Efficient Visible‐Light‐Driven Photocatalytic Hydrogen Generation over 2D/2D Co‐ZIF‐9/Ti3C2 Hybrids. Issue 4 (11th February 2022)

• Record Type: Journal Article
• Authors: Sun, Yitong; Xie, Min; Feng, Huifang; Liu, Hong
• Is Part Of: ChemPlusChem. Volume 87:Issue 4(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-11
• Subjects: cobalt -- metal-organic frameworks -- MXenes -- photocatalysis -- water splitting; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cplu.202100553
• Languages: English
• ISSNs: 2192-6506

Abstract

Abstract: Exploring precious‐metal‐free catalysts for efficient photocatalytic H2 evolution is highly desirable but still challenging. Herein, a novel 2D/2D Co‐ZIF‐9/Ti3 C2 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 Ti3 C2 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/Ti3 C2 composite displayed high photocatalytic stability. This study demonstrated for the first time the great potential of Co‐ZIF‐9/Ti3 C2 as a noble‐metal‐free catalyst for photocatalytic H2 generation. Abstract : A 2D/2D Co‐ZIF‐9/Ti3 C2 composite was developed for efficient photocatalytic H2 evolution for the first time. The composite presented maximum H2 ‐production rate of 3538.5 μmol g −1 ⋅ h −1 under visible‐light irradiation (with an apparent quantum efficiency of 4.8 % at 420 nm), which was 9.6 times as high as that of pristine Co‐ZIF‐9. The enhanced activity was ascribed to the excellent electrical conductivity of Ti3 C2, which promoted the separation and transportation of photoinduced charge carriers.