• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Facile synthesis of hollow hierarchical Ni/gamma-Al2O3 nanocomposites for methane dry reforming catalysis
【24h】

Facile synthesis of hollow hierarchical Ni/gamma-Al2O3 nanocomposites for methane dry reforming catalysis

机译：方便的合成空心Ni /γ-Al2O3纳米级复合材料用于甲烷干重整催化

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

Hydrogen reduction of hierarchical spinel intermediates that were synthesized by a facile hydrothermal method results in Ni/gamma-Al2O3 nanocomposites with Ni nanoparticles (similar to 5.5 nm) well dispersed and embedded in nanoflakes of the hollow Al2O3 microspheres. The good dispersion of small metal nanoparticles and strong metal-support interactions that resulted from decomposition of spinel intermediates during reduction are essential for the efficient and sustainable high temperature dry reforming of methane (DRM) catalysis. The high surface area (170 m(2) g(-1)) composite catalysts show coke and sintering resistance in long term DRM catalysis at 750 degrees C, the highest temperature ever tested for hierarchical nanostructures. Ni loadings and the calcination temperatures of the spinel intermediate are investigated for their effect on the morphology and the catalytic performance of the final catalysts. It is interesting that some initially non-active control catalysts can be activated during long term testing.
机译：通过简便的水热方法合成的尖晶石中间体的氢还原反应产生的Ni /γ-Al2O3纳米复合材料中，Ni纳米颗粒（类似于5.5 nm）很好地分散并嵌入中空Al2O3微球的纳米薄片中。小型金属纳米颗粒的良好分散性以及还原过程中尖晶石中间体分解产生的强金属-载体相互作用对于甲烷的高效，可持续高温干重整（DRM）催化至关重要。高表面积（170 m（2）g（-1））复合催化剂在750摄氏度的长期DRM催化中显示出耐焦炭性和耐烧结性，这是对分级纳米结构进行测试的最高温度。研究了镍负载量和尖晶石中间体的煅烧温度对最终催化剂的形态和催化性能的影响。有趣的是，一些长期不活跃的控制催化剂可以在长期测试中被活化。

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