The synthesis of carbon nanotubes (CNTs) often involves catalytic chemical vapor deposition (CVD) using hydrocarbons like acetylene (C₂H₂) and hydrogen (H₂) as precursors. While hydrogen itself is generally not the main reactant, it can still pose a fire or explosion hazard during the synthesis process due to the following reasons:
1. **Flammability of Hydrogen**: Hydrogen is a highly flammable gas. It has a wide range of flammable