2D metallic TaS₂ is acting as an ideal platform for exploring fundamental physical issues (superconductivity, charge‐density wave, etc.) and for engineering novel applications in energy‐related fields. The batch synthesis of high‐quality TaS₂ nanosheets with a specific phase is crucial for such issues. Herein, the successful synthesis of novel vertically oriented 1T‐TaS₂ nanosheets on nanoporous gold substrates is reported, via a facile chemical vapor deposition route. By virtue of the abundant edge sites and excellent electrical transport property, such vertical 1T‐TaS₂ is employed as high‐efficiency electrocatalysts in the hydrogen evolution reaction, featured with rather low Tafel slopes ≈67–82 mV dec⁻¹ and an ultrahigh exchange current density ≈67.61 µA cm⁻². The influence of phase states of 1T‐ and 2H‐TaS₂ on the catalytic activity is also discussed with the combination of density functional theory calculations. This work hereby provides fundamental insights into the controllable syntheses and electrocatalytic applications of vertical 1T‐TaS₂ nanosheets achieved through the substrate engineering.

中文翻译：

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用于高性能电催化应用的纳米孔金上的垂直1T-TaS2合成

2D金属TaS ₂是探索基本物理问题（超导性，电荷密度波等）以及在能源相关领域进行工程新应用的理想平台。具有特定相的高质量TaS ₂纳米片的批量合成对于此类问题至关重要。本文报道了一种通过便捷的化学气相沉积方法在纳米多孔金基底上成功合成新型垂直取向的1T-TaS ₂纳米片的方法。凭借丰富的边缘位点和出色的电传输性能，这种垂直的1T-TaS ₂被用作制氢反应中的高效电催化剂，其塔菲尔斜率相当低，≈67-82mV dec ^-1交换电流密度约为67.61 µA cm ^-2。结合密度泛函理论计算，还讨论了1T-和2H-TaS ₂的相态对催化活性的影响。因此，这项工作为通过基材工程实现的垂直1T-TaS ₂纳米片的可控合成和电催化应用提供了基础见解。