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首页> 外文期刊>Chemistry: A European journal >One-Step Fabrication of Monolithic Electrodes Comprising Co_9S_8 Particles Supported on Cobalt Foam for Efficient and Durable Oxygen Evolution Reaction
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One-Step Fabrication of Monolithic Electrodes Comprising Co_9S_8 Particles Supported on Cobalt Foam for Efficient and Durable Oxygen Evolution Reaction

机译：一步制造包含Co_9S_8颗粒的整体电极，所述钴泡沫泡沫负载用于有效且耐用的氧气进化反应

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摘要

A very easy and cost-effective approach to the fabrication of monolithic Co_9S_8 water oxidation electrodes (Co@Co_9S_8), fabricated by one-step hydrothermal treatment of commercially available cobalt foam in the presence of thiourea, is reported. The morphology, crystal structure, microstructure, and composition of as-fabricated Co@Co_9S_8 electrodes were examined by using scanning electron microscopy (SEM), powder X-ray diffractometry (XRD), transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS), and their electrochemical properties were investigated by cyclic voltammetry (CV), chronopotentiometry (CP), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). When used to catalyze the oxygen evolution reaction (OER) in alkaline solution, the Co@Co_9S_8 electrode with an optimal Co_9S_8 loading exhibits outstanding catalytic activity, requiring a low overpotential of 350 mV to deliver an anodic current density of 10 mAcm~(-2) and showing fast kinetics for OER with a small Tafel slope (55 mVdec~(-1)) and charge-transfer resistance (0.44 ?cm~(-2)), which outperforms many sulfide-based OER catalysts and some state-of-the-art noble metal catalysts recently reported in the literature. Importantly, the electrodes show excellent long-term stability, and are capable of operating at both a low current density and a high current density relevant to industrial water electrolysis up to 100 hours.
机译：报道了在硫脲存在下，通过一步水热处理商业上可获得的钴泡沫制备的单片CO_9S_8水氧化电极（CO @ CO_9S_8）制备的非常简单且经济有效的方法。通过使用扫描电子显微镜（SEM），粉末X射线衍射术（XRD），透射电子显微镜（TEM），透射电子显微镜（TEM）和X射线光电子和X射线光电子（X射线照相电器通过循环伏安法（CV），步数术（CP），计时率（CA）和电化学阻抗光谱（EIS）研究光谱学（XPS）及其电化学性质。当用于催化碱性溶液中的氧化反应（OER）时，具有最佳CO_9S_8负载的CO @ CO_9S_8电极表现出优异的催化活性，要求350 mV的低过电流以提供10mmm〜（-2的阳极电流密度）用小Tafel斜坡（55mVdec〜（-1））和电荷 - 转移电阻（0.44Ω·cm〜（-2））表示快速动力学，这优于许多基于硫化物的oer催化剂和一些状态 - 最近在文献中报道的艺术贵金属催化剂。重要的是，电极显示出优异的长期稳定性，并且能够以低电流密度和与工业水电解的高电流密度运行，高达100小时。

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  • 来源
    《Chemistry: A European journal》 |2017年第36期|共7页
  • 作者

    Dehua Xiong; Qingqing Zhang; Sitaramanjaneya Mouli Thalluri; Junyuan Xu; Wei Li; Xiuli Fu; Lifeng Liu;

  • 作者单位

    International Iberian Nanotechnology Laboratory (INL) Av. Mestre Jose Veiga 4715-330 Braga (Portugal);

    State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology Wuhan 430070 (P. R. China);

    International Iberian Nanotechnology Laboratory (INL) Av. Mestre Jose Veiga 4715-330 Braga (Portugal);

    International Iberian Nanotechnology Laboratory (INL) Av. Mestre Jose Veiga 4715-330 Braga (Portugal);

    International Iberian Nanotechnology Laboratory (INL) Av. Mestre Jose Veiga 4715-330 Braga (Portugal);

    State Key Laboratory of Information Photonics and Optical Communications and School of Science Beijing University of Posts and Telecommunications Beijing 100876 (P. R. China);

    International Iberian Nanotechnology Laboratory (INL) Av. Mestre Jose Veiga 4715-330 Braga (Portugal);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    Co_9S_8; electrocatalysis; nanostructures; oxygen evolution reaction; water splitting;

    机译：CO_9S_8;电致分析;纳米结构;氧气进化反应;水分裂;

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