Another option which I don't see mentioned often is using formic acid to solve the volumetric capacity problem of storing hydrogen. Compared to ammonia and met

Another option which I don't see mentioned often is using formic acid to solve the volumetric capacity problem of storing hydrogen. Compared to ammonia and methanol, formic acid is less energy dense, but due to recent advances in catalysts it has the potential for simpler and smaller systems in less demanding circumstances (heat, pressure) [1]. The only party I know of that is trying to bring this to market is Dens [2], formed out of a student group at the University of Eindhoven [3]. Their website is a bit high on the rhetoric (including trying to coin "hydrozine"), and their mockups looks like, well, mockups, but there are real technology advances behind this, for example their trial with a city bus [4] (Dutch). [1] https://doi.org/10.1515/9783110536423-002 https://doi.org/10.1515/9783110536423-002 [2] https://dens.one/products/ https://dens.one/products/ [3] https://teamfast.nl/technology/ https://teamfast.nl/technology/ [4] https://web.archive.org/web/20200808210727/https://www.volkskrant.nl/nieuws-achtergrond/deze-stadsbus-in-eindhoven-rijdt-nu-op-mierenzuur-en-dat-is-behoorlijk-revolutionair~bb027b8b/ https://web.archive.org/web/20200808210727/https://www.volks...