铁/钴质量比对MWCNT-聚苯胺复合物氧还原电活性的影响

doi:10.3969/j.issn.0438-1157.2014.06.023

化工学报 ›› 2014, Vol. 65 ›› Issue (6): 2113-2119.DOI: 10.3969/j.issn.0438-1157.2014.06.023

• 催化、动力学与反应器 • 上一篇下一篇

铁/钴质量比对MWCNT-聚苯胺复合物氧还原电活性的影响

张玉晖, 易清风

湖南科技大学化学化工学院, 湖南湘潭 411201

收稿日期:2013-07-22 修回日期:2014-03-06 出版日期:2014-06-05 发布日期:2014-06-05
通讯作者: 易清风
作者简介:张玉晖（1987- ），女，硕士研究生。
基金资助:
国家自然科学基金项目（21376070，20876038）；湖南省高校创新平台开放基金项目（11K023）；湖南省自然科学基金项目（14JJ2096）。

Effect of Fe/Co mass ratio on activity of non-noble metal catalyst for oxygen reduction reaction

ZHANG Yuhui, YI Qingfeng

School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China

Received:2013-07-22 Revised:2014-03-06 Online:2014-06-05 Published:2014-06-05
Supported by:
supported by the National Natural Science Foundation of China(21376070，20876038) and the Natural Science Foundation of Hunan Province(14JJ2096).

摘要/Abstract

摘要： 中心金属离子在非贵金属C-N复合物对氧还原反应（ORR）的电催化活性方面有重要作用。通过将含有多壁碳纳米管（MWCNTs）、聚苯胺与过渡金属Fe和Co的前驱体在N₂气氛下于900℃下加热，得到了不同金属比例的C-N催化剂。采用SEM、XRD等对催化剂的结构进行了表征。利用电化学伏安技术，研究了催化剂对ORR的电催化活性及其稳定性。结果表明，当Fe与Co质量比为6：1时催化剂的催化活性最好，在酸性溶液中ORR起始电位达到0.52 V（vs SCE），电流密度为12.5 mA·mg^-1@-0.3 V （vs SCE）；在碱性溶液中ORR 起始电位为-0.09 V（vs SCE），电流密度为7.8 mA·mg^-1@-0.8 V （vs SCE）。结果表明，催化剂中Fe与Co的质量比对催化剂的活性有很大影响。

关键词: 电化学, 燃料电池, 催化, 氧还原, 非贵金属催化剂

Abstract: Transition metal has an important effect on the electrocatalytic activity of non-noble metal catalysts for oxygen reduction reaction (ORR). In this work, the precursor containing MWCNTs, polyaniline, Fe and Co was firstly synthesized, and then the precursor was heated at 900℃ under N₂ to obtain the C-N catalysts with different Fe/Co mass ratios. The structure of the catalysts was investigated with SEM and X-ray diffraction. ORR activity of the catalysts in acidic and alkaline media was tested with voltammetry. The prepared catalyst with Fe/Co mass ratio of 6:1 presents the highest electrocatalytic activity for ORR. ORR current density at 2000 r·min^-1 was 12.5 mA·mg^-1@-0.3 V(vs SCE) in acidic solution and 7.8 mA·mg^-1@-0.8 V(vs SCE) in alkaline solution, and onset potential of ORR was 0.52 V(vs SCE) in acidic solution and-0.09 V(vs SCE) in alkaline solution. Fe/Co mass ratio played a great role in the electrocatalytic activity of these non-noble metal catalysts for ORR.

Key words: electrochemistry, fuel cell, catalysis, oxygen reduction reaction, non-noble metal catalyst

中图分类号:

TQ152

张玉晖, 易清风. 铁/钴质量比对MWCNT-聚苯胺复合物氧还原电活性的影响[J]. 化工学报, 2014, 65(6): 2113-2119.

ZHANG Yuhui, YI Qingfeng. Effect of Fe/Co mass ratio on activity of non-noble metal catalyst for oxygen reduction reaction[J]. CIESC Journal, 2014, 65(6): 2113-2119.

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铁/钴质量比对MWCNT-聚苯胺复合物氧还原电活性的影响

Effect of Fe/Co mass ratio on activity of non-noble metal catalyst for oxygen reduction reaction

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