Facile synthesis of electrocatalytically active NbS2 nanoflakes for an enhanced hydrogen evolution reaction (HER)†,Sustainable Energy & Fuels

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Facile synthesis of electrocatalytically active NbS2 nanoflakes for an enhanced hydrogen evolution reaction (HER)†
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2017-11-06 00:00:00 , DOI: 10.1039/c7se00376e
Deepesh Gopalakrishnan _{1,

2,

3,

4} , Andrew Lee _{1,

2,

3,

4} , Naresh Kumar Thangavel _{1,

2,

3,

4} , Leela Mohana Reddy Arava _{1,

2,

3,

4}

Affiliation

We report a simple ambient pressure annealing technique for the synthesis of ultrathin niobium disulfide (NbS₂) nanoflakes. The structure, morphology and composition of the as-synthesized NbS₂ flakes are well characterized using various microscopic and spectroscopic techniques. The synthesized two-dimensional layered NbS₂ is in stoichiometric proportion, and has a single crystal 3R-NbS₂ polymorph structure with semiconducting behavior and has abundant catalytic defect sites. In this paper, the hydrogen evolution reaction (HER) activity of the NbS₂ nanoflakes/rGO composite having dense exposed basal planes with improved conductivity is explored, and it is found to be a good HER catalyst in terms of low onset potential, low Tafel slope and high exchange current density.

中文翻译：

易于合成的具有电催化活性的NbS ₂纳米薄片，可增强析氢反应（HER）†

我们报告了一种用于超薄二硫化铌（NbS ₂）纳米薄片合成的简单环境压力退火技术。使用各种显微镜和光谱技术可以很好地表征合成后的NbS ₂薄片的结构，形态和组成。合成的二维层状NbS ₂以化学计量比例存在，具有具有半导体行为的单晶3R-NbS ₂多晶型物结构，并具有丰富的催化缺陷位点。本文研究了NbS ₂的氢释放反应（HER）活性研究了具有密集的暴露基面并具有改进的电导率的纳米薄片/ rGO复合材料，并且发现它在低起始电势，低Tafel斜率和高交换电流密度方面是良好的HER催化剂。

更新日期：2017-11-06

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