负载铂/铁的介孔β沸石用于一氧化碳氧化，具有高催化活性和耐水性。
Pt/Fe co-loaded mesoporous zeolite beta for CO oxidation with high catalytic activity and water resistance.
作者信息
Li Qinru, Zhou Xiaoxia, Zhao Wanpeng, Peng Chunlei, Wu Huixia, Chen Hangrong
机构信息
The Key Laboratory of Resource Chemistry of Ministry of Education, Shanghai Key Laboratory of the Rare Earth Functional Materials, Shanghai Municipal Education Committee Key Laboratory of Molecular Imaging Probes and Sensors, Shanghai Normal University Shanghai 200234 China.
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences 1295 Dingxi Road Shanghai 200050 P. R. China
出版信息
RSC Adv. 2019 Sep 6;9(48):28089-28094. doi: 10.1039/c9ra04599f. eCollection 2019 Sep 3.
A series of Pt/Fe co-loaded mesoporous zeolite beta (Pt/Fe-mBeta) catalysts with different Fe contents have been successfully synthesized by an ion exchange and subsequent ethylene glycol reduction method. The catalysts were characterized by XRD, N adsorption-desorption, TEM, SEM, XPS and H-TPR. The optimized sample Pt/Fe(3)-mBeta shows high catalytic activity for CO oxidation under dry conditions, and the complete conversion temperature of CO is as low as 90 °C. More importantly, the sample Pt/Fe(3)-mBeta also shows excellent water resistance and good durability, which could meet the practical needs of exhaust purification of diesel vehicles. It is believed that the synergistic effect between varied-valence Pt/Fe species and the mesoporous zeolite support with high surface area and good water resistance jointly contribute to the excellent catalytic performance.
通过离子交换和随后的乙二醇还原法成功合成了一系列具有不同铁含量的铂/铁共负载介孔β沸石（Pt/Fe-mBeta）催化剂。采用XRD、N吸附-脱附、TEM、SEM、XPS和H-TPR对催化剂进行了表征。优化后的样品Pt/Fe(3)-mBeta在干燥条件下对CO氧化表现出高催化活性，CO的完全转化温度低至90℃。更重要的是，样品Pt/Fe(3)-mBeta还表现出优异的耐水性和良好的耐久性，能够满足柴油车尾气净化的实际需求。据信，不同价态的Pt/Fe物种与具有高比表面积和良好耐水性的介孔沸石载体之间的协同作用共同促成了优异的催化性能。
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