| 硫酸溶液中电化学改性石墨电极对Fe（3＋）/Fe（2＋）的电催化性能与准电容特性 | |
| Alternative Title | Electrocatalytic Performance and Pseudo-Capacitive Characteristics of Modified Graphite Electrode with Fe（3＋） /Fe（2＋） in H_2 SO_4 Solution |
| 孙亚萍; 范新庄; 芦永红; 徐海波 | |
| 2012 | |
| Source Publication | 物理化学学报
 |
| ISSN | 1000-6818 |
| Volume | 28.0Issue:003Pages:603-608 |
| Abstract | 通过循环伏安（CV）、恒电流充放电和电化学阻抗谱（EIS）等测试方法,研究了电化学改性石墨电极对硫酸溶液中Fe3＋/Fe2＋的电催化性能与准电容特性.结果表明：由于电化学改性石墨电极表面存在大量的含氧活性官能团,使其对Fe3＋/Fe2＋的氧化还原反应具有极高的电催化性能,并具有可逆反应过程特征.在含有0.5mo·lL-1Fe3＋＋0.5mo·lL-1Fe2＋的2.0mo·lL-1H2SO4溶液中,其表观面积比电容是不含铁离子硫酸溶液的1.808倍,达到2.157F·cm-2;同时,铁离子浓度的增大也能够进一步提高其电容量.Fe3＋/Fe2＋电对的加入增加了充放电时间,有效提高了电化学电容器（EC）的电容存储容量和高功率特性.电化学阻抗谱测试同样证实体系具有明显的电容特性.因此,可以利用电化学改性石墨电极表面的含氧活性官能团和溶液中Fe3＋/Fe2＋的氧化还原特性来共同储存和释放能量. |
| Other Abstract | The electrocatalytic performance and pseudocapacitive characteristics of a modified graphite electrode（MGE）with Fe 3＋ /Fe 2＋ in H 2 SO 4 solution were studied by cyclic voltammetry（CV）,constant current charge-discharge measurements,and electrochemical impedance spectroscopy（EIS）.The results showed that the MGE had high electrocatalytic activity and good reversible characteristics for the redox reaction of Fe 3＋ /Fe 2＋ because of a large quantity of oxygen-containing functional groups on the MGE surface.The apparent area-specific capacitance of the MGE in 2.0 mol·L -1 H 2 SO 4 solution containing 0.5 mol·L -1 Fe 3＋ and 0.5 mo·lL -1 Fe 2＋ reached 2.157 F·cm -2 ,which was almost double that in 2.0 mo·lL -1 H 2 SO 4 without Fe 3＋ / Fe 2＋ .Meanwhile,increasing the concentration of iron ions increased the capacitance of the MGE.The addition of Fe 3＋ /Fe 2＋ made the charge-discharge curves more symmetric and change more slowly,which increases the charge-discharge time,and effectively improves the capacitive energy storage and high power performance for an electrochemical capacitor（EC）.The obvious capacitive characteristics were confirmed by EIS,and are attributed to the oxygen-containing functional groups on the MGE and the Faraday redox reaction of Fe 3＋ /Fe 2＋ in the thin electrolyte layer.Therefore,the oxygen-containing functional groups on the MGE surface and redox reaction of Fe 3＋ /Fe 2＋ can be used together for energy storage and release. |
| Keyword | 电化学改性石墨电极 铁离子 电催化 电化学电容 准电容 |
| Indexed By | CSCD |
| Language | 中文 |
| CSCD ID | CSCD:4460120 |
| Citation statistics |
Cited Times:1[CSCD]
[CSCD Record]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/153823 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | 孙亚萍,范新庄,芦永红,等. 硫酸溶液中电化学改性石墨电极对Fe（3＋）/Fe（2＋）的电催化性能与准电容特性[J]. 物理化学学报,2012,28.0(003):603-608. |
| APA | 孙亚萍,范新庄,芦永红,&徐海波.(2012).硫酸溶液中电化学改性石墨电极对Fe（3＋）/Fe（2＋）的电催化性能与准电容特性.物理化学学报,28.0(003),603-608. |
| MLA | 孙亚萍,et al."硫酸溶液中电化学改性石墨电极对Fe（3＋）/Fe（2＋）的电催化性能与准电容特性".物理化学学报 28.0.003(2012):603-608. |
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