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Although the use of reactive oxygen species (ROS) has been extensively studied, current systems employ external stimuli such as light or electrical energy to produce ROS, which limits their practical usage. In this report, biocompatible metals were used to construct a novel electrochemical system that can spontaneously generate H2O2 without any external light or voltage. The corrosion of Mg transfers electrons to Au-decorated oxidized Ti in an energetically favorable process, and the spontaneous generation of H2O2 in an oxygen reduction reaction was revealed to occur at titanium by combined spectroscopic and electrochemical analyses. The controlled release of H2O2 noticeably enhanced in vitro angiogenesis even in the absence of growth factors. Finally, a new titanium implant prototype was developed by Mg incorporation, and its potential for promoting angiogenesis was demonstrated.

Original publication

DOI

10.1002/anie.201507352

Type

Journal article

Journal

Angew chem int ed engl

Publication Date

01/12/2015

Volume

54

Pages

14753 - 14757

Keywords

angiogenesis, catalysis, corrosion, magnesium, oxygen reduction reaction, Angiogenesis Inducing Agents, Biocompatible Materials, Electrochemical Techniques, Hydrogen Peroxide, Magnesium, Oxidation-Reduction, Particle Size, Surface Properties, Titanium