【摘 要】
：
Due to the high reactivity of hydrogen peroxide (H2O2),the electrochemical process producing H2O2 needed a real-time detection.In this research,scanning electrochemical microscopy combined with surfac
【机 构】
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Institute of Surface Analysis and Biosensing,College of Chemistry and Chemical Engineering,Central S
【出 处】
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The 6th International Conference on Separation and Technolog
论文部分内容阅读
Due to the high reactivity of hydrogen peroxide (H2O2),the electrochemical process producing H2O2 needed a real-time detection.In this research,scanning electrochemical microscopy combined with surface plcasmon resonance (SECM-SPR)[1-2] was used in the in-situ real-time generation and determination of H2O2 during electrochemical oxygen reduction (ORR).H2O2 produced during electroreduction of oxygen on the 25μro SECM Pt tip,then diffused to the SPR substrate and reacted with the self-assembled Fc(CH2)6SH monolayer on the substrate,the oxidation of Fc(CH2)6SH lead to a detectable SPR response.Using the method,the efficiency of H2O2 produced during ORR was estimated to 17.9%.Comparing to commonly used methods for detection of H2O2 such as titration,chemiluminescence,and fluorescence spectrophotometry,the combined technique could greatly improve the detection precision by minimizing the possible side reaction.
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