Open AccessSolar‐Driven Hydrogen Generation Catalyzed by g‐C 3 N 4 with Poly(platinaynes) as Efficient Electron Donor at Low Platinum Content
Author(s) -
Zhou Xuan,
Liu Yurong,
Jin Zhengyuan,
Huang Meina,
Zhou Feifan,
Song Jun,
Qu Junle,
Zeng YuJia,
Qian PengCheng,
Wong WaiYeung
Publication year - 2021
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202002465
Subject(s) - graphitic carbon nitride , acetylide , materials science , platinum , photocatalysis , band gap , hydrogen production , catalysis , metal , electron donor , nitride , noble metal , heterojunction , photochemistry , chemistry , nanotechnology , organic chemistry , optoelectronics , layer (electronics) , metallurgy
A metal‐complex‐modified graphitic carbon nitride (g‐C 3 N 4 ) bulk heterostructure is presented here as a promising alternative to high‐cost noble metals as artificial photocatalysts. Theoretical and experimental studies of the spectral and physicochemical properties of three structurally similar molecules Fo–D , Pt–D , and Pt–P confirm that the Pt(II) acetylide group effectively expands the electron delocalization and adjusts the molecular orbital levels to form a relatively narrow bandgap. Using these molecules, the donor–acceptor assemblies Fo–D @ CN , Pt–D @ CN , and Pt–P @ CN are formed with g‐C 3 N 4 . Among these assemblies, the Pt(II) acetylide‐based composite materials Pt–D @ CN and Pt–P @ CN with bulk heterojunction morphologies and extremely low Pt weight ratios of 0.19% and 0.24%, respectively, exhibit the fastest charge transfer and best light‐harvesting efficiencies. Among the tested assemblies, 10 mg Pt–P @ CN without any Pt metal additives exhibits a significantly improved photocatalytic H 2 generation rate of 1.38 µmol h −1 under simulated sunlight irradiation (AM1.5G, filter), which is sixfold higher than that of the pristine g‐C 3 N 4 .