红外光谱表明吸附在担载于Al_2O_3上的Pd-Cu、Pd-Ag、Pd-Co和Pd-Pt 双组分催化剂上的CO仍保持其在单金属上的主要吸附物种,但其部分CO吸收带发生位移,吸附的CO易于脱附.CO在还原态Pd-Cu和Pd-Ag双金属催化剂上以吸附于Pd上者为主,其吸收带明显变弱而更易脱附.在Pd- Pt和Pd-Co氧化和还原态催化剂上CO桥式和线式吸收带强度比发生显著变化.似乎在这二类双金属催化剂上的几何结构效应比电子配位效应更为明显. Infrared spectra showed that the CO adsorbed on the Pd-Cu, Pd-Ag, Pd-Co and Pd-Pt bicomponent catalysts supported on Al 2 O 3 still retained its main adsorption species on the single metal, but some of its CO absorption The adsorption of CO on the Pd-Cu and Pd-Ag bimetallic catalysts is mainly on the Pd, the absorption band is significantly weaker and easier to desorb. In Pd-Pt And Pd-Co oxidation and reduction catalyst on the CO bridge and linear absorption band intensity ratio changes significantly.It seems that in these two types of bimetallic catalyst geometry effect than the electron coordination effect more obvious.