溢流氢效应对多相催化反应性能的调控

Controlling the catalytic performance of heterogeneous catalysts based on hydrogen spillover effect

氢溢流现象广泛存在于多相催化反应中,氢活性物种在不同催化组分之间的传递行为实现了反应物在非解离氢活性位上的加氢过程。通过对催化剂的合理构筑,氢溢流现象的产生可以实现对许多重要催化反应活性、选择性和稳定性的调控。综述如何围绕氢溢流加氢机制设计新型高效多相加氢催化剂及其在一些重要催化反应中的应用。

Hydrogen spillover exists widely in heterogeneous catalytic reactions. A unique contribution of this phenomenon is that some unsaturated reactants can be hydrogenated on inactive hydrogen -dissocia- ted sites by virtue of the diffusion of dissociated hydrogen from active metals to the support. By a national design of catalyst, hydrogen spillover is able to adjust catalytic perfomance, selectivity and stability of many reactions. In this article, we will provide an overview of recently important applications of hydrogen spillover effect on heterogeneous catalytic reactions and describe how to fabricate new effective catalysts based on this effect.