Carbon nanotubes coated with platinum nanoparticles as anode of biofuel cell--颗粒学报PARTICUOLOGY

Zhang, J., Zhu, Y., Chen, C., Yang, X., & Li, C. (2012). Carbon nanotubes coated with platinum nanoparticles as anode of biofuel cell. Particuology, 10(4), 450–455. https://doi.org/10.1016/j.partic.2011.11.014

Carbon nanotubes coated with platinum nanoparticles as anode of biofuel cell

Jianmei Zhang ^{a b}, Yihua Zhu ^a *, Cheng Chen ^a, Xiaoling Yang ^a, Chunzhong Li ^a

a Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
b Changzhou Institute of Technology, Changzhou 213002, China

10.1016/j.partic.2011.11.014

Volume 10, Issue 4, August 2012, Pages 450-455

Received 19 July 2011, Revised 3 November 2011, Accepted 13 November 2011, Available online 11 April 2012.

E-mail: yhzhu@ecust.edu.cn

Highlights

► CNTs coated with Pt-DENs and glucose oxidase are prepared via LbL self-assembly.

► The Pt-DENs/CNTs can enhance the electron transfer from enzyme centers to electrode.

► Enzymatic biofuel cells with Pt-DENs/CNTs modified anode show superior performance.

Abstract

A hybrid system of carbon nanotubes (CNTs) coated with poly (amidoamine) (PAMAM) dendrimer-encapsulated platinum nanoparticles (Pt-DENs) and glucose oxidase (GOx) was prepared through the layer-by-layer (LbL) self-assembly approach and then used as anode in enzyme-based biofuel cells (BFCs). The assembly process was monitored by ζ-potential measurement, and the as-resulted Pt-DENs/CNTs nanocomposites were characterized by transmission electron microscopy (TEM). The performance of electrodes modified by Pt-DENs/CNTs was also investigated by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). We found that the Pt-DENs/CNTs could enhance the electron transfer between the redox centers in enzyme and the electrode surfaces. Furthermore, by employing the Pt-DENs/CNTs modified electrodes as anode, the enzyme-based BFCs operated in a solution containing glucose generated an open-circuit voltage of approximately 640.0 mV and a maximum current density of about 90.0 μA/cm², suggesting that Pt-DENs/CNTs may serve as an alternative anode to previously used noble metals in BFC applications.

Graphical abstract

Keywords

Multiwall carbon nanotubes; Dendrimer-encapsulated platinum nanoparticles; Glucose oxidase; Biofuel cellsLbL self-assembly

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