| 학회 | 한국재료학회 |
| 학술대회 | 2019년 가을 (10/30 ~ 11/01, 삼척 쏠비치 호텔&리조트) |
| 권호 | 25권 2호 |
| 발표분야 | C. 에너지 재료 분과 |
| 제목 | Enhanced methane production on isolated Cu nanoparticles in electrochemical CO2 reduction via metal-organic framework template |
| 초록 | Conversion of CO2 to useful chemicals is a potential solution to resolve current climate crisis. For the practical application of this technique, various catalyst materials that can efficiently produce the fuel and desired chemicals have been explored. Among the carbon dioxide reduction reaction (CO2RR) products, Methane which is the main components of natural gas, is used in high abundance and its usefulness has recently been re-highlighted since methane could be efficiently recycled from CO2 and used within the current energy infrastructure. In the renewable energy industries, methane is also considered a potential solar fuel especially since it could be stored and manipulated more conveniently than H2. To selective production of methane, Copper (Cu) has been vastly studied since, as an electrocatalyst for its ability to produce various forms of hydrocarbons during the CO2RR. However, Cu nanoparticles (NPs) tend to easily agglomerate, and a high loading of Cu NPs often leads to an undesired enhancement in Faradaic efficiency (FE) for C2 and C3 products due to enhanced C-C coupling reactions. Therefore, a synthetic strategy to fabricate Cu-based electrocatalysts that are not only nano-sized but also sufficiently isolated is required to promote CH4 production on Cu. In this study, a facile metal-organic framework (MOF)-mediated strategy to obtain an efficient electrocatalyst for the synthesis of CH4 is suggested. Cu-based MOF-74 was chosen not only as the precursor of Cu NPs clusters but also its low-dimensional structure which was electrochemically reduced to obtain highly isolated Cu NPs to achieve enhanced CH4 production during CO2RR. The porous structure of the MOF serves as a template for the synthesis of isolated Cu NP clusters with high catalytic activities and high efficiencies for the CH4 production in the electrochemical CO2RR. The MOF-derived Cu NPs were found to be less aggregated and demonstrated enhanced electrocatalytic performance with high activity and selectivity for C1 products. The high selectivity towards the CH4 formation could be attributed to the suppression of C-C coupling due to the isolated Cu NPs clusters. |
| 저자 | 김문경, 김혁주, 정형모 |
| 소속 | 강원대 |
| 키워드 | Metal-organic framework; Electrocatalyst; CO<SUB>2</SUB> reduction |
