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首页> 外文期刊>Electrochimica Acta >Porous coral reefs-like MoS2/nitrogen-doped bio-carbon as an excellent Pt support/co-catalyst with promising catalytic activity and CO-tolerance for methanol oxidation reaction
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Porous coral reefs-like MoS2/nitrogen-doped bio-carbon as an excellent Pt support/co-catalyst with promising catalytic activity and CO-tolerance for methanol oxidation reaction

机译：像多孔珊瑚礁一样的MOS2 /氮掺杂的生物碳作为优异的Pt载体/助催化剂，具有有希望的催化活性和用于甲醇氧化反应的共同耐受性

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摘要

The problems of poor electrocatalytic activity and CO tolerance and high Pt-loading of the Pt-based catalysts are still needed to be solved for direct methanol fuel cells. In this study, porous MoS2/nitrogendoped carbon (MoS2/CNX) as Pt supports/co-catalyst for methanol oxidation reaction (MOR) is successfully prepared by using waste bagasse as carbon source. Various material characterization techniques and electrochemical tests are performed to investigate the relationship between structural characteristics and MOR activity. The highly porous structure of CNX can provide abundant binding sites for growing well-dispersed MoS2 with coral-reef structure, which should facilitate the exposure of MoS2 edge to improve co-catalytic activity of MoS2/CNX. Pt/MoS2/CNX displays a higher mass activity (1030.2 mA mg(pt)(-1)) than those of Pt/MoS2/C (710.1 mA mg(pt)(-1)) and commercial Pt/C (405.4 mA mg(pt)(-1)), owing to that MoS2/CNX can afford abundant attachment sites to anchor Pt to enlarge the available electrochemically active area (111.2m(2)g(pt)(-1)) for MOR. With the introduction of porous CNX, more active sites on MoS2 edges are exposed out to dissociate water molecule for eliminating adsorbed CO-species on the active sites of Pt, which is conductive to enhance the durability and CO tolerance of Pt/MoS2/CNX. Furthermore, MoS2/CNX with high specific surface area (451.38 m(2) g(-1)) can offer sufficient oxygen-containing functional groups to facilitate the oxidation of intermediates (CO-species) on the active Pt sites, which can also promote the accessibility of methanol to the electroactive surface. These results provide a promising strategy for the design of highly active Pt support/co-catalyst to minimize Pt usage. (C) 2017 Elsevier Ltd. All rights reserved.
机译：仍然需要差电催化活性和CO耐受性和Pt基催化剂的高的Pt加载的需要解决的问题的用于直接甲醇燃料电池。在这项研究中，多孔二硫化钼/ nitrogendoped碳（二硫化钼/ CNX）例如Pt的载体/共催化剂对甲醇氧化反应（MOR）被成功地通过使用废物蔗渣作为碳源制备。各种材料表征技术和电化学测试以研究结构特征和MOR活性之间的关系。氮化碳的高度多孔结构可以提供丰富的结合位点用于与珊瑚礁结构，这将有利于边缘的MoS 2的曝光，以提高二硫化钼/氮化碳的共催化活性生长良好分散的二硫化钼。铂/二硫化钼/氮化碳显示更高的质量活性（1030.2毫安毫克（PT）（ - 1））比的Pt /二硫化钼/ C的（710.1毫安毫克（PT）（ - 1））和商业的Pt / C（405.4毫安毫克（PT）（ - 1）），由于该二硫化钼/氮化碳可以得到充足的附着位点到锚的Pt放大可用的电化学活性区域（111.2米（2）克（PT） - 对MOR）（1）。通过引入多孔CNX的，对二硫化钼边缘更活性位点被暴露出来，以解离水分子用于消除在Pt，其是导电的，以提高耐久性和Pt /二硫化钼/氮化碳的CO耐受性的活性部位吸附CO-物种。另外，二硫化钼/氮化碳具有高比表面积（451.38米（2）克（-1））可以提供足够的含氧官能团，以促进在活性位点的Pt中间体（CO-物种）的氧化，这也可以促进甲醇的可接近的电活性表面。这些结果提供了高活性的铂支撑/助催化剂的设计，以尽量减少铂的使用有希望的策略。 （c）2017 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Electrochimica Acta》 |2017年第2017期|共11页
  • 作者

    Tang Bo; Lin Yuhui; Xing Zipeng; Duan Yaqiang; Pan Siyu; Dai Ying; Yu Jia; Zou Jinlong;

  • 作者单位

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Sch Chem &

    Mat Sci Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Sch Chem &

    Mat Sci Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Sch Chem &

    Mat Sci Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Sch Chem &

    Mat Sci Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Sch Chem &

    Mat Sci Harbin 150080 Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Sch Chem &

    Mat Sci Harbin 150080 Heilongjiang Peoples R China;

    Harbin Engn Univ Coll Aerosp &

    Civil Engn Harbin Heilongjiang Peoples R China;

    Heilongjiang Univ Key Lab Funct Inorgan Mat Chem Minist Educ Peoples Republ China Sch Chem &

    Mat Sci Harbin 150080 Heilongjiang Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 电化学工业;物理化学（理论化学）、化学物理学;
  • 关键词

    Bagasse; Coral-reef structure; Methanol electrooxidation; Molybdenum disulfide; Nitrogen doping;

    机译：Bagasse;珊瑚礁结构;甲醇电氧化;二硫化钼;氮掺杂;

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