The transition to a hydrogen economic system is a should in any carbon-emissions-free future situation. One sensible problem of this transition is the security concern when utilizing massive quantities of compressed or liquid hydrogen. This may be averted through the use of strong salts, corresponding to potassium borohydride (KBH4), as hydrogen carriers for industrial functions. Many metals and oxides catalyse this response, however the problem lies within the catalysts’ stability. The mixture of excessive pH and quick hydrogen era causes mechanical degradation. Right here we present that chitosan, an considerable biobased polymer, is a sensible and efficient catalyst help for KBH hydrolysis. We type chitosan spheres that encapsulate the energetic cobalt catalyst species, all performed underneath ambient circumstances. They continue to be secure on the excessive response pH, and swell and shrink with the formation of hydrogen. The catalyst may be reused a number of instances in each batch and steady modes. A steady check utilizing a 5 w/w% stabilised gasoline answer and solely 250 mg catalyst generated hydrogen at a median charge of 32 mL min−1 over 48 h. Learning the response kinetics utilizing high-precision measurements, we observe a kink within the Arrhenius plot, reflecting a bodily change within the system (the swelling of the spheres) moderately than a change in mechanism. Comparability research present that the versatile biopolymer help outperforms traditional porous oxide helps corresponding to alumina, magnesia, and alumina-magnesia. Our analysis reveals a transparent inexperienced advance, based mostly on multi-factor comparability: First, our system allows secure hydrogen transportation and on-demand launch (low hazard and allows clear power). Second, it makes use of a renewable and considerable bio-based supply and no noble metals (no useful resource depletion). Lastly, it requires solely easy preparation underneath ambient circumstances and at a low value (sensible software). All these make the encapsulation in versatile chitosan spheres a sexy strategy to sustainable catalysts for carbon-free fuels.