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

ZHANG Yuhui; YI Qingfeng

doi:10.3969/j.issn.0438-1157.2014.06.023

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

更新时间：2025-12-10

- Effect of Fe/Co mass ratio on activity of non-noble metal catalyst for oxygen reduction reaction
- CIESC Journal Issue 6, Pages: 2113-2119(2014)
- 作者机构：
  
  湖南科技大学化学化工学院,湖南,湘潭,411201
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.06.023
  CLC： Q152
- Online First：05 June 2014，
  
  Published：05 June 2014
- 稿件说明：
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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, (6): 2113-2119.
DOI：

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, (6): 2113-2119. DOI： 10.3969/j.issn.0438-1157.2014.06.023.

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。

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.

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