Boosting the Electrochemical Hydrogen Evolution Activity by In Situ Decoration of Ag Nanoparticles over Few Layered MoS2 Nanosheets

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-02-26 DOI:10.1007/s10562-025-04957-2

Akshaya Pisal Deshmukh, Reshma Bhosale, Tejashree Bhave

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Abstract

In this work we have synthesized few layered MoS₂ nanosheets and to boost the electrochemical hydrogen evolution reaction (HER) over as an electrocatalyst, in situ Ag nanoparticles are loaded uniformly on the sheets by using simple and one pot method of hydrothermal synthesis. The overpotential drop recorded in Ag/MoS₂ is almost double as compared to pristine MoS₂ which indicates that decoration of Ag has lowered the barrier energy of the HER reaction and increased the efficiency of catalyst. In turn, layered structure of MoS₂ provided the matrix for uniform loading of Ag nanoparticles. More importantly, lower Tafel value (74 mV/dec), lower charge transfer resistance and increased electric double layer capacitance in 10 wt% Ag/MoS₂ clearly implies the enhanced HER performance as well as robust stability owing to improved interface between Ag and MoS₂ along with increased exposed active sites. Therefore, this work explicitly focuses on the study of in situ loading of Ag over MoS₂ which provided more accessibility to the active sites to elevate the HER activity.

Graphical Abstract

Abstract Image

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多层二硫化钼纳米片上原位修饰银纳米粒子提高电化学析氢活性

本文采用简单的一锅水热合成法，将原位银纳米颗粒均匀负载于二硫化钼纳米片上，以促进二硫化钼纳米片的电化学析氢反应。Ag/MoS2的过电位下降几乎是原始MoS2的两倍，这表明Ag的修饰降低了HER反应的势垒能，提高了催化剂的效率。反过来，二硫化钼的层状结构为银纳米颗粒的均匀加载提供了基质。更重要的是，在10 wt% Ag/MoS2条件下，更低的Tafel值（74 mV/dec）、更低的电荷转移电阻和更高的双电层电容明显表明，由于Ag和MoS2之间的界面改善以及暴露活性位点的增加，HER性能得到了增强，稳定性也得到了增强。因此，本研究明确地关注于原位加载Ag在MoS2上的研究，这为活性位点提供了更多的可达性，以提高HER活性。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.