Conclusion and Perspective

Bearing high catalytic activity, unique selectivity, and distinct catalytic mechanisms compared to the metal complexes and metal nanoparticles, the emerging metal nanoclusters have attracted widespread attention in catalysis. Challenges are always accompanied with opportunities. More research should be focused on developing synthetic methods for the large-scale construction of metal nanoclusters with both stable structures and high catalytic activity. Meanwhile, clear mechanism and mechanism-based structural evolution are crucial for purposely controlling the catalytic selectivity of metal nanoclusters. These efforts would collectively promote the development of metal nanocluster catalysis from laboratory to factory and realize their industrial applications.