Ruthenium single atoms implanted on NiS2-FeS2 nanosheet heterostructures for efficacious water electrolysis,Journal of Materials Chemistry A

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Ruthenium single atoms implanted on NiS2-FeS2 nanosheet heterostructures for efficacious water electrolysis
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2024-01-12 , DOI: 10.1039/d3ta05630a
Ram Babu Ghising ₁ , Uday Narayan Pan ₁ , Mani Ram Kandel ₁ , Purna Prasad Dhakal ₁ , Saleem Sidra ₂ , Do Hwan Kim ₂ , Nam Hoon Kim ₁ , Joong Hee Lee _{1,

3}

Affiliation

The catalytic potential of single atom incorporated heterostructures holds substantial promise because of their ability to offer customizable chemical functionality and abundant active sites. In this study, a novel approach is employed to synthesize ruthenium single atoms (Ru_SA) implanted on bimetallic NiFe-LDH derived sulfide nanosheet heterostructures (Ru_SA-NiS₂-FeS₂) via a facile technique. Experimental findings demonstrate that Ru_SA-NiS₂-FeS₂ exhibits lower overpotential (η) for water splitting. Specifically, the hydrogen evolution reaction (HER) overpotentials at current densities of (10 and 100) mA cm⁻² are measured to be (57 and 187) mV, respectively. Similarly, at (20 and 100) mA cm⁻², the oxygen evolution reaction (OER) overpotentials are recorded to be (242 and 304) mV, respectively. Conspicuously, the Ru_SA-NiS₂-FeS₂ (+, −) electrolyzer requires cell potentials of (1.47 and 1.74) V at (10 and 100) mA cm⁻², lower than the cell potentials of (1.57 and 1.92) V required by the RuO₂@NF (+)//Pt–C@NF (−) device to achieve similar current densities. These experimental results and the Density Functional Theory (DFT) calculations unveil that our research offers a promising method for single atom implanted heterostructures that can be used for large-scale clean hydrogen production through water electrolysis.

中文翻译：

将钌单原子植入 NiS2-FeS2 纳米片异质结构以实现有效的水电解

单原子异质结构的催化潜力具有巨大的前景，因为它们能够提供可定制的化学功能和丰富的活性位点。在本研究中，采用一种新方法通过简便的技术合成植入双金属NiFe-LDH衍生的硫化物纳米片异质结构（Ru _SA -NiS ₂ -FeS ₂）上的钌单原子（Ru _{SA ）。}实验结果表明Ru _SA -NiS ₂ -FeS ₂表现出较低的水分解过电势( η )。^{具体地，测得电流密度为(10和100)mA cm -2}下的析氢反应(HER)过电势分别为(57和187)mV。类似地，在（20和100）mA cm ^-2下，析氧反应（OER）过电势分别记录为（242和304）mV。值得注意的是，Ru _SA -NiS ₂ -FeS ₂ (+, -) 电解槽在（10和100）mA cm ^-2时需要（1.47和1.74）V的电池电势，低于（1.57和1.92）V的电池电势RuO ₂ @NF (+)//Pt–C@NF (−) 器件需要达到相似的电流密度。这些实验结果和密度泛函理论（DFT）计算表明，我们的研究为单原子注入异质结构提供了一种有前景的方法，可用于通过水电解大规模生产清洁氢气。

更新日期：2024-01-14

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