PdxAuy loaded reduced graphene oxide on nickel foam(PAGN) composite for high efficient methanol and ethanol electrooxidation

摘要: Abstract PdxAuy loaded reduced graphene oxide on nickel foam(PAGN) were synthesized in a simple and green way of spontaneous reduction. Different characterization methods, including XRD, Raman spectra, SEM, TEM XPS, used to investigated the chemical composition, morphology structure composites. The catalytic activity prepared electrodes estimated by means cyclic voltammetry(CV), chronoamperometry(CA), electrochemical impedance spectroscopy(EIS). Graphene was firstly Ni foam directly, then noble metal(Pd Au) ions supported surface substrate. By varying palladium/gold mole ratios into 4:1, 5:1 6:1, optimized P5A1GN anode with ratio is obtained terms best performance among all these anodes. electrode exhibited respectively maximum peak current density 0.72 1.18A cm−2mg−1PdAu methanol ethanol electrooxidation, which only 1% 7% after long-term CV scanning test 1000 cycles. better overall stability oxidation ascribed improvement properties, optimization Pd electronic properties tuned Au element as well cocatalysis Au.