Power-to-hydrogen conversion via water electrolysis using renewable energy-sourced electricity has been considered for large-scale energy storage and grid balancing. Unfortunately, the state-of-the-art proton exchange membrane (PEM) electrolyzers are costly low in efficiency because of their use expensive iridium catalysts high overpotential to overcome barrier oxygen evolution reaction. Here, ...

The oxygen evolution reaction (OER) limits the energy efficiency of electrocatalytic systems due to high overpotential symptomatic poor kinetics; this problem worsens over time if performance OER electrocatalyst diminishes during operation. Here, a novel synthesis nanocrystalline Ni–Co–Se using ball milling at cryogenic temperature is reported. It discovered that, by anodizing structure OER, Se...

Energy storage is a promising approach to address the challenge of intermittent generation from renewables on the electric grid. In this work, we evaluate energy storage with a regenerative hydrogen fuel cell (RHFC) using net energy analysis. We examine the most widely installed RHFC configuration, containing an alkaline water electrolyzer and a PEM fuel cell. To compare RHFC’s to other storage...

Water electrolysis is one of the most promising approaches for producing hydrogen. However, it has been hindered by sluggishness anodic oxygen evolution reaction. In this work, we fabricated Ru-Co-Mn trimetallic alloy nanoparticles on N-doped carbon support (RuCoMn@NC) via pyrolysis-adsorption-pyrolysis process using ZIF-67 as a precursor. The RuCoMn@NC catalyst exhibited excellent electrocatal...

Today, the hydrogen is considered an essential element in speeding up energy transition and generate important environmental benefits. Not all same, though. The “green hydrogen”, which produced using renewable electrolysis to split water, really completely sustainable for stationary mobile applications. This paper focused on techno-economic analysis of on-site refueling station (HRS) green prod...

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.