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Enhanced electrodeposition and separation of metallic Cr from soluble K2CrO4 on a liquid Zn cathode
Weng, Wei1,2; Wang, Zhi3; Guo, Zhancheng1; Jiao, Shuqiang1; Wang, Mingyong1
2020
Source PublicationJOURNAL OF ENERGY CHEMISTRY
ISSN2095-4956
Volume40Pages:204-211
AbstractCarbon contamination and the formation of low-valence oxides limit the preparation of refractory metals by molten salt electrolysis. In this paper, a liquid Zn cathode is adopted for the electrochemical reduction of soluble K2CrO4 to metallic Cr in CaCl2-KCl molten salt. It is found that CrO42- can be directly electrochemically reduced to Cr via a six-electron-transfer step and low-valence Cr oxides is hardly produced. The reduction rate is obviously increased from 16.7 mg(Cr) h(-1) cm(-2) on the solid Mo cathode to 58.7 mg(Cr) h(-1) cm(-2) on liquid Zn cathode. The electrodeposited Cr is distributed in liquid Zn cathode. Carbon contamination is effectively avoided due to the negligible solubility of carbon in the liquid Zn cathode. Furthermore, Cr can be effectively separated and enriched to the bottom of liquid Zn under super-gravity field, realizing the efficient acquisition of metallic Cr and recycling of liquid Zn. The method herein provides a promising route for the preparation of refractory metals with high-purity by molten salt electrolysis. (C) 2019 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
KeywordMolten salt electrolysis Liquid Zn cathode Carbon contamination K2CrO4 Metallic Cr
DOI10.1016/j.jechem.2019.04.021
Language英语
WOS KeywordELECTROCHEMICAL REDUCTION ; MOLTEN-SALT ; THERMODYNAMIC PROPERTIES ; EXTRACTION ; CORROSION ; GRAPHITE ; MELT ; DEOXIDATION ; NEODYMIUM ; TITANIUM
Funding ProjectNational Natural Science Foundation of China[51804221] ; National Natural Science Foundation of China[51474200] ; National Natural Science Foundation of China[91845113] ; China Postdoctoral Science Foundation[2018M642906] ; Fundamental Research Funds for the Central Universities[FRF-TP-18-010B1]
WOS Research AreaChemistry ; Energy & Fuels ; Engineering
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Energy & Fuels ; Engineering, Chemical
Funding OrganizationNational Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Fundamental Research Funds for the Central Universities
WOS IDWOS:000492696300026
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/38968
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Mingyong
Affiliation1.Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China
2.Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Weng, Wei,Wang, Zhi,Guo, Zhancheng,et al. Enhanced electrodeposition and separation of metallic Cr from soluble K2CrO4 on a liquid Zn cathode[J]. JOURNAL OF ENERGY CHEMISTRY,2020,40:204-211.
APA Weng, Wei,Wang, Zhi,Guo, Zhancheng,Jiao, Shuqiang,&Wang, Mingyong.(2020).Enhanced electrodeposition and separation of metallic Cr from soluble K2CrO4 on a liquid Zn cathode.JOURNAL OF ENERGY CHEMISTRY,40,204-211.
MLA Weng, Wei,et al."Enhanced electrodeposition and separation of metallic Cr from soluble K2CrO4 on a liquid Zn cathode".JOURNAL OF ENERGY CHEMISTRY 40(2020):204-211.
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