Electrocatalytic activity of bamboo-structured carbon nanotubes paste electrode toward hydrogen peroxide

In this report, we describe the finding that bamboo-structured carbon nanotubes (CNT) showed superior electrocatalytic activity toward hydrogen peroxide. The slope of the calibration curve for hydrogen peroxide obtained with the bamboo-structured CNT paste electrode was more than 20 times as large as the slopes obtained with hollow-structured CNT paste and glassy carbon electrodes at an operating potential of -0.1 V, with no interfering reactions. Incorporation of glucose oxidase within the bamboo-structured CNT paste electrode allows the selective detection of glucose in the presence of common interferents without using any permselective membranes. This excellent ability of the bamboo-structured CNT paste electrode toward hydrogen peroxide is applicable to the development of other enzymatic biosensors.