Enhanced Electrochemiluminescence by Knocking Out Gold Active Sites.

ABSTRACT: Electrochemiluminescence (ECL) of the conventional system of [Ru(bpy)₃]²⁺ luminophore and amine-based coreactants is particularly inefficient on noble metal electrodes. This is due to the formation of a passivating oxide layer on the metal surface inhibiting the electro-oxidation of amines like tri-n-propylamine (TPrA) coreactant. Herein, we demonstrated the enhancement of ECL emission on gold surface by hydroxyl radicals attack that are chemically generated with Cu-Fenton reagent. These radicals selectively deactivate the gold active sites and knockout the metal surface asperities that counterintuitively led to an amplification of the ECL emission. Atomic force microscopy shows a massive smoothening of the surface. The electrochemical characterization proves that the

SUBMITTER: Leka Kottaiveedu Sivakumar I 

PROVIDER: S-EPMC11878343 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature