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An efficient CoO_x-SnO_x(Sb doped)/Ti electrocatalyst for the oxygen evolution reaction

机译：高效的CoO_x-SnO_x（Sb掺杂）/ Ti电催化剂用于氧释放反应

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摘要

The oxygen evolution reaction is considered the heart of water splitting technologies. Herein, we reported two CoOx-SnOx (Sb doped)/Ti (CSTE-480 and CSTE-600) as high conducive, active, stable and noble metal-free electrocatalysts for oxygen evolution reaction under alkaline condition. The CSTEs electrocatalyst containing conducive Ti-O-Sn(Sb)-O-Co chain were designed and synthesized via a simple layer-by-layer method. XRD, SEM, and FT-IR discovered that the two prepared CSTE electrodes had both amorphous cobalt oxides and octahedral Co3O4 spinel. Under the same conditions, the OER activities and stabilities of CSTEs were superior to commercial Pt and IrO2/Ti respectively. The overpotential and Tafel slope of CSTE-600 for OER at 10 mA.cm(-2) was only 317 mV and 40 mV/dec respectively, indicating that it was a highly active OER catalyst. The compared analysis of SEM, Co valence state, and XRD before and after reaction revealed that CSTE-600 was very stable. Moreover, The OER activity of CSTEs was affected by morphology, the redox of cobalt ion, SnTiO3, and Co2SnO4 on the surface. This strategy can be extended to synthesize other OER electrocatalysts.
机译：析氧反应被认为是水分解技术的核心。在本文中，我们报道了两种CoOx-SnOx（掺Sb）/ Ti（CSTE-480和CSTE-600）是在碱性条件下用于氧释放反应的高电导，活性，稳定和无贵金属的电催化剂。通过简单的逐层方法设计并合成了含有导电Ti-O-Sn（Sb）-O-Co链的CSTEs电催化剂。 XRD，SEM和FT-IR发现，两个制备的CSTE电极同时具有非晶氧化钴和八面体Co3O4尖晶石。在相同条件下，CSTEs的OER活性和稳定性分别优于商业Pt和IrO2 / Ti。 CSTE-600的OER在10 mA.cm（-2）时的过电势斜率和Tafel斜率分别仅为317 mV和40 mV / dec，表明它是一种高活性的OER催化剂。对反应前后的SEM，共价态和XRD进行比较分析，发现CSTE-600非常稳定。此外，CSTEs的OER活性受表面形态，钴离子，SnTiO3和Co2SnO4的氧化还原的影响。该策略可以扩展为合成其他OER电催化剂。

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  • 来源
    《Applied Surface Science》 |2019年第30期|143596.1-143596.9|共9页
  • 作者

    Wu Mingzhu; Li Ying; Du Jun; Tao Changyuan; Liu Zuohua;

  • 作者单位

    Chongqing Univ Chongqing Key Lab Chem Proc Clean Energy & Resour Coll Chem & Chem Engn Chongqing 400044 Peoples R China|Chongqing Ind Polytech Coll Chem Pollut Control Chongqing Appl Technol Extens Higher Vocat Coll Chongqing 401120 Peoples R China;

    Chongqing Ind Polytech Coll Chem Pollut Control Chongqing Appl Technol Extens Higher Vocat Coll Chongqing 401120 Peoples R China;

    Chongqing Univ Chongqing Key Lab Chem Proc Clean Energy & Resour Coll Chem & Chem Engn Chongqing 400044 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    CoOx-SnOx/Ti; Oxygen evolution reaction; Electrocatalyst;

    机译：CoOx-SnOx / Ti;析氧反应电催化剂;

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