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Tuning alpha-Fe2O3 nanotube arrays for the oxygen reduction reaction in alkaline media
Xue, Yudong1,2; Jin, Wei1; Du, Hao1; Wang, Shaona1; Zheng, Shili1; Zhang, Yi1
2016
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume6Issue:48Pages:41878-41884
AbstractThe oxygen reduction reaction plays a crucial role in alkaline fuel cells. Herein, an alpha-Fe2O3 nanotube array material was fabricated via a facile two-step electrochemical anodization method and employed as an efficient ORR catalyst in alkaline media. Due to its highly ordered open top architecture, the alpha-Fe2O3 nanotube array electrode exhibits excellent ORR catalytic activity with an onset potential of -0.39 V (vs. Hg/HgO) and high current density of 6.95 mA cm(-2). Results show that the ORR exhibits quasi-reversible diffusion-controlled reaction characteristics and a well-defined four electron pathway. Moreover, as the crystalline structure transforms from alpha-Fe2O3 to Fe3O4 or as the alkaline concentration increases, the ORR activity is disturbed and the electron transfer number decreases. The as-prepared electrodes possess favorable alkaline tolerance as indicated from their chronoamperometric curves and Raman spectra. Accordingly, this novel alpha-Fe2O3 nanotube array material can be employed as efficient and low cost non-noble metal electrodes for electrochemical energy applications.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c6ra06422a
Indexed BySCI
Language英语
WOS KeywordMETHANOL FUEL-CELLS ; HIGH-PERFORMANCE ; EFFICIENT ELECTROCATALYSTS ; HEMATITE ALPHA-FE2O3 ; CR(III) OXIDATION ; STAINLESS-STEEL ; KOH SOLUTIONS ; IRON ; CATALYSTS ; GRAPHENE
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationNational Basic Research Program of China (973 Program)(2013CB632601) ; Hundred Talent Program
WOS IDWOS:000375445500027
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21036
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xue, Yudong,Jin, Wei,Du, Hao,et al. Tuning alpha-Fe2O3 nanotube arrays for the oxygen reduction reaction in alkaline media[J]. RSC ADVANCES,2016,6(48):41878-41884.
APA Xue, Yudong,Jin, Wei,Du, Hao,Wang, Shaona,Zheng, Shili,&Zhang, Yi.(2016).Tuning alpha-Fe2O3 nanotube arrays for the oxygen reduction reaction in alkaline media.RSC ADVANCES,6(48),41878-41884.
MLA Xue, Yudong,et al."Tuning alpha-Fe2O3 nanotube arrays for the oxygen reduction reaction in alkaline media".RSC ADVANCES 6.48(2016):41878-41884.
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