화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.79, 409-417, November, 2019
DOI10.1016/j.jiec.2019.07.015  Export Citation
Lead ruthenate nanocrystals on reduced graphene oxides as an efficient bifunctional catalyst for metal.air batteries
Subin Na1, 2, Boeun Lee1, Woo Young Yoon2, Taeeun Yim3, †, and Si Hyoung Oh1, 4, †
  • 1Center for Energy Storage Research, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
  • 2Department of Materials Science and Engineering, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 136-791, Republic of Korea
  • 3Department of Chemistry, Research Institute of Basic Sciences, College of Natural Science, Incheon National University, 119, Academy-ro, Yeonsu-gu, Incheon, 22012, Republic of Korea
  • 4Division of Energy and Environment Technology, KIST School, Korea University of Science and Technology, Seoul, Republic of Korea
E-mail:,
A composite consisting of lead ruthenate nanocrystals with an expanded pyrochlore structure on reduced graphene oxide nano-sheets, is reported as an efficient bifunctional catalyst for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). Comparative studies for ORR show that the composite produces highly positive synergic coupling effects, strengthening a four-electron catalytic route, i.e., more positive onset potential, higher limiting current density, much smaller Tafel slope, and more durable catalytic performance after thousands of voltammetric cycling than pristine material. The composite also functions as an excellent and durable OER catalyst, exceeding the performance of NiCo2O4 and RuO2.
Keywords:Rechargeable metal-air batteries;Bifunctional catalyst;Expanded pyrochlore;Reduced graphene oxide;Composite
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