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Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids

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Tiara-like Hexanuclear Nickel-Platinum Alloy Nanocluster.

Tomoshige Okada¹, Tokuhisa Kawawaki^1,2, Kana Takemae¹

¹Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.

The Journal of Physical Chemistry Letters

|February 1, 2024

Summary

Alloy tiara-like metal nanoclusters (TNCs) composed of nickel and platinum were synthesized. These alloy TNCs exhibit distorted structures, leading to reduced stability compared to single-metal TNCs.

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Area of Science:

Materials Science
Nanotechnology
Catalysis

Background:

Tiara-like metal nanoclusters (TNCs) are recognized for their stability, facile synthesis, and catalytic activity.
Alloying offers a route to tune nanocluster properties, yet studies on alloy TNCs remain limited.

Purpose of the Study:

To synthesize and characterize novel alloy TNCs incorporating nickel and platinum.
To investigate the impact of alloying on the stability, geometric, and electronic structures of TNCs.

Main Methods:

Synthesis of alloy TNCs with the formula [NiPt_6-(PET)₁₂] using 2-phenylethanethiolate (PET).
Evaluation of stability, geometric, and electronic properties using high-performance liquid chromatography and density functional theory (DFT) calculations.

Main Results:

Successful synthesis of nickel-platinum alloy TNCs.
DFT calculations indicated a distorted geometric structure for the alloy TNCs.
The alloy TNCs demonstrated lower stability compared to their single-metal counterparts.

Conclusions:

Alloying nickel and platinum in TNCs results in structural distortions.
The observed structural distortions negatively impact the stability of these alloy nanoclusters.