Maintaining a stable electrode potential is critical for patch-clamp measurements. The electrode potential of conventional patch electrode-holder assembly, where an Ag/AgCl wire is in direct contact with the patch pipette filling solution, is subject to drift if the pipette solution contains a low concentration of chloride ions (Cl-). We developed an agar bridge of 3 M KCl filled in a polyimide...

Abstract Gas diffusion electrode (GDE) setups have been recently introduced as a new experimental approach to test the performance of fuel cell catalysts under high mass transport conditions, while maintaining simplicity rotating disk (RDE) setups. In contrast RDE protocols, for investigations using GDE only few systematic studies performed. literature, different arrangements were demonstrated,...

Abstract Micropatterns applied to proton exchange membranes can improve the performance of polymer electrolyte fuel cells; however, mechanism underlying this improvement is yet be clarified. In study, a patterned membrane electrode assembly (MEA) was compared with flat one using electrochemical impedance spectroscopy and distribution relaxation time analysis. The micropattern positively affects...

Vehicle applications require efficient cold start ability and durability of polymer electrolyte membrane fuel cells (PEMFCs). In this study, various self-cold strategies including purging the PEMFC at shutdown using galvanostatic operation startup are proposed. The characteristics from −5°C a single cell experimentally investigated in situ on laboratory scale. amount cumulated charge transfer d...

In this paper, the effect of changes in thermal conductivity porous electrodes three coordinate directions on capability proton exchange membrane fuel cells is investigated basis current density versus voltammetry curves, and temperature distribution water-carrying capacity membrane. The results show that when cell discharge voltage PEMFC 0.3 V, Z-direction electrode has a greater performance t...

In arid coastal zones, direct seawater electrolysis appears particularly intriguing for green hydrogen production. State-of-the-art electrolyzers, however, show unsatisfactory performance and rely on large amounts of platinum-group metals (PGMs) in the electrodes or hidden as transport layer coatings. Herein, we report an asymmetric-feed electrolyzer design, which all cell components consist PG...

The characterization of performance and losses proton exchange membrane (PEM) anion (AEM) electrolysis cells is typically carried out by electrochemical impedance spectroscopy polarization curve measurements. With these common methods, lateral inhomogeneities, local degradation, or defects cannot be mapped. Lock-in thermography (LIT) offers the possibility mapping current flows electrical losse...

Accelerated degradation tests (ADTs) are commonly used to assess the durability of membrane electrode assembly (MEA) components consisting polymer electrolyte fuel cells (PEMFC) under harsh stress conditions, estimating their lifetime in actual use condition and uncovering vital mechanisms. ADTs apply mechanically, chemically, or thermally combined stressors efficiently investigate MEAs. Howeve...

This study investigated the oxidation of ascorbic acid (Vitamin C) using a platinum nanoparticle electrode coated with an iodine monolayer, called a modified electrode. The electrode were grown using the cyclic voltammetry technique and the electrochemical measurements were taken using the cyclic voltammetry and chronoamperometric technique. In the case of platinum nanoparticle electrode modifi...

The water management is a critical problem to overcome in the PEM fuel cell technology. Models play an important role in fuel cell development since they enable the understanding of the influence of different parameters on the cell performance allowing a systematic simulation, design and optimization of fuel cells systems. In this work, a model previously developed and validated, is used to pre...