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One‐Step Synthesis of Dicyanobenzene‐Derived Nitrogen‐Doped Porous Carbon Monolayers: Porosity and Near‐infrared Photoactivity

We present a facile and one‐step synthesis of a N‐doped porous carbon (NPC) material by direct heating of dicyanobenzene in the presence of ZnCl2, free from any pre‐ or post‐treatment. The resultant NPC material features graphite‐like monolayers with a thickness of approximately 1.4 nm, as proven by microscopy technology. NPC shows a BET surface area of 3038.5 m2 g−1 and a narrow pore‐size distribution centered at 0.51 nm. As a consequence, NPC displays a high H2 uptake of up to 2.96 wt % at 77 K and a CO2 adsorption capability of 23.4 wt % at 278 K and 0.1 MPa. N‐doping leads to extension of the optical absorption of NPC into the near‐infrared (NIR) region. This N‐decorated carbon material, as the first example of a NIR‐triggered carbon photocatalyst, exhibits pronounced H2 production capabilities. Carbonization of aromatic multinitriles would be a general and facile approach to prepare multifunctional N‐doped carbon materials for gas storage and full solar spectrum driven photocatalysts.