尚宏利,田志锋.高铁酸钾电化学合成及其机理研究[J].表面技术,2007,36(6):53-55,58.
SHANG Hong-Ii,TIAN zhi-feng.The Electrochemical Preparation and Reaction Mechanism of Potassium Ferrate[J].Surface Technology,2007,36(6):53-55,58 |
| 高铁酸钾电化学合成及其机理研究 |
| The Electrochemical Preparation and Reaction Mechanism of Potassium Ferrate |
| 投稿时间：2007-10-22 修订日期：2007-12-10 |
| DOI： |
| 中文关键词: 高铁酸钾 电化学合成 阳极材料 电流密度 |
| 英文关键词:Potassium ferrate Electrochemical synthesis Anode material Current density |
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| 中文摘要: |
| 采用一种新的铁电极材料制备高铁酸钾，探讨了电解材料、电流密度、电解时间对电流效率的影响，最佳工艺条件为：16mol/L NaOH，t，=lOOrriA/crri2，温度350C，电解时间2.5h，高铁酸根物质的量浓度可达0.2869mol/L。初步研究了该反应的机理，结果表明此铁电极的循环伏安曲线与文献显著不同，尤其在- lOOmV( vs. HgO/Hg)附近出现明显的阳极氧化峰，可能是Fe(Ⅲ)向Fe(Ⅵ)转化的中间产物Fe03'[ Fe( V)]，此反应加速了Fe(Ⅵ)的生成，提高了高铁酸钾的时空效率。用XRD对高铁酸钾进行了表征，在20为30。的位置出现最强的衍射峰，衍射强度为670。 |
| 英文摘要: |
| In this study it reported an electrochemical generation of ferrate by dissolution of a new material. It discussed the influence of current density, electrolysis time and anode material on current efficiency. A ferrate solution about 286. 87 mol/dm3 was obtained under the optimum conditions : 16mol/L NaOH,J = lOOmA/cm2 , 35 0C , electrolysis duration ( 2. 5h) . The cyclic voltammograms ( CVs) of iron revealed a new anodic wave between - 1. 4 and 0. 7V versus HgO/Hg corresponding to ferrate( VI) production. The CV is strikingly different in that anodic wave with previous papers . where was emerging the peak which was related to the inter-mediator of electro-oxidation of Fe ( III ) species in concentration basic aqueous solution. It should be FeOj- ( Fe( V) species) . The crystalline structure and morphology of particles of the samples are investigated by X-ray diffraction ( XRD) |
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