• A novel tubular g-C3N4@NiFe-LDH nanocomposite was synthesized via solvothermal and pyrolysis methods, exhibiting a well-defined tubular morphology (~3 μm length, ~200 nm diameter) for enhanced dispersion and interfacial contact.
• Doping LiAlH4 with 7wt% g-C3N4@NiFe-LDH dramatically improves dehydrogenation kinetics: the onset temperature is lowered to 79.2°C, releasing 6.8wt% hydrogen in two steps.
• Kissinger analysis shows that the apparent activation energies for the two dehydrogenation steps are reduced by 43.0% and 54.8%, respectively, indicating significantly enhanced kinetics.
• The synergistic effect between the g-C3N4 support and NiFe-LDH, along with potential in-situ formation of active interfacial species, is proposed as the mechanism for the catalytic enhancement.