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Park, Noejung
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Coordination chemistry of [Co(acac)2] with N-doped graphene: Implications for oxygen reduction reaction reactivity of organometallic Co-O4-N species

Author(s)
Han, JongwooSa, Young JinShim, YeonjunChoi, MinPark, NoejungJoo, Sang HoonPark, Sungjin
Issued Date
2015-10
DOI
10.1002/anie.201504707
URI
https://scholarworks.unist.ac.kr/handle/201301/17693
Fulltext
http://onlinelibrary.wiley.com/doi/10.1002/anie.201504707/abstract
Citation
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.54, no.43, pp.12622 - 12626
Abstract
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.
Publisher
WILEY-V C H VERLAG GMBH
ISSN
1433-7851
Keyword (Author)
electrocatalysisheterogeneous catalysisnanomaterialssolid-state NMRcobalt
Keyword
HIGH-PERFORMANCE ELECTROCATALYSTSFUEL-CELLSCATALYSTSCOBALTCARBONGENERATIONIRONPOLYMERIZATIONCOMPOSITEOXIDE

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