https://www.whichcar.com.au/car-news/metal-bath-sponge-brings-hyd...

https://www.whichcar.com.au/car-news/metal-bath-sponge-brings-hydrogen-cars-closer


Where the sponge and new metal-organic framework differ, however, is in the size and number of pores - and it’s here that the numbers become staggering.Just a single gram of the aluminium-based substance (about the same weight as a paperclip) has a volume of nearly four cubic centimetres so it’s incredibly light but, more importantly, it has a huge surface area.If all the internal pores were flattened out, the same cube of material would cover about one and a half football fields. It’s that vast surface area that allows the special framework to grab hold of gasses including hydrogen without other special conditions involved.