Direct hydrazine-hydrogen peroxide fuel cell using Ni@Pd/rGO as anodic electrocatalyst

A fuel cell is an electrochemical device that directly converts the chemical energy of fuels into electrical energy [1]. Different types of fuel cells have been developed over the last decades that direct hydrazine fuel cell is one of them [2]. In this study Ni@Pd on reduced graphene oxide (rGO) were synthesized using a two-step successive reduction method and characterized by field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). Hydrazine oxidation on Ni@Pd/rGO was studied by cyclic voltammetry (CV), chronoamperometry (CA), chronopotentiometry (CP) and electrochemical impedance microscopy (EIS). Hydrazine oxidation current density on Ni@Pd/rGO was 19722 A.g-1. Also, in single fuel cell studies, the influence of hydrazine concentration, hydrogen peroxide concentration and temperature on the cell performance was investigated. Maximum power density was obtained at 1 M N2H4, 2 M H2O2 and 60oC equal with 204.79 mWcm-2.