富氮聚合物衍生碳材料的制备及其氧还原催化性能研究

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• 英文论文题名：Nitrogen-rich Polymer Derived Carbon-based Materials and Their Catalytic Performance of Oxygen Reduction Reaction
• 论文作者：赵勇
• 英文论文作者：Yong Zhao ; Key Lab for Special Functional Materials of Ministry of Education ; Henan University
• 年：2016
• 作者机构：河南大学特种功能材料教育部重点实验室河南省开封市河南大学金明校区特种功能材料实验室;
• 论文关键词：氧还原反应 ; 富氮聚合物 ; 金属活性位点
• 会议召开时间：2016-07-01
• 会议录名称：中国化学会第30届学术年会摘要集-第二十九分会：电化学材料
• 语种：中文
• 分类号：O613.71;O643.3
• 学会代码：ZGHY
• 会议名称：中国化学会第30届学术年会-第二十九分会 ; 电化学材料
• 会议地点：中国辽宁大连
• 主办单位：中国化学会
• 学会名称：中国化学会
• 页数：1
• 文件大小：107k
• 原文格式：D
• 会议级别：全国

摘要

廉价且高活性的氧还原电催化剂对燃料电池和金属空气电池的工业化应用起到至关重要的作用。1-5由于其可调控的外层电子和自旋结构,异质原子掺杂碳材料作为氧还原催化剂被广泛地研究,且其活性和稳定性已经接近于贵金属铂基材料。在本文中,我们报道了一系列基于富氮聚合物衍生的异质原子掺杂碳材料,它们具有高密度金属位点以及高比表面积。研究结果表明富氮聚合物为前驱体制备的异质原子掺杂碳材料的氧还原活性远高于常规低氮聚合物制备的碳材料氧还原催化活性。在酸性和碱性电解质体系中,其氧还原催化性能接近甚至超越了贵金属铂基材料的活性,其高催化活性来源于高密度金属活性位点和高比表面积。
Cost-effective and highly-performance oxygen reduction reaction(ORR) electrocatalysts are essential for the industrial application of various types of fuel cells and metal-air batteries. Carbon materials co-doped with nitrogen and transition metals(M-N_x/C) have been widely studied as ORR catalysts because of their tunable electronic and spin structure in outer orbital, and advanced ORR activity and stability that resemble those of Pt-based precious metal catalysts. In this study, we report a series of M-N_x/C materials with dense metal sites and high surface area by using nitrogen-rich polymers as the starting precursors. The results indicated that the ORR activity of M-N_x/C materials was substantially promoted by using nitrogen-rich polymer precursors compared with that those of general nitrogen-contained polymers. The newly-developed M-N_x/C catalysts exhibited comparable ORR activity to that of commercial Pt/C catalysts in the alkaline and acidic medium, respectively.

引文

[1]Zhao,Y.;Watanabe,K.;Hashimoto,K.J.Am.Chem.Soc.2012,134,19528.
    [2]Zhao,Y.;Watanabe,K.;Hashimoto,K.J.Mater.Chem.2012,22,12263.
    [3]Zhao,Y.;Watanabe,K.;Hashimoto,K.J Mater Chem A 2013,1,1450.
    [4]Zhao,Y.;Nakamura,R.;Kamiya,K.;Nakanishi,S.;Hashimoto,K.Nat.Commun.2013,4.
    [5]Zhao,Y.;Kamiya,K.;Hashimoto,K.;Nakanishi,S.J.Mater.Chem.A 2016,4,3858.