The catalyst discovery is of vital importance in many applications including chemical industry, environmental protection, and the development of sustainable energy. Currently, catalyst development is still a laborious and time-consuming work. The micro-combinatorial catalyst screening technique provides various advantages including high throughput, low consumption, and high integration density. It is applicable to large number of initial catalyst screening and subsequent optimization. This article reviews the recent progress of various micro-scale combinatorial catalyst screening techniques, including multi-well plate, microarray, multi-channel microreactor-based techniques.

Contents
1 Introduction
2 Micro-scale combinatorial catalyst screening techniques
2.1 Multi-well plate
2.2 Microarray
2.3 Multi-channel microreactor
3 Conclusion