二氧化铅修饰玻碳电极的镀膜/循环伏安法制备及电催化性能
采用镀膜/循环伏安法制备了PbO2修饰玻碳电极。在Pb（NO3）2溶液中,在-0.7V将Pb膜沉积在玻碳电极表面,然后在5mol/L NaOH溶液中以100mV/s速度在-1.0～1.0V循环伏安扫描20次,PbO2膜均匀沉积在玻碳电极表面。采用交流阻抗法监控电极修饰每一过程,环境扫描电镜表征电极表面形貌。探讨了PbO2膜的沉积机理及其电化学行为,表面活性位点覆盖量为7.5×10-10mol/cm2。PbO2修饰电极对H2O2电氧化表现出较高催化活性,起始氧化电位低至0.1V,考察了影响催化活性的因素。计时电流法测定H2O2（工作电位0.40V）,响应时间小于2s;线性范围为5.0×10-6～...
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| Published in | Fēnxī huàxué Vol. 38; no. 5; pp. 653 - 658 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
华南农业大学理学院应用化学系,广州,510642%河北工程技术高等专科学校,沧州,061001
2010
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-3820 |
| DOI | 10.3724/SP.J.1096.2010.00653 |
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| Abstract | 采用镀膜/循环伏安法制备了PbO2修饰玻碳电极。在Pb（NO3）2溶液中,在-0.7V将Pb膜沉积在玻碳电极表面,然后在5mol/L NaOH溶液中以100mV/s速度在-1.0～1.0V循环伏安扫描20次,PbO2膜均匀沉积在玻碳电极表面。采用交流阻抗法监控电极修饰每一过程,环境扫描电镜表征电极表面形貌。探讨了PbO2膜的沉积机理及其电化学行为,表面活性位点覆盖量为7.5×10-10mol/cm2。PbO2修饰电极对H2O2电氧化表现出较高催化活性,起始氧化电位低至0.1V,考察了影响催化活性的因素。计时电流法测定H2O2（工作电位0.40V）,响应时间小于2s;线性范围为5.0×10-6～5.5×10-4mol/L;检出限1.1×10-6mol/L（信噪比为3）。在实际水样中H2O2测定结果满意。电极在室温环境下储存30d,其催化活性基本不变。该修饰电极制备工艺简单、重现性良好、稳定性高。 |
|---|---|
| AbstractList | 采用镀膜/循环伏安法制备了PbO2修饰玻碳电极。在Pb（NO3）2溶液中,在-0.7V将Pb膜沉积在玻碳电极表面,然后在5mol/L NaOH溶液中以100mV/s速度在-1.0～1.0V循环伏安扫描20次,PbO2膜均匀沉积在玻碳电极表面。采用交流阻抗法监控电极修饰每一过程,环境扫描电镜表征电极表面形貌。探讨了PbO2膜的沉积机理及其电化学行为,表面活性位点覆盖量为7.5×10-10mol/cm2。PbO2修饰电极对H2O2电氧化表现出较高催化活性,起始氧化电位低至0.1V,考察了影响催化活性的因素。计时电流法测定H2O2（工作电位0.40V）,响应时间小于2s;线性范围为5.0×10-6～5.5×10-4mol/L;检出限1.1×10-6mol/L（信噪比为3）。在实际水样中H2O2测定结果满意。电极在室温环境下储存30d,其催化活性基本不变。该修饰电极制备工艺简单、重现性良好、稳定性高。 O65; 采用镀膜/循环伏安法制备了PbO2修饰玻碳电极.在Pb(NO3)2溶液中,在-0.7 V 将Pb膜沉积在玻碳电极表面,然后在5 mol/L NaOH溶液中以100 mV/s速度在-1.0～1.0 V循环伏安扫描20次,PbO2膜均匀沉积在玻碳电极表面.采用交流阻抗法监控电极修饰每一过程,环境扫描电镜表征电极表面形貌.探讨了PbO2膜的沉积机理及其电化学行为,表面活性位点覆盖量为7.5×10-10 mol/cm2.PbO2修饰电极对H2O2电氧化表现出较高催化活性,起始氧化电位低至0.1 V,考察了影响催化活性的因素.计时电流法测定H2O2 (工作电位0.40 V),响应时间小于2 s; 线性范围为5.0 ×10-6 ～ 5.5×10-4 mol/L;检出限1.1×10-6 mol/L (信噪比为3).在实际水样中H2O2测定结果满意.电极在室温环境下储存30 d,其催化活性基本不变.该修饰电极制备工艺简单、重现性良好、稳定性高. |
| Author | 刘有芹 乐文志 薛峰峰 颜芸 徐莉 |
| AuthorAffiliation | 华南农业大学理学院应用化学系,广州510642 河北工程技术高等专科学校,沧州061001 |
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| Author_FL | XUE Feng-Feng Yan Yun LE Wen-Zhi LIU You-Qin XU Li |
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| Publisher | 华南农业大学理学院应用化学系,广州,510642%河北工程技术高等专科学校,沧州,061001 |
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| Snippet | 采用镀膜/循环伏安法制备了PbO2修饰玻碳电极。在Pb（NO3）2溶液中,在-0.7V将Pb膜沉积在玻碳电极表面,然后在5mol/L NaOH溶液中以100mV/s速度在-1.0～1.0V循环伏安扫描20... O65; 采用镀膜/循环伏安法制备了PbO2修饰玻碳电极.在Pb(NO3)2溶液中,在-0.7 V 将Pb膜沉积在玻碳电极表面,然后在5 mol/L NaOH溶液中以100 mV/s速度在-1.0～1.0 V循环伏安扫... |
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| SubjectTerms | 二氧化铅 玻碳电极 电催化 镀膜/循环伏安法 |
| Title | 二氧化铅修饰玻碳电极的镀膜/循环伏安法制备及电催化性能 |
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