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首页> 外文期刊>RSC Advances >In situ hybridization of an MXene/TiO2/NiFeCo-layered double hydroxide composite for electrochemical and photoelectrochemical oxygen evolution
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In situ hybridization of an MXene/TiO2/NiFeCo-layered double hydroxide composite for electrochemical and photoelectrochemical oxygen evolution

机译：用于电化学和光电化学氧气进化的MXENE / TiO2 / Nifeco层双氢氧化物复合材料的原位杂交

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摘要

Electrochemical and photoelectrochemical (PEC) oxygen evolution reactions (OER) are receiving considerable attention owing to their important roles in the overall water splitting reaction. In this contribution, ternary NiFeCo-layered double hydroxide (LDH) nanoplates were in situ hybridized with Ti3C2Tx (the MXene phase) via a simple solvothermal process during which Ti3C2Tx was partially oxidized to form anatase TiO2 nanoparticles. The obtained Ti3C2Tx/TiO2/NiFeCo-LDH composite (denoted as TTL) showed a superb OER performance as compared with pristine NiFeCo-LDH and comercial IrO2 catalyst, achieving a current density of 10 mA cm(-2) at a potential of 1.55 V versus a reversible hydrogen electrode (vs. RHE) in 0.1 M KOH. Importantly, the composite was further deposited on a standard BiVO4 film to construct a TTL/BiVO4 photoanode which showed a significantly enhanced photocurrent density of 2.25 mA cm(-2) at 1.23 V vs. RHE under 100 mW cm(-2) illumination. The excellent PEC-OER performance can be attributed to the presence of TiO2 nanoparticles which broadened the light adsorption to improve the generation of electron/hole pairs, while the ternary LDH nanoplates were efficient hole scavengers and the metallic Ti3C2Tx nanosheets were effective shuttles for transporting electrons/ions. Our in situ synthetic method provides a facile way to prepare multi-component catalysts for effective water oxidation and solar energy conversion.
机译：由于其在整个水分裂反应中的重要作用，电化学和光电化学（PEC）氧气进化反应（oer）正在受到相当大的关注。在该贡献中，通过简单的溶剂热方法与Ti3C2Tx（MXENE相）与Ti3C2Tx（MXENE相）杂交的三元镍酯层，在其中将Ti3C2Tx部分氧化以形成锐钛矿TiO2纳米颗粒。所获得的Ti3C2Tx / TiO 2 / Nifeco-LDH复合物（表示为TTL），与原始的Nifeco-LDH和可促进的IRO2催化剂相比，实现了一流的OER性能，在1.55V的电位下实现了10 mA cm（-2）的电流密度与0.1M KOH中的可逆氢电极（Vs. rhe）相反。重要的是，将复合材料进一步沉积在标准BIVO4膜上以构建TTL / BIVO4光电码，其在100mWcm（-2）照明下，在1.23V与rhe下显示出2.25mA cm（-2）的显着增强的光电流密度。优异的PEC-OER性能可以归因于TiO2纳米颗粒的存在，该纳米颗粒拓宽光吸附以改善电子/孔对的产生，而三元LDH纳米板是有效的孔清除剂，金属Ti3C2TX纳米片是用于运输电子的有效梭子/离子。我们的原位合成方法提供了制备多组分催化剂以进行有效水氧化和太阳能转换的容易方式。

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  • 来源
    《RSC Advances》 |2018年第37期|共9页
  • 作者

    Hao Ningxian; Wei Yang; Wang Jialiang; Wang Zhiwei; Zhu Zhaohua; Zhao Shulin; Han Min; Huang Xiao;

  • 作者单位

    Nanjing Tech Univ NanjingTech IAM 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

    Nanjing Tech Univ NanjingTech IAM 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

    Nanjing Tech Univ NanjingTech IAM 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

    Nanjing Tech Univ NanjingTech IAM 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

    Nanjing Tech Univ NanjingTech IAM 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

    Nanjing Normal Univ Sch Chem &

    Mat Sci Jiangsu Key Lab Biofunct Mat 1 Wenyuan Rd Nanjing 210023 Jiangsu Peoples R China;

    Nanjing Normal Univ Sch Chem &

    Mat Sci Jiangsu Key Lab Biofunct Mat 1 Wenyuan Rd Nanjing 210023 Jiangsu Peoples R China;

    Nanjing Tech Univ NanjingTech IAM 30 South Puzhu Rd Nanjing 211816 Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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