一步无溶剂法合成Fe-N掺杂的有序介孔碳及其优异的氧还原催化性能
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- 英文论文题名：One-step Solvent-free Synthesis of Ordered Fe/N Co-doped Mesoporous Carbon Materials for Highly Efficient Electrocatalysis
- 论文作者：陈智 ; 高兴敏 ; 姚艳 ; 吴铎 ; 吴张雄
- 英文论文作者：Zhi Chen ; X M Gao ; Y Yao ; D Wu ; Z X Wu ; School of Chemical and Environmental Engineering ; Soochow University
- 年：2016
- 作者机构：苏州大学化工与环境工程学院;
- 论文关键词：双掺杂 ; 介孔碳材料 ; 氨基酸 ; 高比表面 ; 氧还原性能
- 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：O643.36
- 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：209k
- 原文格式：D
- 会议级别：全国
摘要
我们通过简单的一步固相纳米铸造热解法,设计并合成了Fe-N双掺杂的有序介孔碳材料氧还原催化剂。我们采用经典的介孔二氧化硅作为硬模板,并首次以氨基酸作为唯一的碳源与氮源,将两种物质与含铁前驱体研磨均匀混合后直接焙烧,接着去除模版,最终得到具有高比表面积(1134 m~2/g)、二维六方介观结构、均一孔径(5.1 nm)、高含氮量(4.9 wt%)、高度石墨化的Fe/N掺杂有序介孔碳材料。在碱性条件下,所合成的催化剂具有很高的电催化氧还原活性,半波电位(-0.07 V vs Ag/AgCl)与极限电流均优于高活性的商业化Pt/C催化剂,并且具有很高的循环稳定性和化学耐受性。
Novel ordered mesoporous nitrogen/iron co-doped carbon(MN/Fe-C) catalysts have been rationally designed and synthesized by a simple solvent-free assembly method. In this facile method, mesoporous silicas were ground with amino acids and iron-containing precursor uniformly, followed by direct pyrolysis. In the resulted carbon materials, the ordered hexagonal mesostructures, high surface area(1134 m~2/g), ordered pore channels, and well-distributed Fe–Nx moieties embedded within the graphitic carbon backbones make them highly efficient for electro-catalyzing oxygen reduction reaction. The half-wave potential(-0.07 V vs Ag/AgCl) and the limited current density are both superior to commercial Pt/C catalysts. Furthermore, their excellent catalytic activity is extremely stable, and methanol-tolerant in alkaline conditions.
Novel ordered mesoporous nitrogen/iron co-doped carbon(MN/Fe-C) catalysts have been rationally designed and synthesized by a simple solvent-free assembly method. In this facile method, mesoporous silicas were ground with amino acids and iron-containing precursor uniformly, followed by direct pyrolysis. In the resulted carbon materials, the ordered hexagonal mesostructures, high surface area(1134 m~2/g), ordered pore channels, and well-distributed Fe–Nx moieties embedded within the graphitic carbon backbones make them highly efficient for electro-catalyzing oxygen reduction reaction. The half-wave potential(-0.07 V vs Ag/AgCl) and the limited current density are both superior to commercial Pt/C catalysts. Furthermore, their excellent catalytic activity is extremely stable, and methanol-tolerant in alkaline conditions.
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