A Molecular Hybrid of an Atomically Precise Silver Nanocluster and Polyoxometalates for H2 Cleavage into Protons and Electrons. (26th June 2021)

• Record Type: Journal Article
• Authors: Yonesato, Kentaro; Yamazoe, Seiji; Yokogawa, Daisuke; Yamaguchi, Kazuya; Suzuki, Kosuke
• Is Part Of: Angewandte Chemie. Volume 133:Number 31(2021)
• Page Start: 17131
• Page End: 17135
• Publication Date: 2021-06-26
• Subjects: cluster compounds -- hydrogen -- polyoxometalates -- silver nanoclusters; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202106786
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Atomically precise silver (Ag) nanoclusters are promising materials as catalysts, photocatalysts, and sensors because of their unique structures and mixed‐valence states (Ag + /Ag 0 ). However, their low stability hinders the in‐depth study of their intrinsic reactivity and catalytic property accompanying their redox processes. Herein, we demonstrate that a molecular hybrid of an atomically precise {Ag27 } 17+ nanocluster and polyoxometalates (POMs) can efficiently cleave H2 into protons and electrons. The Ag nanocluster accommodates electrons through the redox reaction from {Ag27 } 17+ to {Ag27 } 13+, and the POM ligands play the following important roles: (i) a significant stabilization of the typically unstable Ag nanocluster to preserve its structure during the redox reaction with H2, (ii) formation of a unique interface between the Ag nanocluster and metal oxides for efficient H2 cleavage, and (iii) storage of the generated protons on the negatively charged basic surface. Abstract : A molecular hybrid of an atomically precise mixed‐valent {Ag27 } 17+ nanocluster and polyoxometalate (POM) ligands exhibited unique reactivity, efficiently cleaving dihydrogen (H2 ) into protons and electrons. The protons and electrons generated are stored on the POM surface and the mixed‐valent {Ag27 } 17+ nanoclusters, respectively.