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
发表期刊RSC ADVANCES
ISSN2046-2069
卷号6期号:48页码:41878-41884
摘要The 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.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
DOI10.1039/c6ra06422a
收录类别SCI
语种英语
关键词[WOS]METHANOL FUEL-CELLS ; HIGH-PERFORMANCE ; EFFICIENT ELECTROCATALYSTS ; HEMATITE ALPHA-FE2O3 ; CR(III) OXIDATION ; STAINLESS-STEEL ; KOH SOLUTIONS ; IRON ; CATALYSTS ; GRAPHENE
WOS研究方向Chemistry
WOS类目Chemistry, Multidisciplinary
项目资助者National Basic Research Program of China (973 Program)(2013CB632601) ; Hundred Talent Program
WOS记录号WOS:000375445500027
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21036
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.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
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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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