纳米颗粒
材料科学
催化作用
纳米技术
水溶液
盐(化学)
纳米
化学工程
化学
有机化学
复合材料
工程类
作者
Tamara M. Eggenhuisen,Heiner Friedrich,Fabio Nudelman,Jovana Zečević,Nico A. J. M. Sommerdijk,Petra E. de Jongh,Krijn P. de Jong
摘要
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.
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