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Coordination Chemistry of [Co(acac) 2 ] with N‐Doped Graphene: Implications for Oxygen Reduction Reaction Reactivity of Organometallic Co‐O 4 ‐N Species
Author(s) -
Han Jongwoo,
Sa Young Jin,
Shim Yeonjun,
Choi Min,
Park Noejung,
Joo Sang Hoon,
Park Sungjin
Publication year - 2015
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201504707
Subject(s) - catalysis , graphene , organometallic chemistry , reactivity (psychology) , methanol , chemistry , cobalt , group 2 organometallic chemistry , oxygen reduction reaction , hybrid material , inorganic chemistry , molecule , materials science , organic chemistry , nanotechnology , electrochemistry , medicine , alternative medicine , electrode , pathology
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.