Ultrathin Metal–Organic Framework Nanosheets with Ultrahigh Loading of Single Pt Atoms for Efficient Visible‐Light‐Driven Photocatalytic H2 Evolution. Issue 30 (24th June 2019)

• Record Type: Journal Article
• Authors: Zuo, Quan; Liu, Tingting; Chen, Chuanshuang; Ji, Yi; Gong, Xueqing; Mai, Yiyong; Zhou, Yongfeng
• Is Part Of: Angewandte Chemie international edition. Volume 58:Issue 30(2019)
• Page Start: 10198
• Page End: 10203
• Publication Date: 2019-06-24
• Subjects: hydrogen evolution -- metal–organic frameworks -- photocatalysis -- single-atom catalysts -- two-dimensional materials; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201904058
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: A surfactant‐stabilized coordination strategy is used to make two‐dimensional (2D) single‐atom catalysts (SACs) with an ultrahigh Pt loading of 12.0 wt %, by assembly of pre‐formed single Pt atom coordinated porphyrin precursors into free‐standing metal–organic framework (MOF) nanosheets with an ultrathin thickness of 2.4±0.9 nm. This is the first example of 2D MOF‐based SACs. Remarkably, the 2D SACs exhibit a record‐high photocatalytic H2 evolution rate of 11 320 μmol g −1 h −1 via water splitting under visible light irradiation ( λ >420 nm) compared with those of reported MOF‐based photocatalysts. Moreover, the MOF nanosheets can be readily drop‐casted onto solid substrates, forming thin films while still retaining their photocatalytic activity, which is highly desirable for practical solar H2 production. Abstract : Ultrathin porphyrin‐based MOF nanosheets with an ultrahigh loading (12 wt %) of single Pt atoms were synthesized by a novel surfactant‐assisted coordination strategy. The 2D single‐atom catalysts (SACs) exhibit outstanding photocatalytic activity, with a high H2 production rate of 11 320 μmol g −1 h −1 by water splitting under visible‐light irradiation ( λ >420 nm).