催化学报

催化学报 ›› 2012, Vol. 33 ›› Issue (9): 1455-1462.DOI: 10.1016/S1872-2067(11)60417-8

• 研究论文 • 上一篇    下一篇

氧化铈稳定的 CuO 簇在 CO, C3H6 和 NO 消除中的催化性能

石川1,2,*, 徐力1,2, 朱爱民1,2, 张玉卓1,2, 区泽棠3   

  1. 1大连理工大学工业生态与环境工程重点实验室, 辽宁大连 116024; 2大连理工大学等离子体物理化学实验室, 辽宁大连 116024; 3香港浸会大学化学系, 香港九龙塘 999077
  • 收稿日期:2012-04-06 修回日期:2012-05-09 出版日期:2012-09-11 发布日期:2012-09-11

Copper Oxide Clusters Stabilized by Ceria for CO, C3H6, and NO Abatement

SHI Chuan1,2,*, XU Li1,2, ZHU Aimin1,2, ZHANG Yuzhuo1,2, AU Chak Tong3   

  1. 1Key Laboratory of Industrial Energy and Environmental Engineering (MOE), Dalian University of Technology, Dalian 116024, Liaoning, China; 2Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China; 3Department of Chemistry, Center for Surface Analysis and Research, Hong Kong Baptist University, Kowloon Tong 999077, Hong Kong, China
  • Received:2012-04-06 Revised:2012-05-09 Online:2012-09-11 Published:2012-09-11

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摘要： 研究了 CuO 与 γ-Al2O3 和 CeO2 的相互作用, 并由此制备出能有效脱除 CO, C3H6 和 NO 的催化剂, 考察了不同载体表面 CuO 簇的分散稳定性和耐老化性能. 结果发现, 随 CuO 负载量的增加, CuO 簇因与 CeO2 载体的强相互作用而稳定存在; 而在 γ-Al2O3 表面, CuO 簇易聚集成较大的颗粒. 另一方面, 由于 CeO2 本身较差的热稳定性, 表面分散的 CuO 在 950 oC 高温处理后烧结. 因此, 基于 γ-Al2O3 载体优越的耐老化性能, 在 γ-Al2O3 载体分散 CeO2, 然后再担载 CuO, 从而得到了稳定的 CuO 簇, 所得催化剂比 CuO/γ-A12O3 和 CuO/CeO2 具有更好的催化性能和抗热老化性能.

关键词: 氧化铜簇, 稳定性, 表面相互作用, 一氧化碳, 丙烯, 一氧化氮, 催化消除

Abstract: A strong interaction between a metal oxide and support has long been indicative of its promotion of catalytic activities. In connection with this, we investigated the interaction of CuO with γ-Al2O3 and CeO2 for producing highly efficient catalysts for CO, C3H6, and NO abatement. In particular, the dispersion and thermal aging resistance of CuO clusters on different supports were studied. CuO clusters can be stabilized by interaction with CeO2, while on γ-Al2O3 they aggregated into larger particles at high CuO loadings. On the other hand, due to the poor thermal stability of CeO2, CuO clusters dispersed on it were sintered during an aging treatment at 950 oC. Accordingly, by pre-dispersing CeO2 on γ-Al2O3 followed by CuO dispersion, stabilized CuO clusters were obtained that were based on the superior aging resistance of the γ-Al2O3 support. Therefore, better catalytic performance and thermal aging properties were obtained with a CuO/CeO2/γ-Al2O3 catalyst as compared with CuO/γ-Al2O3 and CuO/CeO2 samples.

Key words: copper oxide clusters, stability, surface interaction, carbon monoxide, propene, nitric oxide, catalytic abatement