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Interfacial Microenvironment Modulation Boosting Electron Transfer between Metal Nanoparticles and MOFs for Enhanced Photocatalysis
Author(s) -
Xu Mingliang,
Li Dandan,
Sun Kang,
Jiao Long,
Xie Chenfan,
Ding Chunmei,
Jiang HaiLong
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202104219
Subject(s) - photocatalysis , electron transfer , polyvinylpyrrolidone , catalysis , metal organic framework , chemistry , photochemistry , photosensitizer , chemical engineering , hydrogen production , nanoparticle , materials science , nanotechnology , organic chemistry , adsorption , engineering
Interfacial electron transfer between cocatalyst and photosensitizer is key in heterogeneous photocatalysis, yet the underlying mechanism remains subtle and unclear. Surfactant coated on the metal cocatalysts, greatly modulating the microenvironment of catalytic sites, is largely ignored. Herein, a series of Pt co‐catalysts with modulated microenvironments, including polyvinylpyrrolidone (PVP) capped Pt nanoparticles (denoted as Pt PVP ), Pt with partially removed PVP (Pt rPVP ), and clean Pt without PVP (Pt), were encapsulated into a metal–organic framework (MOF), UiO‐66‐NH 2 , to afford Pt PVP @UiO‐66‐NH 2 , Pt rPVP @UiO‐66‐NH 2 , and Pt@UiO‐66‐NH 2 , respectively, for photocatalytic hydrogen production. The PVP appears to have a negative influence on the interfacial electron transfer between Pt and the MOF. Compared with Pt PVP @UiO‐66‐NH 2 , the removal of interfacial PVP improves the sluggish kinetics of electron transfer, boosting photocatalytic hydrogen production.