Zakari D, Audu G, Idris M, Aliyu A, Omatola K. Hydrogen and methane production using engineered microbes integrated with functional nanomaterials catalyst: A comprehensive review Running Title: Nanomaterial-Enhanced Microbial Bio-fuel Production. Eur. J. Phys. Funct. Mater. 2026;10(1):25-33. doi:10.32523/ejpfm.2026100102