的催化完全氧化的催化活性。结果表明，Pt尺寸为1.2 nm的Pt / Al2O3催化剂在145℃时表现出最佳的苯催化氧化活性。已证实Pt-0物种的含量被认为是苯完全氧化的活性中心，不是苯氧化过程中的决定性因素。结构敏感性由表面吸附的氧气解释。从Pt到O的电子传输有利于吸附氧的活化，这有利于增强催化活性。此外，无论在干燥空气中还是在CO2，环己烷或H2O共存下，催化剂在长期连续测试过程中均显示出对不同VOC的出色适应性和苯氧化的耐久性。

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