N-containing chemicals and N-doped bio-char are co-generated.
A large amount of N contained species was formed with NH3 introduced in.
The specific capacitance of bio-char electrodes increased greatly to 187 F g−1.
Gas product is enriched of H2 (>50 vol.%) with LHV of ∼13 MJ Nm−3.
It is a promising method for high-valued utilization of biomass.