Binary V–Mo sulfides grown on CNTs with morphological and electronic modulation for enhanced hydrogen evolution,CrystEngComm

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Binary V–Mo sulfides grown on CNTs with morphological and electronic modulation for enhanced hydrogen evolution
CrystEngComm ( IF 2.6 ) Pub Date : 2021-08-16 , DOI: 10.1039/d1ce00938a
Xianpei Ren _{1,

2,

3} , Qingbo Wei ₄ , Fei Wu ₁ , Yonghua Wang ₁ , Qiang Li ₁

Affiliation

Transition metal sulfides, such as molybdenum sulfide and vanadium sulfide, have recently attracted substantial attention due to their potential application to the catalysis of the hydrogen evolution reaction (HER). Alloying is one of the powerful methods to exceed the intrinsic properties of pure metals. In this study, we report a simple one-step sintering method to synthesize MoS₂, V_1.5S₂ and V–Mo–S alloys on carbon nanotubes (CNT/VMoS). Due to its compositional, morphological and electrical superiorities, the CNT/VMoS-2 catalyst recorded the optimal HER activity with a low overpotential of −146 mV at 10 mA cm⁻², a low Tafel slope of 61 mV dec⁻¹ and a very small R_ct value of 8.8 Ω, which were superior to CNT/MoS₂, CNT/V_1.5S₂ and other CNT/VMoS catalysts in acidic media, holding a great promise for practical water-splitting applications. We believe that the present work could broaden our horizon about the preparation of other transition metal sulfide alloys and provide a platform to understand the fundamental catalytic mechanism for improving HER performance.

中文翻译：

在具有形态和电子调制的碳纳米管上生长的二元 V-Mo 硫化物可增强析氢

过渡金属硫化物，如硫化钼和硫化钒，由于它们在析氢反应（HER）催化方面的潜在应用，最近引起了广泛关注。合金化是超越纯金属固有特性的有效方法之一。在这项研究中，我们报告了一种简单的一步烧结方法来合成碳纳米管 (CNT/VMoS) 上的MoS ₂、V _1.5 S ₂和 V-Mo-S 合金。由于其组成、形态和电学优势，CNT/VMoS-2 催化剂记录了最佳 HER 活性，在 10 mA cm ^-2时具有-146 mV 的低过电位、61 mV dec ^-1的低 Tafel 斜率和非常小R _ct8.8 Ω 的值，在酸性介质中优于 CNT/MoS ₂、CNT/V _1.5 S ₂和其他 CNT/VMoS 催化剂，在实际水分解应用中具有很大的前景。我们相信，目前的工作可以拓宽我们制备其他过渡金属硫化物合金的视野，并为了解提高 HER 性能的基本催化机制提供平台。

更新日期：2021-09-13

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