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JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 133, Issue 4, Pages 762-764Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja109295x
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Recent advances in bioelectrochemistry came from the elaboration of conducting electrodes modified by an organic layer onto which nanoparticles are adsorbed. Self-assembled monolayers on noble-metal electrodes are known to hinder the electrochemical kinetics of fast-transfer redox systems. Surprisingly, fast kinetics are recovered when metal nanoparticles are deposited on top of the monolayer. We show that this surprising behavior can be fully accounted for when realizing that electron transfer from metal to metal is intrinsically easier than transfer between metal and redox system by many orders of magnitude.
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