Electrochemical Cr(III) Oxidation and Mobilization by In Situ Generated Reactive Oxygen Species in Alkaline Solution
Xue, Yudong1,2; Jin, Wei1; Du, Hao1; Zheng, Shili1; Sun, Zhi1; Yan, Wenyi1; Zhang, Yi1
2016
发表期刊JOURNAL OF THE ELECTROCHEMICAL SOCIETY
ISSN0013-4651
卷号163期号:8页码:H684-H689
摘要A novel electrochemical chromium oxidation strategy by in situ electro-generated reactive oxygen species was developed in this study. Activated multi-walled carbon nanotubesmodified electrode was employed to produce H2O2 via two-electron-pathway oxygen reduction reaction with onset potential of -0.06 V (vs Hg/HgO) and peak current density of 1.54 mA . cm(-2). The H2O2 formation was confirmed by selective luminescent probes with UV-vis spectroscopy, and the Cr(III) can be efficiently oxidized by the as formed H2O2. Interestingly, center dot OH can also be obtained by the Cr(III)-induced Fenton-like reaction, and offer further oxidative stress to enhance the Cr(III) oxidation. Consequently, a significantly enhanced Cr(III) conversion of 98.5 +/- 1.0% was achieved in this indirect oxidation as compared to 29.8 +/- 1.3% in the corresponding direct electrochemical oxidation. Besides, indirect pathway exhibited a considerable improvement for the Cr(III) oligomers oxidation (from 17.6 +/- 1.0% to 93.5 +/- 1.5%), indicating a potential solution to overcome the polymerization bottleneck of Cr(III) oxidation. Moreover, the electrolysis current well maintained the original value after stability test, suggesting favorable alkaline tolerance. The proposed method provided a cleaner approach for Cr(III) oxidative mobilization in alkaline media, and new insight on the redox cycle of electro-generated reactive oxygen species. (C) 2016 The Electrochemical Society. All rights reserved.
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
DOI10.1149/2.0781608jes
收录类别SCI
语种英语
关键词[WOS]GLASSY-CARBON ELECTRODE ; REDUCTION REACTION ; HYDROGEN-PEROXIDE ; NANOTUBE ARRAYS ; NAOH SOLUTIONS ; KOH SOLUTIONS ; CHROMITE ORE ; CR(VI) ; FENTON ; CATHODE
WOS研究方向Electrochemistry ; Materials Science
WOS类目Electrochemistry ; Materials Science, Coatings & Films
项目资助者National Basic Research Program of China (973 Program)(2013CB632601) ; Hundred Talents Program ; (KFA2015-239)
WOS记录号WOS:000379688000129
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21236
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, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, 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. Electrochemical Cr(III) Oxidation and Mobilization by In Situ Generated Reactive Oxygen Species in Alkaline Solution[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2016,163(8):H684-H689.
APA Xue, Yudong.,Jin, Wei.,Du, Hao.,Zheng, Shili.,Sun, Zhi.,...&Zhang, Yi.(2016).Electrochemical Cr(III) Oxidation and Mobilization by In Situ Generated Reactive Oxygen Species in Alkaline Solution.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,163(8),H684-H689.
MLA Xue, Yudong,et al."Electrochemical Cr(III) Oxidation and Mobilization by In Situ Generated Reactive Oxygen Species in Alkaline Solution".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 163.8(2016):H684-H689.
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