一、引言负载型金属催化剂在工业上有着很广泛的应用。这种催化剂的性质不但与金属有关,而且与担体的性质也密切相关,它的表面氢溢出现象(Spillover)就是一个很明显的例子。这一现象是1964年提出的,此后人们采用各种实验方法进行研究已经确证这一现象是存在的,但对它的机理至今仍在继续探讨中。1983年9月在法国举行了第一次国际性催化剂会议专门讨论溢出现象。 I. Introduction Supported metal catalysts have a very wide range of industrial applications. The nature of this catalyst is not only metal but also closely related to the nature of the support. Its surface hydrogen spillover is an obvious example. This phenomenon was proposed in 1964, and since then people have confirmed that this phenomenon exists using various experimental methods, but its mechanism is still continuing to explore. The first international catalyst conference was held in France in September 1983 to devote special attention to the spillover.