Ultrafine platinum nanoparticles anchored in porous aromatic frameworks for efficient hydrogen evolution reaction.

Platinum is recognized as an effective electrochemical catalyst for hydrogen generation. Herein, a novel porous aromatic framework (PAF-99) is synthesized and two strategies including in situ preparation and post-synthesis are applied to introduce uniform platinum nanoparticles into PAF-99. The obtained platinum electrocatalysts (Pt-PAF-99 and Pt@PAF-99) exhibit great and distinct performances towards the hydrogen evolution reaction.