Proton exchange membrane fuel cell is essentially utilized to generate energy with zero emission. There are many drawbacks in PEMFC, such as the mal-distribution of reactants, water management between catalyst layer and GDL, mass transport issue reactants. Flow field design parameters can overcome these problems improve performance. Where flow an essential element cell, it designed provide requ...

Combining molecular beam methods and angular resolved mass spectrometry, we have studied the angular distribution of desorbing products during CO oxidation on a planar Pd/silica supported model catalyst. The model catalyst was prepared by means of electron beam lithography, allowing individual control of particle size, position, and aspect ratio, and was characterized by atomic force microscopy...

Today, the scenario of a well-controlled large-scale production of nanoparticles is a very important aspect in nanotechnology. The present work aims at the investigation of different engineering aspects on the production of nanoparticles using microemulsions, which lead to possible process control. Prior to the precipitation process, this study explains that the phase behaviour of the ternary a...

We study anomalous kinetics associated with incomplete mixing for a bimolecular irreversible kinetic reaction where the underlying transport of reactants is governed by a fractional dispersion equation. As has been previously shown, we demonstrate that at late times incomplete mixing effects dominate and the decay of reactants follows a fundamentally different scaling comparing to the idealized...

Introduction A Chemical reaction is a process that results in the conversion of chemical substances. The substance or substances initially involved in a chemical reaction are called reactants. These reactants are characterized by a chemical change and they yield one or more products. These products are generally different from the original reactants. Chemical reactions may be of different natur...

A low-performance fuel cell significantly hinders the application and commercialization of technology. Computational fluid dynamics modeling could predict evaluate performance a proton exchange membrane (PEMFC) with less time consumption cost-effectiveness. PEMFC is influenced by distribution reactants, water, heat, current density. An uneven reactants leads to localization density that produce...

In this work, a one-dimensional mathematical model of direct formate fuel cells is developed. The present involves mass/charge transport and electrochemical reactions. Compared to the previous models, incorporates ion migration considers anode catalyst layer thickness, so that not only capable predicting polarization curves evaluate cell performance, but also able give more in-depth insights in...

to simulate a new economical architecture for pem fuel cell and investigate the effectiveness of the introduced structure on the performance, computational fluid dynamics (cfd) code is used to solve the equations for a single domain of the cell namely: the flow field, the mass conservation, the energy conservation, the species transport, and the electric/ionic fields under the assumptions of st...

The reactions of the p-tolyl radical with allene-d4 and methylacetylene-d4 as well as of the p-tolyl-d7 radical with methylacetylene-d1 and methylacetylene-d3 were carried out under single collision conditions at collision energies of 44-48 kJ mol(-1) and combined with electronic structure and statistical (RRKM) calculations. Our experimental results indicated that the reactions of p-tolyl with...

ABSTRACT Gas diffusion electrodes (GDEs) mediate the transport of reactants, products and electrons for electrocatalytic CO2 reduction reaction (CO2RR) in membrane electrode assemblies. The random distribution ionomer, added by traditional physical mixing method, catalyst layer GDEs affects ions CO2. Such a phenomenon results elevated cell voltage decaying selectivity at high current densities....