Size, Shape, and Composition Control of Metallic Colloidal Nanoparticles for the Design of Heterogeneous Catalysts

Abstract Metal‐supported catalysts play a pivotal role in various industrial processes, yet conventional preparation methods such as impregnation or coprecipitation lack precision in controlling critical parameters like particle size, morphology, and composition. Colloidal synthesis proved to be an excellent route for the rational adjustment of these parameters, allowing to establish structure‐performance correlations for smart catalyst design. This review explores the common strategies employed for the fine tuning of size, shape, and composition of colloidal nanoparticles used as heterogeneous catalysts. Since the colloidal route involves the use of stabilizing agents, different strategies for their removal are discussed together with insights into their effects in catalysis. Furthermore, common strategies for the deposition of preformed nanoparticles are presented. In addition, the modifications in geometric and electronic properties and their impact on the catalytic properties are described. To conclude, current applications, challenges, and future perspectives of metal‐supported nanoparticles as heterogenous catalysts are discussed.