Plasmonic Au Grid–CdSe Heteropatterned Film by Topochemistry and CdCl₂ Surface Passivation for Photoelectrochemical Hydrogen Evolution

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Constructing patterned film photoanodes with economizing raw chemicals but enhancing photoelectrochemical (PEC) performance is attractive for practical applications. However, simultaneously optimizing light scattering and interfacial charge transfer through plasmonic enhancement remains challenging. Herein, we developed a novel photoanode featuring Au grids nanometer-thick CdSe layer (Au grid-CdSe) well-organized heterointerfaces, fabricated via facile colloidal topochemical strategy. This design leverages the synergistic coupling between plasmons excitons in heteropatterned films. The underlying serve dual functions: as an electron collector reflector. Their highly ordered Bragg structure effectively scatters incident into ultrathin layer. Furthermore, CdCl2 surface passivation of Au(grid)-CdSe photoanode, based on this unique absorption/reflector architecture, yielded photocurrent density 4.51 mA cm-2, representing significant enhancement. Compared to similarly prepared Au-CdSe heterofilms, passivated films exhibited 2.0-fold higher PEC hydrogen evolution performance, maintained excellent stability over 26 h, reduced consumption by 32%. strategy offers pathway improving semiconductor-based optoelectronic devices.

Language: Английский

Photoelectrocatalytic Transformations of Waste into Value

Artificial photosynthesis., Journal Year: 2025, Volume and Issue: unknown

Published: May 7, 2025

Language: Английский