Gold and gold‑platinum clusters as nanocatalysts for conversion of hydrogen peroxide

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL Journal of Electroanalytical Chemistry Pub Date : 2025-02-21 DOI:10.1016/j.jelechem.2025.119009

Konstanty Zdunek, Agnieszka Więckowska

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Abstract

The electrocatalytic properties of Au₂₄Pt(SR)₁₈ (shortly: Au₂₄Pt) clusters protected by n-butanethiol C₄H₉SH haven't been characterized in detail yet. The platinum atom, surrounded by delocalized electrons in the gold core Au₁₂Pt, exhibits different behaviour compared to atoms in pure platinum nanoparticles. In this study we confirm this phenomenon by demonstrating a strong electrocatalytic effect for the electrooxidation and electroreduction of hydrogen peroxide using a gold working electrode modified with a Nafion-suspended product containing Au₂₄Pt clusters (Nafion – perfluorosulfonic copolymer). The currents measured at constant potentials of ±0.5 V versus an Ag/AgCl reference electrode, and hydrogen peroxide molarities ranging from 1 to 10 mM, show a linear dependence with a high correlation coefficient of up to 0.999. Due to the durability of the modified electrodes in water-based solutions and the reproducibility of the results, this technique appears promising for detecting the hydrogen peroxide in biological samples without damaging the sample, provided it remains stable within the specified potential range.

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金和金铂团簇作为过氧化氢转化的纳米催化剂

正丁硫醇C4H9SH保护的Au24Pt(SR)18（简称：Au24Pt）簇的电催化性能尚未得到详细的表征。与纯铂纳米粒子中的原子相比，在金核Au12Pt中被离域电子包围的铂原子表现出不同的行为。在这项研究中，我们证实了这一现象，通过使用含有Au24Pt簇（Nafion -全氟磺酸共聚物）的Nafion悬浮物修饰的金工作电极对过氧化氢的电氧化和电还原具有很强的电催化作用。在±0.5 V恒定电位下，在Ag/AgCl参比电极上测量到的电流和过氧化氢的摩尔浓度在1 ~ 10 mM范围内呈线性关系，相关系数高达0.999。由于改性电极在水基溶液中的耐久性和结果的可重复性，该技术似乎有希望检测生物样品中的过氧化氢而不损坏样品，只要它在规定的电位范围内保持稳定。

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.