• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Nanomaterials >Catalytic Performance of Toluene Combustion over Pt Nanoparticles Supported on Pore-Modified Macro-Meso-Microporous Zeolite Foam
【2h】

Catalytic Performance of Toluene Combustion over Pt Nanoparticles Supported on Pore-Modified Macro-Meso-Microporous Zeolite Foam

机译：孔修饰的大中观微孔沸石泡沫负载的Pt纳米颗粒上甲苯燃烧的催化性能

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Herein, to investigate the pore effect on toluene catalytic oxidation activity, novel supports for Pt nanoparticles—ZSM-5 foam (ZF) fabricated using polyurethane foam (PUF) templates and pore-modified ZSM-5 foam (ZF-D) treated by acid etching, comparing with conventional ZSM-5 and pore-modified ZSM-5 (ZSM-5-D), were successfully synthesized. Pt nanoparticles were loaded on series ZSM-5 supports by the impregnation method. The Pt loaded on ZF-D (Pt/ZF-D) showed the highest activity of toluene catalytic combustion (i.e., T = 158 °C), with extraordinary stability and an anti-coking ability. Based on various catalysts characterizations, the unique macropores of ZF facilitated the process of acid etching as compared to conventional ZSM-5. The mesopores volume of ZF-D significantly increased due to acid etching, which enlarged toluene adsorption capacity and led to a better Pt distribution since some Pt nanoparticles were immobilized into some mesopores. Specifically, the microporous distribution was centered in the range of 0.7–0.8 nm close to the molecular diameter of toluene (ca. 0.67 nm), which was key to the increasing toluene diffusion rate due to pore levitation effect of catalysts and accessibility of metal. Furthermore, the reducibility of Pt nanoparticles was improved on Pt/ZF-D, which enhanced the activity of toluene catalytic oxidation.
机译：在此，为了研究孔对甲苯催化氧化活性的影响，使用聚氨酯泡沫（PUF）模板和酸改性的孔改性ZSM-5泡沫（ZF-D）制备了Pt纳米颗粒的新型载体-ZSM-5泡沫（ZF）。与常规的ZSM-5和孔改性的ZSM-5（ZSM-5-D）相比，成功地合成了腐蚀。通过浸渍方法将铂纳米颗粒负载在ZSM-5系列载体上。负载在ZF-D上的Pt（Pt / ZF-D）具有最高的甲苯催化燃烧活性（即T = 158°C），具有出色的稳定性和抗焦化能力。基于各种催化剂的特征，与传统的ZSM-5相比，ZF的独特大孔促进了酸蚀工艺。 ZF-D的中孔体积由于酸蚀刻而显着增加，这扩大了甲苯的吸附能力并导致更好的Pt分布，因为一些Pt纳米颗粒被固定在某些中孔中。具体来说，微孔分布集中在接近甲苯分子直径（约0.67 nm）的0.7-0.8 nm范围内，这是由于催化剂的孔隙悬浮作用和金属可及性而导致甲苯扩散速率提高的关键。此外，在Pt / ZF-D上提高了Pt纳米颗粒的还原性，从而增强了甲苯催化氧化的活性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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