Atomic scale materials have drawn much attention due to their unique physical and chemical properties derived from quantum effect. However, the generation of stable and fine-tuned atomic scale material is still challenging. So, developing a novel material to prevent agglomeration and limit the reaction site for precise tuning is a key approach to realizing the demands. Metal-organic frameworks (MOFs) is the best candidate for meeting the requirements because it not only stabilizes atomic scale materials in its pore but also becomes a good atomic precursor in itself. We have found a solution from biological phenomena and it was a good starting point for planning a strategy to take advantage of MOFs. It had been a challenge for quite a long time to pass DNA into the cell membrane for DNA cloning since negative charge causes electrostatic repulsion between DNA and cell membrane to push each other. A recently developed amphiphilic lipid-mediated DNA transfection method was able to solve by controlling of hydrophilicity. Here, we proposed a novel strategy to transfer hydrophilic molecules into hydrophobic materials, inspired by lipid-mediated DNA transfection. This allows stable atomic-scale Co(OH)2 trapped in pore of MOFs and it can be utilized as electrode materials for O2-battery. The electrochemical performance indicates that atomically embedded Co(OH)2 in multi-shell hollow MOFs show higher activity and stability for O2-battery. In conclusion, MOFs was used as an atomically dispersed precursor for fine-tuned Co(OH)2 and as a template for multi-shell hollow MOFs structures, which are solid supports to prevent agglomeration.

Multi-shell metal-organic frameworks by fine-tuned hydrophilicity for O2-battery

2019 Spring National Meeting

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