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[References: 34 tit.]

Artificial enzymatic mimics based on nanoparticles have become a powerful tool for the improvement of analytical performance in the detection of important bioactive compounds. For the first time the intrinsic peroxidase-like activity of Fe-core/carbon shell nanoparticles was studied. The catalytic process was described by a typical Michaelis-Menten curve for enzyme kinetics, and the results were comparable with those previously published. The high catalytic performance of the allows the development of a new simple procedure for glucose determination with a low detection limit of 0.21 mu M. To our knowledge, this is the first study showing the ability to generate active oxygen species on the surfaces. We suppose that our investigation will open up a new direction in medicinal applications using these promising materials.