| 초록 |
Plasmonic metal nanoparticles absorb light energy and release the energy through radiative or non-radiative relaxation. Surface catalytic reaction would take advantage of the non-radiative energy relaxation of plasmon with enhanced activity. Herein, we demonstrated plasmon aided ethanol dehydrogenation using Ag-Ni binary nanoparticles with different shapes, snowman and core-shell, as plasmonic catalysts. The surface plasmon formed in the Ag enhanced the surface catalytic reaction that occurred at the Ni, and the shape of the nanoparticles affected the enhancements. The absorbed light energy was transferred to the Ni by the surface plasmon through the non-radiative hot electron. Finally, the activation energy was greatly reduced, from 41.6 kJ/mol for the Ni catalyst to 22.3 kJ/mol for the snowman shaped nanoparticles. These findings can be helpful in designing effective plasmonic catalysts for other thermally driven surface reactions. |
