1. Introduction to catalysts 2. Green metal free catalysts 3. Carbon based metal free catalysts, structure properties and morphologies 4. Carbon nanomaterials as metal-free catalysts in next generation fuel cells 5. Electrocatalysys based on carbon-based metal free catalysts 6. Sulphur based advanced metal free catalysts 7. Carbon nanotubes as metal free catalysts for destruction of organic pollutant 8. Progress in carbon-based metal free catalysis 9. Role of activated carbon as metal free catalysts 10. Multiwale nanotubes as metal free catalysts for hydrogen production 11. p-doped graphene and application as metal free catalysts 12. Carbon supported metal free catalysts for the electrochemical CO2 reduction 13. Carbon composites as metal free catalysts 14. Nitrogen doped graphene foam as metal free catalysts 15. Metal free catalysts for the fuel cell application 16. Recent A preparation of cyclic carbonates by carbon-based metal free catalysts 17. Nano carbon-based metal free catalysts: types, preparation and applications 18. Types of carbon free catalysts