Synthesis of Small-sized Trisoctahedral Gold Nanoparticles with High Catalytic Activity for Methanol Electrooxidation

doi:10.1007/s40242-025-5003-2

高等学校化学研究 ›› 2025, Vol. 41 ›› Issue (4): 903-909.doi: 10.1007/s40242-025-5003-2

Synthesis of Small-sized Trisoctahedral Gold Nanoparticles with High Catalytic Activity for Methanol Electrooxidation

KONG Li, HAO Mengjiao LI Longwei

State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, P. R. China

收稿日期:2025-01-03 接受日期:2025-05-08 出版日期:2025-08-01 发布日期:2025-07-24
通讯作者: KONG Li,kongli@sdu.edu.cn E-mail:kongli@sdu.edu.cn
基金资助:
This work was supported by the Laboratory Construction and Management Research Project of Shandong University, China (No. sy20213206).

Synthesis of Small-sized Trisoctahedral Gold Nanoparticles with High Catalytic Activity for Methanol Electrooxidation

KONG Li, HAO Mengjiao LI Longwei

State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan 250100, P. R. China

Received:2025-01-03 Accepted:2025-05-08 Online:2025-08-01 Published:2025-07-24
Supported by:
This work was supported by the Laboratory Construction and Management Research Project of Shandong University, China (No. sy20213206).

摘要/Abstract

摘要： In this study, we successfully synthesized trisoctahedral gold nanoparticles (TOH-Au NPs) with an average size of 45 nm along the longest axis using a seeded growth method. To the best of our knowledge, this represents the smallest reported size for TOH-Au NPs with {331} facet to date. By modulating the seed amount, we achieved precise size control, increasing the average particle size from 45 nm to 80 nm, accompanied by a corresponding red shift in plasmon resonances. Structural characterization via projection angle measurements confirmed that the synthesized TOH-Au NPs are enclosed by high-index {331} facets. These facets exhibit a high density of low-coordination sites, including step and kink atoms, which contribute to their exceptional electrocatalytic performance. Notably, the 45 nm TOH-Au NPs demonstrated the highest electrocatalytic activity, with an electrochemically active surface area (ECSA) of 1.239 m²/g, a mass-specific activity of 2.297 A/g, and an area-specific activity of 0.185 mA/cm². This work not only establishes a robust method for the controlled synthesis of Au NPs but also highlights their potential as highly efficient catalysts for electrochemical applications.

关键词: Gold, Nanoparticle, Seeded growth, High-index facet, Electrocatalysis

Abstract: In this study, we successfully synthesized trisoctahedral gold nanoparticles (TOH-Au NPs) with an average size of 45 nm along the longest axis using a seeded growth method. To the best of our knowledge, this represents the smallest reported size for TOH-Au NPs with {331} facet to date. By modulating the seed amount, we achieved precise size control, increasing the average particle size from 45 nm to 80 nm, accompanied by a corresponding red shift in plasmon resonances. Structural characterization via projection angle measurements confirmed that the synthesized TOH-Au NPs are enclosed by high-index {331} facets. These facets exhibit a high density of low-coordination sites, including step and kink atoms, which contribute to their exceptional electrocatalytic performance. Notably, the 45 nm TOH-Au NPs demonstrated the highest electrocatalytic activity, with an electrochemically active surface area (ECSA) of 1.239 m²/g, a mass-specific activity of 2.297 A/g, and an area-specific activity of 0.185 mA/cm². This work not only establishes a robust method for the controlled synthesis of Au NPs but also highlights their potential as highly efficient catalysts for electrochemical applications.

Key words: Gold, Nanoparticle, Seeded growth, High-index facet, Electrocatalysis

KONG Li, HAO Mengjiao LI Longwei. Synthesis of Small-sized Trisoctahedral Gold Nanoparticles with High Catalytic Activity for Methanol Electrooxidation[J]. 高等学校化学研究, 2025, 41(4): 903-909.

KONG Li, HAO Mengjiao LI Longwei. Synthesis of Small-sized Trisoctahedral Gold Nanoparticles with High Catalytic Activity for Methanol Electrooxidation[J]. Chemical Research in Chinese Universities, 2025, 41(4): 903-909.

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Synthesis of Small-sized Trisoctahedral Gold Nanoparticles with High Catalytic Activity for Methanol Electrooxidation

Synthesis of Small-sized Trisoctahedral Gold Nanoparticles with High Catalytic Activity for Methanol Electrooxidation

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