【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 ,这种增强红外吸收取决于钯原子簇的纳米尺度及分子筛超笼的特殊环境更多还原

【Abstract】 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.更多还原