氧化铈稳定的CuO簇在CO,C_3H_6和NO消除中的催化性能(英文)  

Copper Oxide Clusters Stabilized by Ceria for CO,C_3 H_6,and NO Abatement

作　　者：石川[1,2] 徐力[1,2] 朱爱民[1,2] 张玉卓[1,2] 区泽棠[3] 

机构地区：[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

出　　处：《催化学报》2012年第9期1455-1462,共8页

基　　金：国家自然科学基金(20573014,21073024);辽宁省自然科学基金(201102034);中央高校基本科研业务费专项资金(DUT12LK23)~~

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950oC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.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 treaWaent at 950 ℃. Accordingly, by pre-dispersing CeO2 on 7-A1203 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.

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 

分 类 号：O643.32[理学—物理化学]