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Updated: Jun 16, 2025
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Preparation of Silver-Palladium Alloyed Nanoparticles for Plasmonic Catalysis under Visible-Light Illumination
Published on: August 18, 2020
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Au@AuPd Core-Alloyed Shell Nanoparticles for Enhanced Electrocatalytic Activity and Selectivity under Visible Light
Kaline N da Silva1, Shwetha Shetty1, Sam Sullivan Allsop2
1Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, PO Box 55, FIN-0014 Helsinki, Finland.
ACS Nano
|August 20, 2024
Summary
This study introduces novel gold-palladium alloy nanoparticles for plasmonic catalysis. These engineered nanoparticles enhance reaction rates and selectivity under visible light, offering a sustainable approach to molecular transformations.
Area of Science:
- Materials Science
- Catalysis
- Nanotechnology
Background:
- Plasmonic catalysis uses nanoparticles' localized surface plasmon resonance (LSPR) to boost reactions under visible light.
- Controlling reaction selectivity remains a challenge in plasmonic catalysis.
- Integrating catalytic materials often reduces optical absorption in antenna-reactor nanoparticles.
Purpose of the Study:
- To synthesize bimetallic core@shell gold@gold-palladium (Au@AuPd) nanoparticles with ultralow palladium (Pd) content.
- To achieve an optimized dilute alloyed shell for enhanced catalytic performance.
- To investigate the impact of Pd distribution on catalytic activity and selectivity.
Main Methods:
- Synthesis of Au@AuPd core@shell nanoparticles with approximately 10 atom % Pd.
- Utilizing the (photo)electrocatalytic nitrite reduction reaction (NO2RR) as a model system.
- Combining experimental analysis with theoretical modeling.
Main Results:
- The designed Au@AuPd NPs exhibited enhanced catalytic activity and selectivity for NO2RR under visible light.
- Optimized Pd distribution in the alloyed shell improved interaction with adsorbed species.
- Improved performance was observed both with and without light illumination.
Conclusions:
- The study demonstrates a successful strategy for designing antenna-reactor plasmonic-catalytic nanoparticles.
- Controlled Pd loading and distribution are key to enhancing activity and selectivity.
- This approach offers insights for developing sustainable catalysts for molecular transformations.
Keywords:
Au@AuPd core−shellbimetallic nanoparticlesnitrite reduction reaction (NO2RR)plasmonic electrocatalysisselectivityultralow loadingvisible light irradiationMore Related Videos
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