| 초록 |
Zeolitic imidazolate framework-67 (ZIF-67) can be converted to metallic Co nanoparticles (NPs) supported on N-doped carbon (Co/NC) through reduction under 4% H2 condition. However, the extremely high surface area and ordered pore structure of ZIF-67 disappear after high-temperature (>500 oC) reduction. Aggregated CoOx NPs reduce the number of active sites, reducing catalytic activity. If the original ZIF-67 structure is maintained after reduction, promoting the uniform distribution of active sites on the NC, the catalytic performance can be improved. Herein, the correlation between the catalytic furfural hydrogenation performance, Co/NC morphology, and oxidation state of Co was investigated as a function of the H2 reduction temperature and time. When ZIF-67 was reduced at 400 oC for 6 h, the catalyst exhibits the highest activity, promoting selectivity to 2-methylfuran. |
