The impact of ligand chain length on the HER performance of atomically precise Pt6(SR)12 nanoclusters

IF 5.8 3区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nanoscale Pub Date : 2024-12-03 DOI:10.1039/d4nr03316g

Lipipuspa Sahoo, Supriti Dutta, Aarti Devi, Rashi, Swapan K. Pati, Amitava Patra

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Abstract

Atomically precise metal cluster-based electrocatalysts have been paid significant attention for an efficient hydrogen evolution reaction (HER). Herein, we have synthesized atomically precise Pt₆(SR)₁₂ nanoclusters using 3-mercaptopropionic acid (MPA), 6-mercaptohexanoic acid (MHA), 8-mercaptooctanoic acid (MOA), and 11-mercaptoundecanoic acid (MUA) thiol ligands in aqueous media at room temperature to understand the impact of ligand chain length on the HER performance. The composition of Pt₆(SR)₁₂ metal clusters was confirmed by matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry. Electrochemical studies confirmed that the HER performance of Pt₆(SR)₁₂ NCs is notably affected by the ligand chain length, and Pt₆(MPA)₁₂ exhibits an overpotential of 19 mV at a current density of 10 mA cm⁻², which is several-fold higher than the Pt NCs developed in the recent past. The interfacial charge transfer kinetics and the HER performance decrease with the increase in the chain length of the thiol ligands. Density functional theory calculations showed that the Gibbs free energy for hydrogen adsorption decreases with decreasing chain length of the thiol ligand. The ligands used to synthesize Precise metal clusters for electrocatalysis play an essential role in their efficiency.

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来源期刊

Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

12.10

自引率

3.00%

发文量

1628

审稿时长

1.6 months

期刊介绍： Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.