Colak, Alper TolgaEren, TanjuYola, Mehmet LutfiBesli, ErdemSahin, OnurAtar, Necip2025-03-232025-03-2320160013-46511945-7111https://doi.org/10.1149/2.0911610jeshttps://hdl.handle.net/11486/5193A fuel cell is an electrochemical cell that converts a source fuel into an electrical current. It generates electricity inside a cell through reactions between a fuel and an oxidant, triggered in the presence of an electrolyte. Fuel cells have been attracting more and more attention in recent decades due to high-energy demands, fossil fuel depletions, and environmental pollution throughoutworld. Afacile and cost-effective catalysts have been developed on polyoxometalate (NaPWO) functionalized graphene quantum dots (GQDs) with several mono-metallic and bi-metallic nanoparticles such as platinum nanoparticles (PtNPs), palladium nanoparticles (PdNPs) and platinum-palladium nanoparticles (Pt-PdNPs). The successful synthesis of nanomaterials and the prepared glassy carbon electrode (GCE) surfaces were confirmed by transmission electron microscope (TEM), X-ray photo electron spectroscopy (XPS), scanning electron microscope (SEM), electrochemical impedance spectroscopy (EIS) and X-ray diffraction (XRD) method. According to TEM images, the average particle sizes of PtNPs and PdNPs were found to be approximately 20-30 nm. The Pt-PdNPs/NaPWO/GQDs also exhibited a higher peak current for methanol oxidation than those of comparable PdNPs/NaPWO/GQDs and PtNPs/NaPWO/GQDs, thus providing evidence for its higher electro-catalytic activity. (C) 2016 The Electrochemical Society. All rights reserved.eninfo:eu-repo/semantics/closedAccessVoltammetric SensorElectrocatalytic ActivityGold NanoparticlesCarbon NanotubesKegginOxideNanosensorOxidationCompoundElectrooxidationArticle16310F1237F124410.1149/2.0911610jes2-s2.0-84987723720Q1WOS:000389150900104Q2