CO在载钯分子筛薄膜电极上的增强红外吸收  

Enhancement of IR Absorption of CO Adsorbed on Palladium-loading Zeolite Thin Film Electrode

作　　者：姜艳霞[1] 孙世刚[1] 陈声培[1] 丁楠[1] 

机构地区：[1]厦门大学固体表面物理化学国家重点实验室化学系,物理化学研究所,厦门361005

出　　处：《高等学校化学学报》2001年第11期1860-1863,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 9830 0 6 0 );教育部博士学科点专项科研基金 (批准号 :19990 3840 3)资助

摘　　要：以 Na Y分子筛超笼为微型反应器 ,通过“瓶中造船”技术合成钯原子簇 ( Pd1 3 ) .并首次把粗糙的分子筛薄膜电极引入到电化学原位红外反射光谱研究 ,发现了一类新的增强红外吸收现象 .与金属钯电极相比 ,CO红外吸收带的谱峰强度显著增加 ,半峰宽加宽 .研究结果表明 。In the present paper, clusters or nanoparticles of palladium were synthesized by using ship in a bottle technology in supercages of Y zeolite. In situ electrochemical FTIR reflection spectroscopy was employed to study CO adsorption on nanoparticles of Pd in supercages of Y zeolte. A novel phenomenon of enhancement of IR absorption of adsorbed CO was revealed for the first time. In comparison with IR absorption of CO adsorbed on a massive palladium electrode, IR absorption of CO adsorbed on nanoparticles of Pd has been enhanced up to about 40 times. The results also demonstrated that the new phenomenon of enhancement of IR absorption is related to the nanometer scale of Pd clusters and also to the particular environment of supercages of Y zeolite.

关 键 词：Y-分子筛 钯原子簇 CO 吸附 原闰FTIRs 增强红外吸收 薄膜电极 负载型催化剂 电催化剂 电催化机理 

分 类 号：O643.32[理学—物理化学] O646.5[理学—化学]