Front Cover: Hydrogen Storage and Release via Carbon Dioxide Hydrogenation to Formate Salts under High-Pressure Conditions with Ir Complex and Subsequent Formic Acid Dehydrogenation (ChemistryOpen 4/2025)

Abstract

To explore formic acid (FA) as a hydrogen carrier, the authors investigate hydrogen storage and production via formate salts generated from CO₂ reduction under supercritical conditions. Using developed Cp^*Ir catalysts, they achieve a formate concentration of 0.81 mol/L, which is converted to FA (0.50 mol/L) with a 96% yield via ion exchange. FA dehydrogenation exceeds 98% conversion, achieving >90% hydrogen recovery. These results highlight formate salts as an efficient hydrogen carrier for future energy applications. More details can be found in the Research Article by Hajime Kawanami, Seo Ono, and Ryoichi Kanega (DOI: 10.1002/open.202500032).