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A binder-free paper electrode with high performance for NaBH4 oxidation

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Abstract

In this study, a piece of filter paper with good flexibility and hygroscopicity was used to support catalysts after a pencil drawing process. A layer of thin Ni film was deposited on the surface of the conductive graphite layer using an electrochemical method at a negative potential. Pd nanoparticles with high electrocatalytic activity for NaBH4 oxidation were introduced by immersing the Ni film-graphite-filter paper (NGF) in PdCl2 solution to obtain a Pd-NGF (PNGF) electrode. The morphology and phase structure of PNGF were characterized using scanning electron microscopy (SEM) equipped with an energy dispersive X-ray spectrometer (EDS), transmission electron microscopy (TEM) and an X-ray diffractometer (XRD). The PNGF electrode was used as the anode in direct borohydride fuel cells (DBFCs), and the electrochemical properties for NaBH4 oxidation were determined by cyclic voltammetry (CV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS). The oxidation current density reaches 550 mA cm−2 at −0.4 V when the electrolyte contains 2 mol dm−3 NaOH and 0.10 mol dm−3 NaBH4.

Graphical abstract: A binder-free paper electrode with high performance for NaBH4 oxidation

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Publication details

The article was received on 16 Aug 2017, accepted on 13 Nov 2017 and first published on 14 Nov 2017


Article type: Paper
DOI: 10.1039/C7NJ03040A
Citation: New J. Chem., 2018, Advance Article
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    A binder-free paper electrode with high performance for NaBH4 oxidation

    D. Zhang, B. Wang, X. Yang, J. Zhang, Y. Liu and G. Wang, New J. Chem., 2018, Advance Article , DOI: 10.1039/C7NJ03040A

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