| Title | Electrochemical behavior of Fe(VI)-Fe(III) system in concentrated NaOH solution |
| Authors | Zhang, Cun Zhong Deng, HongBo Zhao, Tingting Wu, Feng Liu, Wei Cai, Shengmin Yang, Kai Sharma, Virender K. |
| Affiliation | Beijing Institute of Technology, School of Chemical Engineering and Environment, Beijing 100081, China National Development Center of Hi-Tech Green Materials, Beijing 100081, China School of Environment Sciences and Engineering, Sun Yat-Sen University, Guangzhou 510275, China College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China Chemistry Department, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL 32901, United States |
| Issue Date | 2008 |
| Citation | 985(81-93). |
| Abstract | The electrochemical behavior of a Fe(VI)/Fe(III) system was investigated with both a SnO2-Sb2O3/electrode and a powder microelectrode. Results showed that ferrite ion (FeO2-), formed in solution and solid phase, was a suitable Fe(III) species for the generation of FeO42- and for construction of a Fe(VI)/Fe(III) redox system under strong basic conditions. Solid ferrite was made by the method of molten melting a mixture of Fe2O3 and NaOH at 973 ?? 2K. The product was confirmed to be NaFeO2 by X-ray diffraction (XRD) measurements. Ferrate (Fe(VI)) was also synthesized from ferrite (solid), Fe(OH)3, and Fe2O3 using an hypochlorite oxidation method. In this method, it was demonstrated that ferrite was the most suitable material among these Fe(III) compounds for ferrate synthesis. Results also indicated: A) FeO42-/FeO2 - is a suitable redox system under studied experimental conditions, b) rate and the reversibility of the redox reaction between FeO42 and FeO2 were promoted markedly with the increase of temperature from 293 K to 333 K, c) the electro-oxidation of Fe02' is a fast two-electron transfer reaction on both the SnO2-Sb2O3/Ti electrode and the NaFeO2 powder microelectrode, and d) open-hearth dust of iron and steel industry could be used as a promising and valuable raw material for ferrate synthesis. ? 2008 American Chemical Society. |
| URI | http://hdl.handle.net/20.500.11897/263159 |
| DOI | 10.1021/bk-2008-0985.ch004 |
| Indexed | EI |
| Appears in Collections: | å å¦ä¸ å å å·¥ç¨ å¦é ¢ |
