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2021 Vol.31, Issue 9 Preview Page
Carbon-Encapsulated Ni Catalysts for CO2 Methanation

탄소층으로 캡슐화된 Ni나노입자 촉매의 CO2 메탄화 반응

Hye Jeong Kim1*
,
Seung Bo Kim1*
,
Dong Hyun Kim1
,
Jae-Rang Youn12
,
Min-Jae Kim2
,
Sang Goo Jeon2
,
Gyoung-Ja Lee3†
,
Kyubock Lee1†
김 혜정1*
,
김 승보1*
,
김 동현1
,
윤 재랑12
,
김 민재2
,
전 상구2
,
이 경자3†
,
이 규복1†
1Graduate School of Energy Science and Technology, Chungnam National University, Daejeon 34134, Republic of Korea
2Energy Resources Upcycling Research Laboratory, Korea Institute of Energy Research, Daejeon 34129, Republic of Korea
3Smart Structural Safety and Prognosis Research Division, Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
1충남대학교 에너지과학기술대학원
2한국에너지기술연구원 에너지자원순환연구실
3한국원자력연구원 스마트안전진단연구부
†Corresponding author E-Mail : kyubock.lee@cnu.ac.kr (K. Lee, Chungnam Nat'l Univ.)
Corresponding Authorleegj@kaeri.re.kr (G. -J. Lee, KAERI)
September 2021. pp. 525-531
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Abstract

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 °C and 70% at 400 °C, 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.

Keywords
electrical explosion of wires
CO2 methanation
core-shell
catalyst
metal nanoparticle
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 31
  • No :9
  • Pages :525-531
  • Received Date : 2021-08-13
  • Revised Date : 2021-09-06
  • Accepted Date : 2021-09-07
  • DOI :https://doi.org/10.3740/MRSK.2021.31.9.525
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