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首页> 外文期刊>ACS applied materials & interfaces >CO2 Electroreduction at Low Overpotential on Oxide-Derived Cu/Carbons Fabricated from Metal Organic Framework
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CO2 Electroreduction at Low Overpotential on Oxide-Derived Cu/Carbons Fabricated from Metal Organic Framework

机译：在金属有机骨架制造的氧化物衍生的Cu /碳的低过电流下的CO2电气

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摘要

Electrochemical reduction of CO2 to chemical feedstocks is an attractive solution that prevents CO2 accumulation in the atmosphere, but it remains a great challenge to develop the cost-effective catalysts. Herein, we synthesized oxide-derived Cu/carbon (OD Cu/C) catalysts by a facile carbonization of Cu-based MOF (HKUST-1). The resulting materials exhibited highly selective CO2 reduction to alcohol compounds with total faradic efficiencies of 45.2-71.2% at -0.1 to -0.7 V versus reversible hydrogen electrode (RHE). High-yield methanol and ethanol has been achieved on OD Cu/C-1000 with the production rates of 5.1-12.4 and 3.7-13.4 mg L-1 h(-1), respectively. Notably, the onset potential for C2H5OH formation is near -0.1 V (versus RHE), corresponding to similar to 190 mV of overpotential, which is among the lowest overpotentials reported to date for the reduction of CO2 to C2H5OH. The improvements in activity and selectivity of the oxide-derived Cu/carbon might be attributed to the synergistic effect between the highly dispersed copper and the matrix of porous carbon. These findings provide a new insight into design of practical catalysts for decreasing atmospheric CO2 levels and synthesizing liquid fuels.
机译：二氧化碳的电化学还原到化学原料是一种吸引力的溶液，可防止大气中的CO 2积聚，但开发成本效益催化剂仍然是一个很大的挑战。在此，我们通过Cu基MOF的容易碳化（HKust-1）合成氧化衍生的Cu /碳（OD Cu / C）催化剂。所得材料表现出高度选择性的CO 2降低至醇化合物，其在-0.1至-0.7V的45.2-71.2％下的醇化合物与可逆氢电极（RHE）。在OD Cu / C-1000上已经实现了高产甲醇和乙醇，其生产率分别为5.1-12.4和3.7-13.4mg L-1 H（-1）。值得注意的是，C2H5OH形成的发病电位接近-0.1V（与RHE），对应于类似于190mV的过电位，这是迄今为止减少CO 2至C2H5OH的最低过电位之一。氧化物衍生的Cu /碳的活性和选择性的改善可能归因于高度分散的铜和多孔碳基质之间的协同效应。这些调查结果提供了对实际催化剂设计的新洞察，用于减少大气二氧化碳水平和合成液体燃料。

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  • 来源
    《ACS applied materials & interfaces》 |2017年第6期|共10页
  • 作者

    Zhao Kun; Liu Yanming; Quan Xie; Chen Shuo; Yu Hongtao;

  • 作者单位

    Dalian Univ Technol Sch Environm Sci &

    Technol Minist Educ Key Lab Ind Ecol &

    Environm Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Environm Sci &

    Technol Minist Educ Key Lab Ind Ecol &

    Environm Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Environm Sci &

    Technol Minist Educ Key Lab Ind Ecol &

    Environm Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Environm Sci &

    Technol Minist Educ Key Lab Ind Ecol &

    Environm Engn Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Environm Sci &

    Technol Minist Educ Key Lab Ind Ecol &

    Environm Engn Dalian 116024 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    carbon dioxide; electrochemical reduction; oxide-derived Cu/carbon; alcohol; metal organic framework;

    机译：二氧化碳;电化学减少;氧化物衍生的Cu /碳;酒精;金属有机框架;

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