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Figure 6
(a) First-shell EXAFS data fitting during the thermal decomposition of Co oxalate with the first Co—O scattering path of Co oxalate and at the end of the experiment the first Co—Co path of the formed metallic cobalt. Coordination numbers and atomic distance values are plotted as a function of reaction time as well as the applied temperature ramp. The removal of two oxygen neighbours and the decrease of the distance between the remaining oxygen neighbours and the central Co atom is clearly recognizable at about 1100 s (453 K) owing to dehydration. The Co metal at the end of the reaction evolves linearly, and pure Co is obtained before the final temperature is reached. (b) Exemplary EXAFS fits from which the results in (a) were derived.

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