...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysis science & technology >A study on the origin of the active sites of HDN catalysts using alumina-supported MoS3 nanoparticles as a precursor
【24h】

A study on the origin of the active sites of HDN catalysts using alumina-supported MoS3 nanoparticles as a precursor

机译：研究淬火的活动网站的起源催化剂使用alumina-supported MoS3纳米粒子作为前体

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

This article proposes alumina-supported MoS3 nanoparticles (NPs) as a precursor of model catalysts to study hydrodenitrogenation (HDN) catalytic mechanisms. The NPs were first loaded into gamma-Al2O3 by a simple chemical deposition method and then thermally treated under H-2, N-2 and H2S atmospheres, respectively, to obtain three MoS2/Al2O3 catalysts. The XPS, N-2 adsorption-desorption and HRTEM characterization results show that using MoS3 NPs instead of conventional MoOx NPs as the precursor can effectively tune the edge composition of the MoS2 phase while controlling its micromorphology and avoiding the strong interference from the alumina support to the phase, thus laying the foundation for accurate understanding of the origin of the active sites for HDN reactions. Then the catalytic activity of a series of MoS3-derived catalysts was thoroughly studied and comprehensive results are obtained after rationally deducing the "structure-function" relations: (i) two types of active sites exist in the HDN catalysts, one for the hydrogenation reaction which is related to both sulfur vacancies and brim sites and another for the C-N hydrogenolysis reaction which is connected with the -SH/S2- groups on the edge of the active phase; (ii) the edge composition directly influences the Ni-promoting effect and the "sulfur-deficient" edge structure is more beneficial for the promoter role of Ni. Due to the actual catalyst model first used, the resulting viewpoints exhibit valuable guiding significance for highly efficient HDN catalyst development.
机译：本文提出了alumina-supported MoS3纳米粒子的前体(NPs)模型催化剂研究hydrodenitrogenation(淬火)催化机制。到gamma-Al2O3通过一个简单的化学沉积方法,然后热处理2下,n - 2和H2S大气压,分别获得三个建设监理/氧化铝催化剂。adsorption-desorption介绍和描述结果表明,使用MoS3 NPs代替传统MoOx NPs的前身有效地优化二硫化钼的边缘成分而控制其微观形态学和阶段避免强烈的氧化铝的干扰支持阶段,从而奠定了基础对准确的起源的理解活跃的站点淬火反应。一系列MoS3-derived的催化活性催化剂是彻底的研究综合后得到的结果合理推断“结构”关系:(i)网站中存在两种类型的活跃淬火催化剂,加氢硫反应有关空缺职位和边缘网站和另一个碳氮这是与氢解反应sh / S2 -组边缘的活跃阶段;Ni-promoting效应和影响“sulfur-deficient”边缘结构有利于Ni的推动者的角色。实际催化剂模型,第一次使用产生的观点表现出有价值的指导意义高效淬火催化剂发展。

著录项

相似文献

  • 外文文献
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