Constructing a fragmentary g-C ₃ N ₄ framework with rich nitrogen defects as a highly efficient metal-free catalyst for acetylene hydrochlorination

Fragmentary g-C ₃ N ₄ was prepared using a melamine formaldehyde resin precursor, which exhibited an activity 30 times higher than pure g-C ₃ N ₄ in acetylene hydrochlorination.