| 초록 |
Rising emissions of CO2 in the atmosphere have become an increasing concern. Therefore, there are many studies including CO2 storage and conversion. Among various apporoaches regarding CO2 conversion, electro-reduction has high energy efficiency up to 100% in laboratory scale. Since CO2 conversion mechanism still remains unclear, it's required to figure out what parameters afftect the conversion selectivity. Herein, we fabricated nano-ripple structure via methane pretreatment during the graphene growth which has many step sites. The nanoripple morphology has periodical slope structure with 290nm width and 16nm depth. Compared to Cu foil, ripple Cu showed high C2 product selectivity while H2 production was suppressed. Moreover, ethylene glycol was generated upto 49%(Faradaic efficiency) at -0.8V (vs. RHE) which was rarely produced by CO2 electro-conversion. |
