Efficient One-Step Synthesis of Gold Nanoparticles Supported on Reduced Graphene Oxide for Methanol Oxidation Reaction Catalyst in Alkaline Electrolyte

Journal of nano research, Journal Year: 2025, Volume and Issue: 87, P. 49 - 63

Published: March 26, 2025

This study explores the utility of reduced graphene oxide (rGO) as a support material for gold nanoparticles (AuNPs) synthesized via an economically efficient and environmentally friendly electrochemical deposition method conducted at room temperature. Employing chronoamperometry (CA) method, we successfully synthesize AuNPs in aqueous solutions without additional stabilizing agents. We investigate influence substrate electrodeposition duration on growth AuNPs, indium tin glass substrates rGO, with durations comparison. research highlights straightforward rapid one-step synthesis medium correlation between Au particle size electrocatalytic performance. evaluate performance rGO-supported context methanol oxidation reaction (MOR) using cyclic voltammetry alkaline electrolyte. Notably, supported by featuring average 46 nm, exhibit superior compared to their counterparts 165 nm when employed catalysts MOR. is characterized 15 mV more negative potential (54 mv 39 mV) over 2.5 times higher peak current (0.064 mA 0.025 mA), underscoring efficiency electrocatalysts

Language: Английский

Innovations in graphene-based electrochemical biosensors in healthcare applications

Microchimica Acta, Journal Year: 2025, Volume and Issue: 192(5)

Published: April 9, 2025

Abstract The isolation of a single atomic layer graphite, known as graphene, marked fundamental moment that transformed the field materials science. Graphene-based nanomaterials are recognized for their superior biocompatibility compared with many other types nanomaterials. Moreover, one main reasons growing interest in graphene is its potential applications emerging technologies. Its key characteristics, including high electrical conductivity, excellent intrinsic charge carrier mobility, optical transparency, substantial specific surface area, and remarkable mechanical flexibility, position it an ideal candidate solar cells touch screens. durability further establishes strong contender developing robust materials. To date, variety methods, such traditional spectroscopic techniques chromatographic approaches, have been developed detecting biomolecules, drugs, heavy metals. Electrochemical portability, selectivity, impressive sensitivity, offer considerable convenience both patients professionals point-of-care diagnostics. Recent advancements significantly improved capacity rapid accurate detection analytes trace amounts, providing benefits biosensor technology. Additionally, integration nanotechnology has markedly enhanced sensitivity selectivity electrochemical sensors, yielding results. Innovations point-of-care, lab-on-a-chip, implantable devices, wearable sensors discussed this review. Graphical abstract

Language: Английский

Advances in laser-induced graphene for environmental and biochemical analysis: Synthesis, functionalization, and applications

Microchemical Journal, Journal Year: 2025, Volume and Issue: unknown, P. 113713 - 113713

Published: April 1, 2025

Language: Английский