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首页> 外文期刊>Advanced energy materials >Tunable and Efficient Tin Modified Nitrogen-Doped Carbon Nanofibers for Electrochemical Reduction of Aqueous Carbon Dioxide
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Tunable and Efficient Tin Modified Nitrogen-Doped Carbon Nanofibers for Electrochemical Reduction of Aqueous Carbon Dioxide

机译：可调谐和高效的锡改性氮掺杂碳纳米纤维，用于电化学还原二氧化碳水溶液

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摘要

Efficient and selective earth-abundant catalysts are highly desirable to drive the electrochemical conversion of CO2 into value-added chemicals. In this work, a low-cost Sn modified N-doped carbon nanofiber hybrid catalyst is developed for switchable CO2 electroreduction in aqueous medium via a straightforward electrospinning technique coupled with a pyrolysis process. The electrocatalytic performance can be tuned by the structure of Sn species on the N-doped carbon nanofibers. Sn nanoparticles drive efficient formate formation with a high current density of 11 mA cm(-2) and a faradaic efficiency of 62% at a moderate overpotential of 690 mV. Atomically dispersed Sn species promote conversion of CO2 to CO with a high faradaic efficiency of 91% at a low overpotential of 490 mV. The interaction between Sn species and pyridinic-N may play an important role in tuning the catalytic activity and selectivity of these two materials.
机译：迫切需要高效和选择性的富含地球的催化剂，以推动CO2电化学转化为增值化学品。在这项工作中，开发了一种低成本的Sn改性的N掺杂碳纳米纤维杂化催化剂，用于通过直接电纺丝技术和热解工艺在水性介质中进行可切换的CO2电还原。可以通过N掺杂碳纳米纤维上Sn物种的结构来调节电催化性能。锡纳米颗粒以690 mV的中等过电势驱动有效的甲酸形成，具有11 mA cm（-2）的高电流密度和62％的法拉第效率。原子分散的Sn物种在490 mV的低过电势下以91％的高法拉第效率促进了CO2向CO的转化。 Sn物种与吡啶-N之间的相互作用可能在调节这两种材料的催化活性和选择性方面起重要作用。

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  • 来源
    《Advanced energy materials》 |2018年第10期|1702524.1-170252.9|共9页
  • 作者

    Zhao Yong; Liang Jiaojiao; Wang Caiyun; Ma Jianmin; Wallace Gordon G.;

  • 作者单位

    Univ Wollongong, AIIM, Intelligent Polymer Res Inst, ARC Ctr Excellence Electromat Sci, Innovat Campus, North Wollongong, NSW 2522, Australia;

    Hunan Univ, Sch Phys & Elect, Minist Educ, Key Lab Micro Nanooptoelect Devices, Changsha 410082, Hunan, Peoples R China;

    Univ Wollongong, AIIM, Intelligent Polymer Res Inst, ARC Ctr Excellence Electromat Sci, Innovat Campus, North Wollongong, NSW 2522, Australia;

    Hunan Univ, Sch Phys & Elect, Minist Educ, Key Lab Micro Nanooptoelect Devices, Changsha 410082, Hunan, Peoples R China;

    Univ Wollongong, AIIM, Intelligent Polymer Res Inst, ARC Ctr Excellence Electromat Sci, Innovat Campus, North Wollongong, NSW 2522, Australia;

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  • 正文语种 eng
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  • 关键词

    atomically dispersed tin; carbon dioxide reduction; electrocatalysis; nitrogen-doped carbon nanofibers; tin nanoparticles;

    机译：原子分散锡二氧化碳还原电催化氮掺杂碳纳米纤维锡纳米颗粒;

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