Na, Subin Lee, Boeun Yoon, Woo Young Yim, Taeeun Oh, Si Hyoung 2024-01-19T19:01:01Z 2024-01-19T19:01:01Z 2021-09-05 2019-11 1226-086X https://pubs.kist.re.kr/handle/201004/119379 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. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved. English 한국공업화학회 Lead ruthenate nanocrystals on reduced graphene oxides as an efficient bifunctional catalyst for metal-air batteries Article 10.1016/j.jiec.2019.07.015 1 Journal of Industrial and Engineering Chemistry, v.79, pp.409 - 417 Journal of Industrial and Engineering Chemistry 79 409 417 N scie scopus kci ART002523684 000488135500042 2-s2.0-85069736595 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article OXYGEN REDUCTION REACTION ELECTROCATALYSTS PYROCHLORES ROUTE NANOPARTICLES PB2RU2O6.5 NANOSHEETS STABILITY CAPACITY Rechargeable metal air batteries Bifunctional catalyst Expanded pyrochlore Reduced graphene oxide Composite