Nanoparticles, uses thereof, and method for producing metallic nanoparticles

By optimizing the distribution and composition of Pt on gold nanoparticles with ultra-low Pt deposition, the challenges of catalytic selectivity and efficiency in plasmonic catalysis are addressed, achieving significant enhancements in hydrogen evolution reaction performance and efficient Pt utilization.

WO2024261405A1PCT designated stage expired Publication Date: 2024-12-26UNIVERSITY OF HELSINKI
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Patent Information

Application Number
PCT/FI2024/050339
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-06-21
Filing Date
2024-06-20
Publication Date
2024-12-26

AI Technical Summary

Technical Problem

Current plasmonic catalysis systems face challenges in controlling catalytic selectivity and improving catalytic efficiency, particularly with antenna-reactor nanoparticles where the deposition of catalytic metals like platinum (Pt) at the surface of plasmonic components leads to decreased absorption and plasmonic properties, limiting their effectiveness in reactions such as hydrogen evolution.

Method used

The development of nanoparticles with ultra-low Pt deposition on a gold (Au) surface, where Pt is enriched in a thin surface layer, optimizing the distribution and composition to enhance plasmonic and catalytic properties, allowing for improved light absorption and energy dissipation for enhanced hydrogen evolution reaction performance.

Benefits of technology

This approach results in an eight-fold improvement in photocatalytic performance and a six-fold improvement in electrocatalytic performance for hydrogen evolution reactions compared to pure Pt nanoparticles, while efficiently utilizing the rare and expensive metal Pt, and maintaining the plasmonic properties of Au.

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Abstract

In the present invention, there is provided a nanoparticle comprising a plasmonic metal and a catalytic metal, characterized in that: the plasmonic metal and the catalytic metal are both present at the surface of the nanoparticle; wherein the nanoparticle comprises 0.1 wt% - 5 wt% of said catalytic metal; and wherein said catalytic metal is capable of catalysing a hydrogen evolution reaction. The present invention is also directed to the preparation method and uses of said nanoparticle.
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Citation Information

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