Carbon-encapsulated Ni catalysts are synthesized by an electrical explosion of wires (EEW) method and applied for CO2 methanation. We find that the presence of carbon shell on Ni nanoparticles as catalyst can positively affect CO2 methanation reaction. Ni@5C that is produced under 5% CH4 partial pressure in Ar gas has highest conversions of 68 % at 350 oC and 70% at 400 oC, which are 73 and 75% of the thermodynamic equilibrium conversion, respectively. The catalyst of Ni@10C with thicker carbon layer shows much reduced activity. The EEW-produced Ni catalysts with low specific surface area outperform Ni catalysts with high surface area synthesized by solution-based precipitation methods. Our finding in this study shows the possibility of utilizing carbon-encapsulated metal catalysts for heterogeneous catalysis reaction including CO2 methanation. Furthermore, EEW, which is a highly promising method for massive production of metal nanoparticles, can be applied for various catalysis system, requiring scaled-up synthesis of catalysts.

Abstract
1.서 론
2. 실험 방법
    2.1. Ni 촉매의 합성
    2.2. 촉매의 특성 분석
    2.3. 촉매의 반응성 테스트
3. 결과 및 고찰
4.결 론
References

• 김혜정(충남대학교 에너지과학기술대학원) | Hye Jeong Kim (Graduate School of Energy Science and Technology, Chungnam National University)
• 김승보(충남대학교 에너지과학기술대학원) | Seung Bo Kim (Graduate School of Energy Science and Technology, Chungnam National University)
• 김동현(충남대학교 에너지과학기술대학원) | Dong Hyun Kim (Graduate School of Energy Science and Technology, Chungnam National University)
• 윤재랑(충남대학교 에너지과학기술대학원/한국에너지기술연구원 에너지자원순환연구실) | Jae-Rang Youn (Graduate School of Energy Science and Technology, Chungnam National University/Energy Resources Upcycling Research Laboratory, Korea Institute of Energy Research)
• 김민재(한국에너지기술연구원 에너지자원순환연구실) | Min-Jae Kim (Energy Resources Upcycling Research Laboratory, Korea Institute of Energy Research)
• 전상구(한국에너지기술연구원 에너지자원순환연구실) | Sang Goo Jeon (Energy Resources Upcycling Research Laboratory, Korea Institute of Energy Research)
• 이경자(한국원자력연구원 스마트안전진단연구부) | Gyoung-Ja Lee (Smart Structural Safety and Prognosis Research Division, Korea Atomic Energy Research Institute) Corresponding author
• 이규복(충남대학교 에너지과학기술대학원) | Kyubock Lee (Graduate School of Energy Science and Technology, Chungnam National University) Corresponding author