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Flügel, Erik A.; Lau, Vincent W.-H.; Schlomberg, Hendrik; Glaum, Robert; Lotsch, Bettina V. (2016): Homonuclear Mixed-Valent Cobalt Imidazolate Framework for Oxygen-Evolution Electrocatalysis. In: Chemistry-A European Journal, Vol. 22, No. 11: pp. 3676-3680
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Herein, the synthesis and characterization of the first mixed-valent, purely cobalt-based zeolitic imidazolate framework, (Co3Co2III)-Co-II(C3H3N2)(12) is presented. The material adopts the cubic garnet-type structure and combines high thermal stability of up to 350 degrees C with excellent chemical stability. Electrochemical characterization showed that the cobalt centres are redox active and efficiently support oxygen evolution, thus rendering this framework a potential candidate for single-site heterogeneous catalysis based on earth-abundant elements.