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Silver Single Atom in Carbon Nitride Catalyst for Highly Efficient Photocatalytic Hydrogen Evolution
Author(s) -
Jiang XunHeng,
Zhang LongShuai,
Liu HaiYan,
Wu DaiShe,
Wu FeiYao,
Tian Lei,
Liu LingLing,
Zou JianPing,
Luo ShengLian,
Chen BingBing
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202011495
Subject(s) - catalysis , scanning transmission electron microscopy , materials science , carbon nitride , atom (system on chip) , nitride , dispersion (optics) , absorption (acoustics) , photocatalysis , hydrogen atom , carbon fibers , nanotechnology , crystallography , transmission electron microscopy , chemistry , composite material , optics , physics , organic chemistry , composite number , layer (electronics) , computer science , embedded system , alkyl
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‐N 2 C 2 /CN) catalyst with a unique coordination. The Ag atomic dispersion and Ag‐N 2 C 2 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‐N 2 C 2 can reduce the H 2 evolution barrier, expand the light absorption range, and improve the charge transfer of CN. As a result, the Ag‐N 2 C 2 /CN catalyst exhibits much better H 2 evolution activity than the N‐coordinated Ag single atom in CN (Ag‐N 4 /CN), and is even superior to the Pt nanoparticle‐loaded CN (Pt NP /CN). This work provides a new idea for the design and synthesis of SACs with novel configurations and excellent catalytic activity and durability.