Enhancing Electrogenerated Chemiluminescence on Platinum Electrodes through Surface Modification

Fiorani, A. and Eßmann, V. and Santos, C.S. and Schuhmann, W.

Volume: 7 Pages: 1256-1260
DOI: 10.1002/celc.202000103
Published: 2020

Increasing the light emission of electrogenerated chemiluminescence is an important goal for enhancing the sensitivity for potential practical applications. Electrogenerated chemiluminescence is primarily triggered by a heterogeneous electron transfer reaction, for which the electrode material plays a pivotal role. We investigated how a platinum electrode, one of the most used but poorly efficient noble metal electrode materials in electrogenerated chemiluminescence, can be modified to enhance light emission. A polypyrrole layer was deposited on the platinum electrode through electrochemically induced polymerization, and subsequently pyrolyzed with the formation of a carbonaceous film. Electrochemiluminescence of the [Ru(bpy)3]2+/tri-n-propylamine system on such carbon film electrodes showed an enhancement of up to a 4 times increase, as compared with the bare platinum electrode. © 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

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