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| 分子氧在金属配合物担载磷铝分子筛修饰玻碳电极上的电催化还原反应 | |
| 引用本文： | 张蓉,唐丽华,范彬彬,马静红,李瑞丰.分子氧在金属配合物担载磷铝分子筛修饰玻碳电极上的电催化还原反应[J].化学研究,2010,21(1):71-75,79. |
| 作者姓名： | 张蓉 唐丽华 范彬彬 马静红 李瑞丰 |
| 作者单位： | 1. 太原理工大学,化学化工学院,山西,太原,030024;太原理工大学,煤科学与技术教育部重点实验室,山西,太原,030024 2. 太原理工大学,化学化工学院,山西,太原,030024 3. 太原理工大学,煤科学与技术教育部重点实验室,山西,太原,030024 |
| 摘 要： | 采用循环伏安法研究了负载金属配合物MnSALEN(SALEN=N,N-双水杨醛缩乙二胺)的磷铝分子筛APO-5复合催化剂修饰玻碳电极在水溶液中对分子氧的还原反应的电催化行为.结果表明,氧气的还原峰电位随扫描速率的增大负移,Ep~lnv呈线性关系;其还原峰电流随扫描速率的增大而增强,ip~v1/2呈直线关系.这说明分子氧在修饰电极PS/MnSALEN/APO-5/GCE上的还原是扩散控制的.根据Ep~lnv和ip~v1/2的线性关系计算出中性电解质溶液中分子氧在此修饰电极上的还原反应的电子转移数n接近4.即氧气在此修饰电极上被还原为水. |
| 关 键 词： | 分子氧 金属配合物 磷铝分子筛 修饰玻碳电极 电催化还原 |
Electrocatalytic Reduction of Dioxygen at Glassy Carbon Electrode Modified with P-Al Molecular Sieve Loaded with Metal Complex |
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| ZHANG Rong,TANG Li-hua,FAN Bin-bin,MA Jing-hong,LI Rui-feng.Electrocatalytic Reduction of Dioxygen at Glassy Carbon Electrode Modified with P-Al Molecular Sieve Loaded with Metal Complex[J].Chemical Research,2010,21(1):71-75,79. | |
| Authors: | ZHANG Rong TANG Li-hua FAN Bin-bin MA Jing-hong LI Rui-feng |
| Institution: | 1.College of Chemistry and Chemical Engineering, Taiyuan University of Technology, raiyuan 030024, Shanxi, China 2. Key Laboratory of Ministry of Education of Coal Science and Technology, raiyuan University of Technology, Taiyuan 030024, Shanxi, China ) |
| Abstract: | The electrocatalytic reduction of dioxygen at glassy carbon electrode modified with metallic complex, MnSALEN loaded （SALEN refers to disalicylidene ethylenediamine） P-A1 molecular sieve, APO-5, was studied by cyclic voltarnmetry in aqueous solutions. It was found that the modified electrode exhibited a high electrocataytic activity and stability for oxygen reduction. The peak potentials of dioxygen reduction shifted negatively and peak current increased with increasing scanning rate. Moreover, the plots of Ep-1nv and ip-v^1/2 showed linear correlation, suggesting that the reduction of dioxygen at the modified electrode was controlled by diffusion. Besides, based on the slope of the straight line of ip - v^1/2, the electron numbers transferred in the reduction process of oxygen at the modified electrode were calculated to be about 4. This implies that oxygen was finally reduced to H2O at the modified electrode. |
| Keywords: | dioxygen metal complex P-A1 molecular sieve modified glassy carbon electrode electrocatalytic reduction |
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