Article

Research published in Biochar indicates that a biochar modified with cobalt and iron can enhance biohydrogen production from agricultural waste by facilitating electron transfer in microbial fermentation. The study shows that this metal-doped biochar increases hydrogen yield by more than 100% at a concentration of 20 mg/L.

The modified biochar reduces electron transfer resistance and alters microbial metabolic pathways to favor hydrogen generation. Its porous structure promotes microbial adhesion and stability, demonstrating an effective strategy for renewable hydrogen production using inexpensive agricultural residues.