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| HO center dot selective cleavage Fe-S bond for FeS2 electrolysis in alkaline solution | |
| Zhang, Tong1,2; Wang, Yingqian1; Hu, Yingnan1,2; Wang, Zhi1; Chen, Jianhua3; Niu, Xiaopeng1,2; Li, Yuqiong3; Gong, Xuzhong1,2 | |
| 2019-05-20 | |
| Source Publication | ELECTROCHIMICA ACTA
 |
| ISSN | 0013-4686 |
| Volume | 306Pages:327-338 |
| Abstract | Electrochemical oxidation of pyrite is a critical process in the operation of the semiconductor solar cell and mineral electrolytic desulfurization. However, the mechanism of pyrite electrochemical oxidation is still controversial. In this work, electron spin resonance (ESR) and electrochemical characterizations indicated the presence of hydroxyl radical (HO center dot) and the increase in HO center dot concentration with time, verifying the importance of HO center dot on pyrite electrolysis. Fe(III) were increased on the surface of pyrite after electrolysis, demonstrating the HO center dot promoted oxidation of Fe(II) to form more Fe(III). The increased concentration in S2O32- in the solution indicated that the FeeS bond was more labile than the SeS bond during electrolysis process. DFT results further showed that the oxidation degree of Fe(II) determined the pathway of pyrite electrolysis. The pre-oxidation of Fe(II) to Fe(III) was prerequisite for the completed oxidation of S atom, resulting the selective breakage of FeeS bond. The results above revealed that the synergistic effects between HO center dot and pH of solution for FeS2 electrolysis. (c) 2019 Elsevier Ltd. All rights reserved. |
| Keyword | HO center dot FeS2 Completed oxidation Fe-S bond Selective cleavage |
| DOI | 10.1016/j.electacta.2019.03.114 |
| Language | 英语 |
| WOS Keyword | DOPED DIAMOND ANODE ; PYRITE OXIDATION ; ELECTROCHEMICAL OXIDATION ; HYDROXYL RADICALS ; DISSOLVED-OXYGEN ; IRON PYRITE ; SURFACE ; WATER ; SULFUR ; DESULFURIZATION |
| Funding Project | Natural Science Foundation of China[51474198] ; Natural Science Foundation of China[51422405] ; Natural Science Foundation of China[51764002] ; Natural Science Foundation of China[51574092] |
| WOS Research Area | Electrochemistry |
| WOS Subject | Electrochemistry |
| Funding Organization | Natural Science Foundation of China |
| WOS ID | WOS:000464148700035 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/28194 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Wang, Zhi; Chen, Jianhua; Gong, Xuzhong |
| Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China 3.Guangxi Univ, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, Sch Resources Environm & Mat, Nanning 530004, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Tong,Wang, Yingqian,Hu, Yingnan,et al. HO center dot selective cleavage Fe-S bond for FeS2 electrolysis in alkaline solution[J]. ELECTROCHIMICA ACTA,2019,306:327-338. |
| APA | Zhang, Tong.,Wang, Yingqian.,Hu, Yingnan.,Wang, Zhi.,Chen, Jianhua.,...&Gong, Xuzhong.(2019).HO center dot selective cleavage Fe-S bond for FeS2 electrolysis in alkaline solution.ELECTROCHIMICA ACTA,306,327-338. |
| MLA | Zhang, Tong,et al."HO center dot selective cleavage Fe-S bond for FeS2 electrolysis in alkaline solution".ELECTROCHIMICA ACTA 306(2019):327-338. |
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