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Influence of annealing temperature on oxygen reduction activity of sputtered Co catalysts on vertically-aligned carbon nanotubes
Luo, Zhijian1; Zhao, Bin1; Liu, Yunmei1; Zhang, Huijuan1; Tang, Zhihong1; Li, Jianqiang2; Yang, Junhe1
2015-04-10
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume161Issue:APRPages:72-79
Abstract

Cobalt and nitrogen were incorporated onto vertically-aligned carbon nanotubes (VACNTs) by a two-step process involving reactive sputtering and heat treatment to fabricate Co/N/CNT catalyst for oxygen reduction reaction (ORR). Both cyclic voltammetry (CV) and rotating-disk electrode (RDE) results demonstrate that annealing temperature plays an important role on improving catalyst activity, and the best ORR performance are obtained for the catalyst with Co loading of 34.3 mu g/cm(2) at 400 degrees C with peak potential of 0.778 V, and onset potential of 0.933 V in 0.1 M KOH. For the best catalyst of 400 degrees C treated, rotating-ring disk electrode (RRDE) measurement indicates that the number of electrons transferred is around 3.4 within the whole potential range. Effects of annealing temperature on surface morphology and chemical composition have been investigated using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Based on XPS and electrochemical results, the enhanced ORR activity of the optimal Co/N/CNT catalyst is ascribed to the higher content of pyrrollic-N. (C) 2015 Elsevier Ltd. All rights reserved.

KeywordOxygen Reduction Reaction Non-precious Metal Catalyst Nitrogen-doping Sputtered Co Catalyst Annealing Temperature
SubtypeArticle
Subject AreaElectrochemistry
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.electacta.2015.01.225
Indexed BySCI
Language英语
WOS KeywordMembrane-fuel-cells ; Nitrogen Functionalities ; Electrocatalyst ; Support ; Forests ; Pemfcs
Funding ProjectNSFC [51072118, 51272157, 21406139] ; Key Basic Research of Shanghai Science and Technology Program [12JC1406900] ; Hujiang Foundation of China [B14006]
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000351693500010
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13781
Collection研究所(批量导入)
Corresponding AuthorZhao, Bin
Affiliation1.Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Luo, Zhijian,Zhao, Bin,Liu, Yunmei,et al. Influence of annealing temperature on oxygen reduction activity of sputtered Co catalysts on vertically-aligned carbon nanotubes[J]. ELECTROCHIMICA ACTA,2015,161(APR):72-79.
APA Luo, Zhijian.,Zhao, Bin.,Liu, Yunmei.,Zhang, Huijuan.,Tang, Zhihong.,...&Yang, Junhe.(2015).Influence of annealing temperature on oxygen reduction activity of sputtered Co catalysts on vertically-aligned carbon nanotubes.ELECTROCHIMICA ACTA,161(APR),72-79.
MLA Luo, Zhijian,et al."Influence of annealing temperature on oxygen reduction activity of sputtered Co catalysts on vertically-aligned carbon nanotubes".ELECTROCHIMICA ACTA 161.APR(2015):72-79.
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