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Boosting Photocatalytic Hydrogen Production of a Metal–Organic Framework Decorated with Platinum Nanoparticles: The Platinum Location Matters
Author(s) -
Xiao JuanDing,
Shang Qichao,
Xiong Yujie,
Zhang Qun,
Luo Yi,
Yu ShuHong,
Jiang HaiLong
Publication year - 2016
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.201603990
Subject(s) - photocatalysis , platinum , hydrogen production , materials science , metal organic framework , photoluminescence , photocatalytic water splitting , catalysis , platinum nanoparticles , nanocomposite , hydrogen , nanoparticle , chemical engineering , photochemistry , charge carrier , nanotechnology , inorganic chemistry , water splitting , chemistry , optoelectronics , adsorption , organic chemistry , engineering
Improving the efficiency of electron–hole separation and charge‐carrier utilization plays a central role in photocatalysis. Herein, Pt nanoparticles of ca. 3 nm are incorporated inside or supported on a representative metal–organic framework (MOF), UiO‐66‐NH 2 , denoted as Pt@UiO‐66‐NH 2 and Pt/UiO‐66‐NH 2 , respectively, for photocatalytic hydrogen production via water splitting. Compared with the pristine MOF, both Pt‐decorated MOF nanocomposites exhibit significantly improved yet distinctly different hydrogen‐production activities, highlighting that the photocatalytic efficiency strongly correlates with the Pt location relative to the MOF. The Pt@UiO‐66‐NH 2 greatly shortens the electron‐transport distance, which favors the electron–hole separation and thereby yields much higher efficiency than Pt/UiO‐66‐NH 2 . The involved mechanism has been further unveiled by means of ultrafast transient absorption and photoluminescence spectroscopy.