Ranjan A.K.Jha P.K.Jha P.A.Singh P.2025-01-132025-01-132024218979https://dl.bhu.ac.in/ir/handle/123456789/1963Plasmonic catalysis triggers the dissociation of H 2 or adsorbed O 2 (sluggish processes) under continuous wave excitation via plasmon decay. This is coupled to interband or intraband excitation of d-band or sp-band, respectively, to levels above fermi level of metals. Here, we have studied the plasmonic and photocatalytic behavior in an environment friendly medium with AM 1.5 G sunlight of CuO/ Cu 2 O thin films fabricated by pulsed laser deposition technique in vacuum with varying thickness. We have achieved ? 0.59 kmol h ? 1 g ? 1 H 2 production in the CuO/ Cu 2 O film with a thickness of ? 27 nm. The role of plasmons with metal-dielectric and semiconductor-semiconductor interfaces is conducted through both experimental and theoretical approaches. The results suggest that the impact of plasmonic catalysis/synthesis is subject to the dimension, composition, and band alignment of two interface materials. � 2024 Author(s).enArticle10.1063/5.0188802