Carbon-Supported Platinum-Grafted Gold–Nickel Nanoclusters for Hydrogen Evolution Reaction

IF 5.5 3区材料科学 Q2 CHEMISTRY, PHYSICAL

ACS Applied Energy Materials Pub Date : 2025-09-11 DOI:10.1021/acsaem.5c01771

Lakshmi Kavalloor Murali, , , Kayalvizhi Anandhan, , , Subbiah Ravichandran, , , Edakkattuparambil Sidharth Shibu, , and , Jeyabharathi Chinnaiah*,

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Abstract

A carbon-supported platinum-grafted thiolate-protected precision AuNi nanocluster (NC) (Pt-AuNi/C) is studied for the hydrogen evolution reaction (HER) in acidic solution. The AuNi/C is doped with platinum through an electroless process. The HER performance is evaluated for AuNi/C and Pt-AuNi/C in a 0.1 M sulfuric acid solution. Typical HER behavior is noticed with the noticeable reduction in overpotential by ca. 208 mV_RHE @ 10 mA cm^–2 after platinum incorporation in the NCs. The HER curve on pristine NCs exhibits a contrasting steady-state limiting behavior, signaling a possible radial diffusion over the NCs. This result is expected for a random array-like arrangement of NCs, and this is witnessed as a changeover in steady-state limiting behavior to mass-transport free characteristics with increased proton concentration. However, the steady-state limiting behavior is obscured by the carbon support. Further, the Pt-AuNi/C is tested in a zero-gap cell, where cathodic current density of 2.3 A cm^–2 was measured at the overpotential of 0.5 V_RHE, which is much better than that of the benchmark Pt/C.

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碳负载铂接枝金镍纳米团簇的析氢反应

研究了碳载铂接枝硫代酸盐保护的精密AuNi纳米团簇（Pt-AuNi/C）在酸性溶液中的析氢反应。通过化学方法在AuNi/C中掺杂铂。在0.1 M硫酸溶液中对AuNi/C和Pt-AuNi/C的HER性能进行了评价。在nc中加入铂后，可以注意到典型的HER行为，过电位明显降低了约208 mVRHE @ 10 mA cm-2。原始nc上的HER曲线显示出对比的稳态极限行为，表明在nc上可能存在径向扩散。这一结果被认为是NCs随机排列的结果，并且随着质子浓度的增加，稳态限制行为转变为质量输运自由特征。然而，稳态极限行为被碳载体所掩盖。此外，Pt- auni /C在零间隙电池中进行了测试，在0.5 VRHE的过电位下测得2.3 a cm-2的阴极电流密度，远远优于基准Pt/C。

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来源期刊

ACS Applied Energy Materials Materials Science-Materials Chemistry

CiteScore

10.30

自引率

6.20%

发文量

1368

期刊介绍： ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.