催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (5): 853-861.DOI: 10.1016/S1872-2067(10)60211-2

• 研究论文 • 上一篇    下一篇

钾对氧化铜催化活性炭还原 NO 反应的助催化作用

冯柄楠, 卢冠忠*, 王艳芹, 郭耘, 郭杨龙   

  1. 华东理工大学结构可控先进功能材料及其制备教育部重点实验室, 工业催化研究所 上海 200237
  • 收稿日期:2010-11-19 修回日期:2011-02-17 出版日期:2011-05-31 发布日期:2014-09-29

Promoting Role of Potassium on the Catalytic Performance of Copper Oxide for the Reduction of NO by Activated Carbon

FENG Bingnan, LU Guanzhong*, WANG Yanqin, GUO Yun, GUO Yanglong   

  1. Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China
  • Received:2010-11-19 Revised:2011-02-17 Online:2011-05-31 Published:2014-09-29

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摘要： 研究了活性炭负载的 Cu-K-O 复合氧化物催化剂上碳还原 NO 的反应. 结果表明, K 的加入可有效地提高 CuO 催化剂的活性和稳定性, 当 Cu/K 的质量比为 2 时催化性能最佳. X 射线衍射、X 射线光电子能谱和程序升温脱附-质谱等结果表明, K 与 Cu 间的协同作用可促进表面碳活化中心与表面氧物种生成 CO2 的反应, 保持表面 Cu2+活性中心的数量, 从而有利于 Cu2+/Cu+ 反应循环的进行.

关键词: 钾, 氧化铜, 活性炭, 一氧化氮, 选择性催化还原

Abstract: The reduction of NO by activated carbon over a Cu-K-O mixed oxide catalyst was investigated. We found that the addition of K to CuO obviously improved its catalytic performance and stability, and the optimum Cu/K weight ratio is 2. Characterization by X-ray photoelectron spectroscopy, X-ray diffraction, and temperature-programmed desorption shows that the presence of K can promote the reaction between the surface carbon active sites and the surface oxygen species to form CO2 by a synergetic effect between Cu and K. Additionally, a higher surface concentration of Cu2+ is retained, which favors the Cu2+/Cu+ reduction cycle on the active sites.

Key words: potassium, copper oxide, activated carbon, nitrogen monoxide, selective catalytic reduction