Defect-original room-temperature hydrogen sensing of MoO 3 nanoribbon: Experimental and theoretical studies

•Ultralong MoO3 nanoribbons were successfully synthesized through the hydrothermal method.•Single MoO3 nanoribbon was assembled in a reasonably simple way to be a hydrogen sensor with high RT sensing performance.•The hydrogen sensing mechanism was systematically investigated through the experiments and simulations.