Here we report a simple method to synthesize cobalt nanoparticles inside mesoporous nanorattle catalysts. In this method, zeolitic imidazolate framework ZIF-67 is used as structural template for the preparation of a mesoporous metal oxide shell as well as sacrificial precursor to form cobalt nanoparticles inside the shell. Furthermore, we demonstrate that the introduction of a carbonization step prior to the final calcination can decrease the required calcination temperature from 550 °C to 300 °C. This has a large effect on the dispersion and catalytic activity of Co3O4 for CO oxidation and decreases the light-of temperature (temperature at 50% conversion) from 160°C to 134°C. Exploiting metal-organic frameworks as both structural template and sacrificial precursor offers precise control of size, shape and structure and opens up new exiting opportunities for design of advanced nanostructured catalysts.
- Metal-organic frameworks
- Mesoporous materials
- Nanorattle catalysts
- CO oxidation
Zacho, S. L., Hyllested, J. Æ., Kasama, T., & Mielby, J. J. (2019). Controlling the dispersion of Co3O4 nanoparticles inside mesoporous nanorattle catalysts. Catalysis Communications, 125, 6-9. https://doi.org/10.1016/j.catcom.2019.02.020