We have developed a highly active nanostructured iridium catalyst for anodes of proton exchange membrane (PEM) electrolysis. Clusters of nanosized crystallites are obtained by reducing surfactant-stabilized IrCl3 in water-free conditions. The catalyst shows a five-fold higher activity towards oxygen evolution reaction (OER) than commercial Ir-black. The improved kinetics of the catalyst are ref...

S.Ghaemi , S.M.Moghaddas-Tafreshi K.N.Toosi University of Technology, Tehran, Iran Tel. ++98-09125264952, E-mail: [email protected] , [email protected] Abstract This paper presents an optimized design of grid-connected multi sources hybrid power system includes sources like, photovoltaic array, Electrolyzer, Fuel cell, H2-Tank and grid electricity based on Genetic Algorithm (GA). In...

Strongly alkaline electrolyzed water (SAEW) was prepared by electrolysis of tap water in a laboratory-made water electrolyzer. The pH of stored SAEW was stable for more than one month. The hardness of the electrolyzed water was 30% lower and the Na(+) concentration was 18% higher than those of the tap water. Silkworm cocoon shells were boiled in pH 11.50 SAEW at a ratio of 1∶40∼80 (W/V) for 20 ...

Recent year’s renewable energy sources plays important role in power generation system. Due to intermittent nature of renewable sources such as wind and solar, the energy storage systems (ESS) are required in renewable power generating systems. This paper deals with power management of the ESS based on hydrogen storage (electrolyzer, hydrogen tank, fuel cell) and battery integrated in hybrid re...

In this study, a potential ilmenite cathode material Ni0.9TiO3 is designed for efficient CO2 electrolysis in an oxide-ion-conducting solid-oxide electrolyzer. Spatially confined catalysis has been successfully achieved to substantially improve cathode activity by in situ growth of catalytically active nickel nanoparticles on a ceramic skeleton. The combined analysis of XRD, SEM, EDS, XPS, TGA a...

The direct synthesis of hydrogen peroxide from hydrogen and oxygen has been investigated in a capillary and a stacked microreactor, where Pd/C catalyst was coated on the silicone wall of a microchannel. In order to make the system of H2O2 production compact, a flow-through solid polymer electrolyte (SPE) electrolyzer, which was used for the evolution of H2 and O2 instead of gas cylinders, was c...

Abstract Extensive scaling of green hydrogen to meet net-zero targets would need the integration suitable resources, high renewable energy potential and achievement supporting techno-economic parameters establish viable projects. Herein, we propose a comprehensive four-tier framework based on specially designed open-source tools that build upon existing knowledge by providing (i) zoning filters...

A quasi-integrated high-temperature device composed of a solar cell and planar solid oxide electrolyzer for the generation H2 syngas was computationally evaluated. We assess feasibility provide design guidelines improved performance.

Green hydrogen will be an essential part of the future 100% sustainable energy and industry system. Up to one-third required solar wind electricity would eventually used for water electrolysis produce hydrogen, increasing cumulative electrolyzer capacity about 17 TWel by 2050. The key method applied in this research is a learning curve approach technologies, i.e., photovoltaics (PV) electrolyze...

This manuscript presents a thorough review of unitized regenerative fuel cells (URFCs) and their importance in Remote Area Power Supply (RAPS). In RAPS systems that utilize solar hydrogen power, which typically include photovoltaic modules, proton exchange membrane (PEM) electrolyzer, gas storage, PEM cells, the cost these is currently higher compared to conventional employ diesel generators or...