Silver Single Atom in Carbon Nitride Catalyst for Highly Efficient Photocatalytic Hydrogen Evolution

Xun Heng Jiang, Long Shuai Zhang, Hai Yan Liu, Dai She Wu, Fei Yao Wu, Lei Tian, Ling Ling Liu, Jian Ping Zou, Sheng Lian Luo, Bing Bing Chen

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359 引用 (Scopus)

摘要

Single atom catalysts (SACs) with the maximized metal atom efficiency have sparked great attention. However, it is challenging to obtain SACs with high metal loading, high catalytic activity, and good stability. Herein, we demonstrate a new strategy to develop a highly active and stable Ag single atom in carbon nitride (Ag-N2C2/CN) catalyst with a unique coordination. The Ag atomic dispersion and Ag-N2C2 configuration have been identified by aberration-correction high-angle-annular-dark-field scanning transmission electron microscopy (AC-HAADF-STEM) and extended X-ray absorption. Experiments and DFT calculations further verify that Ag-N2C2 can reduce the H2 evolution barrier, expand the light absorption range, and improve the charge transfer of CN. As a result, the Ag-N2C2/CN catalyst exhibits much better H2 evolution activity than the N-coordinated Ag single atom in CN (Ag-N4/CN), and is even superior to the Pt nanoparticle-loaded CN (PtNP/CN). This work provides a new idea for the design and synthesis of SACs with novel configurations and excellent catalytic activity and durability.

源语言英语
页(从-至)23112-23116
页数5
期刊Angewandte Chemie - International Edition
59
51
DOI
出版状态已出版 - 14 12月 2020

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