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In situ preparation of a MOF-derived magnetic carbonaceous catalyst for visible-light-driven hydrogen evolution

机译：原位制备用于可见光驱动的氢进化的MOF衍生的磁性碳质催化剂

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摘要

MOFs (Metal-Organic Frameworks) have emerged as novel photocatalysts for water reduction but are frequently plagued by their instability when exposed to moist and strongly acidic or alkaline reaction environments. Herein we employed a volatile Fe-based MOF in alkaline solution as precursor to evolve into a magnetic carbonaceous photocatalyst in situ, which demonstrated highly efficient visible-light-driven hydrogen evolution (similar to 125 mu mol H-2 produced within 6 h using 5 mg of MOF precursor) with a quantum efficiency of 1.8% even in the absence of noble metal cocatalyst, indicative of a possible photocatalytic system containing only earth-abundant elements for long-term conversion of solar light into hydrogen energy. The catalyst exhibited an apparent stoichiometric formula of FeO3.3C0.2H1.0 and was determined to be essentially a carbon-metal oxides/oxyhydroxides composite. Laser photolysis and electrochemical measurements were performed to visualize the fundamental multistep electron transfer processes during water reduction, which opens a strategy for the rational design of MOF-derived catalysts to dramatically increase H-2 evolution efficiency.
机译：MOFs材料（金属有机骨架）已经成为用于降低水新型光催化剂，但是当暴露于潮湿和强酸性或碱性的反应环境中，经常可以通过不稳定的困扰。在此我们采用在碱性溶液中作为前体的挥发性Fe基MOF演变成原位磁性碳质光催化剂，其表现出高效率的可见光驱动析氢（类似于125亩基摩尔H-2使用5- 6小时内产生MOF前体），用1.8％甚至在不存在贵金属助催化剂，指示包含用于成氢能太阳光的长期转换仅地球丰富的元素的可能的光催化系统中的量子效率的毫克。该催化剂表现出FeO3.3C0.2H1.0的表观化学计量式和被确定为基本上由碳 - 金属氧化物/氢氧化物复合物。进行激光光解和电化学测定还原水，这将打开了MOF衍生的催化剂的合理设计大幅地提高H-2进化效率的策略中以可视化的基本多步电子转移过程。

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  • 来源
    《RSC Advances》 |2016年第3期|共8页
  • 作者

    Xu Jing-Yin; Zhai Xin-Ping; Gao Lin-Feng; Chen Peng; Zhao Min; Yang Hong-Bin; Cao Deng-Feng; Wang Qiang; Zhang Hao-Li;

  • 作者单位

    Lanzhou Univ State Key Lab Appl Organ Chem SKLAOC Minist Educ Key Lab Nonferrous Met Chem &

    Resources Utilizat Coll Chem &

    Chem Engn Key Lab Special Funct Mat &

    Lanzhou 730000 Peoples R China;

    Lanzhou Univ State Key Lab Appl Organ Chem SKLAOC Minist Educ Key Lab Nonferrous Met Chem &

    Resources Utilizat Coll Chem &

    Chem Engn Key Lab Special Funct Mat &

    Lanzhou 730000 Peoples R China;

    Lanzhou Univ State Key Lab Appl Organ Chem SKLAOC Minist Educ Key Lab Nonferrous Met Chem &

    Resources Utilizat Coll Chem &

    Chem Engn Key Lab Special Funct Mat &

    Lanzhou 730000 Peoples R China;

    Lanzhou Univ Sch Pharm Lanzhou 730020 Peoples R China;

    Lanzhou Univ State Key Lab Appl Organ Chem SKLAOC Minist Educ Key Lab Nonferrous Met Chem &

    Resources Utilizat Coll Chem &

    Chem Engn Key Lab Special Funct Mat &

    Lanzhou 730000 Peoples R China;

    Lanzhou Univ State Key Lab Appl Organ Chem SKLAOC Minist Educ Key Lab Nonferrous Met Chem &

    Resources Utilizat Coll Chem &

    Chem Engn Key Lab Special Funct Mat &

    Lanzhou 730000 Peoples R China;

    Lanzhou Univ State Key Lab Appl Organ Chem SKLAOC Minist Educ Key Lab Nonferrous Met Chem &

    Resources Utilizat Coll Chem &

    Chem Engn Key Lab Special Funct Mat &

    Lanzhou 730000 Peoples R China;

    Lanzhou Univ State Key Lab Appl Organ Chem SKLAOC Minist Educ Key Lab Nonferrous Met Chem &

    Resources Utilizat Coll Chem &

    Chem Engn Key Lab Special Funct Mat &

    Lanzhou 730000 Peoples R China;

    Lanzhou Univ State Key Lab Appl Organ Chem SKLAOC Minist Educ Key Lab Nonferrous Met Chem &

    Resources Utilizat Coll Chem &

    Chem Engn Key Lab Special Funct Mat &

    Lanzhou 730000 Peoples R China;

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