Controlling the distribution of supported nanoparticles by aqueous synthesis
ArticleEggenhuisen, T.M., Friedrich, H., Nudelman, F., Zecevic, J., Sommerdijk, N.A.J.M., Jongh, de, P.E. & Jong, de, K.P. (2013). Controlling the distribution of supported nanoparticles by aqueous synthesis. Chemistry of Materials, 25(6), 890-896. In Scopus Cited 24 times.
Synthesis of supported nanoparticles with controlled size and uniform distribution is a major challenge in nanoscience, in particular for applications in catalysis. Cryo-electron tomography revealed with nanometer resolution the 3D distribution of phases present during nanoparticle synthesis via impregnation, drying, and thermal treatment with transition metal salt precursors. By conventional methods a nonuniform salt distribution led to clustered metal oxide nanoparticles (NiO, Co3O4). In contrast, freeze-drying restricted solution mobility during drying and a more uniform nanoparticle distribution was obtained. By this fundamental insight into catalyst preparation, controlled synthesis of supported catalysts was achieved in a way that is also applicable for other nanostructured materials.