Efficient Visible‐Light‐Driven Photocatalytic Hydrogen Generation over 2D/2D Co‐ZIF‐9/Ti3C2 Hybrids

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Exploring precious‐metal‐free catalysts for efficient photocatalytic H2 evolution is highly desirable but still challenging. Herein, a novel 2D/2D Co‐ZIF‐9/Ti3C2 composite was fabricated by a facile electrostatic self‐assembly strategy. Owing to higher flux of photogenerated electron‐holes and lower rate of recombination, the resultant composite exhibited better photocatalytic H2 evolution compared to Co‐ZIF‐9. When the content of Ti3C2 was 2.5 wt %, a maximum photocatalytic H2‐generation rate of 3538.5 μmol g−1 ⋅ h−1 was achieved, which is 9.6 times that of bare Co‐ZIF‐9. Moreover, the Co‐ZIF‐9/Ti3C2 composite displayed high photocatalytic stability. This study demonstrated for the first time the great potential of Co‐ZIF‐9/Ti3C2 as a noble‐metal‐free catalyst for photocatalytic H2 generation.