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电化学  2014 

Au/L-Met/GC电极的H2O2电催化氧化

DOI: 10.13208/j.electrochem.130725, PP. 146-149

Keywords: 金纳米粒子链,交联剂,电化学,催化氧化

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Abstract:

在无额外的添加剂和保护剂的情况下,以柠檬酸钠还原氯金酸制得链状金纳米粒子,使用扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察样品.层层自组装技术可将金纳米粒子自组装,并分别以L-甲硫氨酸(L-Methionine,L-Met)、硫脲(Thiourea,TU)、丙烯基硫脲(Allylthiourea,ATU)和聚乙烯吡咯烷酮(Polyvinylpyrrolidone,PVP)交联剂自组装于玻碳基底,即得金纳米粒子修饰电极.以[Fe(CN)6]3-/4-氧化还原电对为探针,考察该修饰电极的电化学性质.Au/L-Met/GC电极有最佳电化学性能,循环伏安曲线和计时电流曲线测试表明,Au/L-Met/GC电极的H2O2电催化氧化有较高的灵敏度,线性范围2×10-7~3×10-3mol·L-1,检出限6.67×10-8mol·L-1.

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