Proton exchange membrane fuel cells (PEMFCs) have been recognized as a promising power generation source for wide range of automotive, stationary, and portable electronic applications. However, the durability PEMFCs remains one key barriers to their commercialization. The electrode assembly (MEA) central part PEMFC, which consists proton with catalyst layer (CL) gas diffusion (GDL) on each side...

Direct Catalyst Coating In article 2200332, Severin Vierrath and co-workers demonstrate the fabrication process of anion-exchange membrane water electrolyzer cells in a simplified way. The catalyst layers (black) are directly deposited onto anion exchange (yellow) via bar-coating. molecules split into hydrogen (white) oxygen (red). Cover illustration by Luca Bohn.

Although proton-exchange membrane fuel cells (PEMFC) are considered as a safe and clean energy technology, aging phenomena of the membrane-electrode assembly (MEA), more particularly membrane, still restrict PEMFC lifetime. In this paper, ex-situ accelerated chemical degradation – via Fenton's reagents exposure reinforced Nafion™ XL is performed in order to investigate impact on structure prope...

BACKGROUND Germinal Vesicle (GV) stage mouse oocytes in first meiotic prophase exhibit highly active HCO(3)(-)/Cl(-) exchange--a class of transport nearly ubiquitously involved in regulation of intracellular pH and cell volume. During meiosis, however, oocyte HCO(3)(-)/Cl(-) exchange becomes inactivated during first metaphase (MI), remains inactive in second metaphase (MII), and is reactivated ...