In this work, electrocatalyst with core-shell structure (Pd as core and Pt as shell on VulcanXC-72R) was synthesis. Not only this structure can reduce the amount of platinum but it also can increase the gas diffusion electrode (GDE) performance in cathode reaction (Oxygen Reduction Reaction or ORR) of polymer electrolyte membrane fuel cell (PEMFC). To this meaning, one series of electrocatalyst...

The new approach to solving diffusion problems using multidimensional integral equations (equations containing multiple integrals) proposed in Part 1 is used to address microelectrode problems with two types of electrode geometry: two-dimensional linear diffusion and cylindrical diffusion in a thin-layer cell. The electrochemical current transients and cyclic voltanunograms at a microband elect...

Dopamine  (DA)  and  uric  acid  (UA)  are  two  of  important bimolecular widely  circulated  in  body blood. Therefore, development of simple and rapid methods for simultaneous determination of them in  routine  analysis  has  a  great  significance  for  many  researchers. Therefore,  for  the  first  time, nanocomposite  of  graphene  (Gr)LaMnO3has  been  utilized  to  fabricate  the  new  ...

Modification of a glassy carbon (GC) electrode surface by adhered microparticles of zinc oxide (ZnO) using electrochemical performance of microparticles of ZnO/GC electrode shows excellent electrocatalytic activity towards the oxidation of ascorbic acid in 0.1 M KH2PO4 electrolyte solution by cyclic voltammetry (CV). This paper seeks to critically examine the modification of GC electrode with Z...

Approximation methods are often used in porous electrode models to eliminate the need to solve the local solid phase diffusion equation. These ethods include Duhamel’s superposition method, a diffusion length method and a polynomial approximation method which have long been used n the literature. The pseudo steady state (PSS) method is a method that has been used recently to develop a solution ...

Recent developments in nanofabrication have enabled fabrication of robust and reproducible nanoelectrodes with enhanced performance, when compared to microelectrodes. A hybrid electron beam/photolithography technique is shown that permits discrete gold nanowire electrode arrays to be routinely fabricated at reasonable cost. Fabricated devices include twelve gold nanowire working electrode array...

A robust, miniaturised electrochemical gas sensor for oxygen (O2) has been constructed using a commercially available Pt microarray thin-film electrode (MATFE) with a gellified electrolyte containing the room temperature ionic liquid (RTIL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C2mim][NTf2]) and poly(methyl methacrylate) (PMMA) in a 50 : 50 mass ratio. Diffusion coeffi...

The Front Cover shows a schematic representation of the oxygen reduction reaction on our gas diffusion electrode. composite catalyst is based Pt/C and non-stoichiometric CeO2. high hygroscopicity latter plays crucial role in optimizing water drainage cathode/Nafion interface, resulting considerable improvement proton conductivity Fuel Cell performances. design by Nicholas Carboni. More informat...

Due to the development of Electric Vehicles, technological developments related zinc-air batteries have gained importance and attention in recent years. The focus is mainly on challenges electrically rechargeable alkaline electrolytes. main objective this work develop a Zinc-Air Battery (ZnAB). Zinc considered for anode material. Stainless steel mesh with Nickel coating taken activated carbon p...

Large overpotential is one of the critical issues bifunctional air electrodes for metal–air secondary batteries and alkaline regenerative fuel cells. To overcome this problem, construction gas diffusion providing plenty amount reaction fields oxygen reduction evolution are necessary. In work, we investigate in by comparing resistances with different electrolyte solutions catalyst layer thicknes...