Plasmon-Enhanced CO₂ Methanation over Au@Ru/TiO₂ via Nanoscale Control of Ru Shell Thickness.

ABSTRACT: Plasmonic-catalytic nanostructures enable coupling light harvesting with chemical transformations, yet their performance critically depends on nanoscale architecture and metal-support interactions. Here, we synthesize Au@Ru core-shell nanoparticles with tunable Ru coverage and immobilize them on TiO₂ to create hybrid catalysts for CO₂ methanation. By controlling Ru shell thickness, we identifyAu₆₀Ru₄₀/TiO₂, featuring a thin, discontinuous shell (∼2 nm Ru nanocrystallites), as the most active composition. This catalyst combines abundant Ru active sites with preservation of the Au core's localized surface plasmon resonance (LSPR). Under 545 nm illumination, it shows a 335% rate enhancement over dark conditions at 190 °C, outperforming co

SUBMITTER: Rathmann F 

PROVIDER: S-EPMC12723468 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature