Electrocatalytic activity of PANI/NG/CoPd towards ethanol oxidation

Nitrogen doped carbon supported catalyst for ethanol oxidation has been attractive field for energy researchers [1]. In this work, nanocomposite of polyaniline with nitrogen doped graphene was synthesized by chemical polymerization of aniline. This nanocomposite was used as support for palladium-cobalt (Pd-Co) nanocatalyst for the electrochemical oxidation reactions of ethanol in alkaline media. Electrooxidation reaction were evaluated using the cyclic voltammetry technique and the results are shown in Fig. 1. Looking at the figure, PANI/NG/CoPd electrode generates the most oxidation current density (Jf), at above 130 mA cm-2, among the PANI/NG/Pd and pure Pd electrodes. As to the backward maximum current density (Jb), the all samples have virtually the same level at around 20 mA cm-2. As mentioned before, the Jf/Jb is a factor revealing the resistance of electrocatalysts against the chemisorbed species during electrooxidatin reactions [2]. These values for the PANI/NG/CoPd, PANI/NG/Pd and pure Pd electrocatalysts are as follows: 5.4, 4.62 and 4.55. According to these ratios, the PANI/NG/CoPd proves that has competence in improving the ethanol electrooxidation process. It can be claimed that, based on these observations, the PANI/NG/CoPd modified CPE electrode can be used for ethanol electrooxidations.

کلیدواژه ها:

ANN ، polycyclic aromatic ، hydrocarbons ، solubility ، supercritical carbon dioxide