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Electrocatalytic Generation and Spectroscopic Investigation of Reactive Oxygen Species in Alkaline Media
Xue Yu-dong1,2; Zheng Shi-li1; Zhang Yi1; Jin Wei1
2018-07-01
Source PublicationSPECTROSCOPY AND SPECTRAL ANALYSIS
ISSN1000-0593
Volume38Issue:7Pages:2044-2047
AbstractLiquid oxidation techniques by sub-molten salt media for the effective extraction of amphoteric metal from refractory minerals have been developed. An innovative synergistic process by electrochemical oxidation and reactive oxygen species (ROS) intensify was further proposed. In the present study, the mechanism of ROS formation and conversion in the electrocatalytic process was systematically revealed by UV-Vis spectra and electron spin resonance (ESR) measurement. The reactive species were in-situ generated by two-electron oxygen reduction reaction (ORR) at the cathode surface. The center dot OH was produced from the self-induced reaction between amphoteric metal ions and HO2-, which was beneficial for the oxidation dissolution process and considered as an alkaline electrochemical advanced oxidation process. The catalytic oxidation process of low-valance amphoteric metal oxides (Cr2O3 and V2O3) by ROS was illustrated by UV-Vis spectra. Furthermore, V2O3 was more easily dissolved than Cr2O3 with the presence of ROS according to the thermodynamic data of standard free energy change. The center dot OH in the electrochemical system was detected by the ESR technique. The ESR signal of center dot OH catalyzed by V2O3 was more remarkable than that of Cr2O3. The quenching experiment result proved that center dot OH with high standard oxidation potential played a promoting role in the liquid oxidation process. The present investigation provides further standing for the electrochemical oxidative dissolution in alkaline media.
KeywordReactive oxygen species Electrocatalysis Alkaline media Electron spin resonance Hydroxyl radical
DOI10.3964/j.issn.1000-0593(2018)07-2044-04
Language英语
WOS KeywordH2O2
WOS Research AreaSpectroscopy
WOS SubjectSpectroscopy
WOS IDWOS:000439671600010
PublisherOFFICE SPECTROSCOPY & SPECTRAL ANALYSIS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/25442
Collection中国科学院过程工程研究所
Corresponding AuthorZheng Shi-li; Jin Wei
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst 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 Yu-dong,Zheng Shi-li,Zhang Yi,et al. Electrocatalytic Generation and Spectroscopic Investigation of Reactive Oxygen Species in Alkaline Media[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2018,38(7):2044-2047.
APA Xue Yu-dong,Zheng Shi-li,Zhang Yi,&Jin Wei.(2018).Electrocatalytic Generation and Spectroscopic Investigation of Reactive Oxygen Species in Alkaline Media.SPECTROSCOPY AND SPECTRAL ANALYSIS,38(7),2044-2047.
MLA Xue Yu-dong,et al."Electrocatalytic Generation and Spectroscopic Investigation of Reactive Oxygen Species in Alkaline Media".SPECTROSCOPY AND SPECTRAL ANALYSIS 38.7(2018):2044-2047.
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