Ion-Gated Nanoconfinement in Bimetallic Nanorattles Unlocks Enhanced Plasmonic Nitrate Reduction Electrocatalysis.

ABSTRACT: Nanoconfinement is a powerful strategy to modulate local reaction environments in electrocatalysis, yet direct experimental validation of its impact on multi-electron transformations remains limited. Here, it is reported that hollow bimetallic Au@AgAu nanorattles serve as proof-of-concept tunable electrocatalysts for nitrate reduction (NO₃RR). By varying the porosity of Ag-based shells via controlled galvanic replacement, architectures are constructed in which electric double layer thickness, and thus pore accessibility, can be dynamically modulated and quantified by electrolyte concentration. With increasing ionic strength, a marked enhancement in NO₃RR activity is observed, with nanorattles delivering three to fourfold higher mass-specific currents than solid Au@Ag

SUBMITTER: da Silva FG 

PROVIDER: S-EPMC12571211 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature