Electronic metal-support interaction boosts electrochemiluminescence by improving the catalytic activity of palladium

Abstract

The electronic metal-support interaction (EMSI) modulates the electronic structure and activity of catalysts, yet its role in electrochemiluminescence (ECL) remains unclear. Using graphene-supported Pd nanoparticles, we show that EMSI downshifts the Pd d-band center and that charge transfer between Pd and graphene facilitates both luminol oxidation and H₂O₂ decomposition, significantly enhancing the ECL signal.