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Synthesis of MoP decorated carbon cloth as a binder-free electrode for hydrogen evolution

机译：橡胶装饰碳布的合成作为无粘合剂的氢气进化

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摘要

Electrocatalysts play a vital role in electrochemical water-splitting for hydrogen production. However, searching for low-cost and earth-abundant electrocatalysts remains a challenge. In this study, we report the synthesis of mesoporous molybdenum phosphide hemispheres as electrocatalysts and their direct growth on a carbon cloth (MoP-HS@CC) to create a self-supported electrode for efficient hydrogen evolution. The obtained MoP-HS@CC was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and nitrogen adsorption-desorption. MoP-HS@CC not only has a large surface area, it also possesses rich porosity. In addition, as a binder-free electrode for hydrogen evolution, MoP-HS@CC exhibits a low onset overpotential of 30 mV, a small Tafel slope of 61 mV dec(-1), and a large exchange current density of 0.438 mA cm(-2) in acidic electrolytes. It affords current densities of 10 and 100 mA cm(-2) at overpotentials of 87 and 195 mV, respectively. Moreover, MoP-HS@CC shows a strong tolerance to working environment both in acidic and alkaline conditions. This study essentially offers a simple and viable strategy for preparing highly efficient and flexible electrodes on a large-scale for electrochemical water-splitting technology.
机译：电催化剂在电化学水分中发挥着至关重要的作用，用于氢气生产。然而，寻找低成本和地球丰富的电催化剂仍然是一个挑战。在这项研究中，我们报道了源钼钼的合成作为电催化剂和它们在碳布（MOP-HS @ CC）上的直接生长，以产生自支撑电极以获得有效的氢气进化。通过扫描电子显微镜，透射电子显微镜，X射线衍射，X射线光电子体光谱和氮吸附 - 解吸来表征获得的MOP-HS @ CC。 MOP-HS @ CC不仅具有大的表面积，它也具有丰富的孔隙度。另外，作为氢气进化的可粘合剂电极，MOP-HS @ CC表现出30mV的低发起过电位，小Tafel斜率为61 mV（-1），并且大的交换电流密度为0.438 mA cm （-2）酸性电解质。它分别在87和195mV的过电位下提供10和100 mA cm（-2）的电流密度。此外，MOP-HS @ CC对酸性和碱性条件均显示出对工作环境的强耐受性。本研究基本上提供了一种简单且可行的策略，用于在大规模用于电化学水分解技术上为高效和柔性的电极提供高效和柔性的电极。

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  • 来源
    《RSC Advances》 |2016年第73期|共6页
  • 作者

    Deng Chen; Xie Jiangzhou; Xue Yifei; He Meng; Wei Xiaotong; Yan Yi-Ming;

  • 作者单位

    Beijing Inst Technol Sch Chem Engn &

    Environm Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Chem Engn &

    Environm Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Chem Engn &

    Environm Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Chem Engn &

    Environm Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Chem Engn &

    Environm Beijing 100081 Peoples R China;

    Beijing Inst Technol Sch Chem Engn &

    Environm Beijing 100081 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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