Catalytic behavior of a palladium doped binder free paper based cobalt electrode in electroreduction of hydrogen peroxide
Abstract
A piece of flexible and conductive A4 paper is prepared by coating a layer of graphite with a normal 8B pencil. Then, Co nano-plates and Pd are assembled by a simple electrodeposition and chemical-reduction methods on the surface of the electrified paper, respectively. The as-prepared paper substrate/graphite-Co film-Pd (PG-CoPd) electrode is characterized by scanning electron microscopy equipped with energy dispersive X-ray spectrometer, transmission electron microscope and X-ray diffractometer. The catalytic activity of the PG-CoPd electrode for H2O2 electroreduction is investigated by means of cyclic voltammetry and chronoamperometry. The preparation process of the PG-CoPd electrode does not use any binder and it exhibits a three dimensional (3D) nano structure, high stability and good electric conductivity. The mass of the Pd in PG-CoPd is about 0.0535 mg cm-2 and the reduction current density reaches to -4.30 A cm-2 mg-1 in 1 mol dm-3 NaOH and 1.4 mol dm-3 H2O2 at -0.5 V, which is higher than our previous reports of Au/Pd modified Co electrode.
- Publication:
-
Journal of Power Sources
- Pub Date:
- January 2015
- DOI:
- 10.1016/j.jpowsour.2014.10.014
- Bibcode:
- 2015JPS...273.1142Z
- Keywords:
-
- Flexible;
- Nano-plate;
- Binder free;
- Hydrogen peroxide electroreduction