Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 43, Pages 12622-12626Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201504707
Keywords
cobalt; electrocatalysis; heterogeneous catalysis; nanomaterials; solid-state NMR
Categories
Funding
- Ministry of Education
- POSTECH
- Center for Advanced Soft Electronics - Ministry of Science, ICT & Future Planning [CASE-2014M3A6A5060938]
- Basic Science Research Program through the National Research Foundation (NRF) of Korea [NRF-2013R1A1A2012960]
- Global Ph.D. Fellowship [NRF-2013H1A2A1032644]
- National Research Foundation of Korea - Ministry of Education [NRF-2013R1A1A2007910]
- National Research Foundation of Korea [2014M3A6A5060938, 2013H1A2A1032644, 2013R1A1A2007910, 2013R1A1A2012960, 2015M1A2A2056560] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Hybridization of organometallic complexes with graphene-based materials can give rise to enhanced catalytic performance. Understanding the chemical structures within hybrid materials is of primary importance. In this work, archetypical hybrid materials are synthesized by the reaction of an organometallic complex, [Co-II(acac)(2)] (acac=acetylacetonate), with N-doped graphene-based materials at room temperature. Experimental characterization of the hybrid materials and theoretical calculations reveal that the organometallic cobalt-containing species is coordinated to heterocyclic groups in N-doped graphene as well as to its parental acac ligands. The hybrid material shows high electrocatalytic activity for the oxygen reduction reaction (ORR) in alkaline media, and superior durability and methanol tolerance to a Pt/C catalyst. Based on the chemical structures and ORR experiments, the catalytically active species is identified as a Co-O-4-N structure.
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