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An Efficient, Visible‐Light‐Driven, Hydrogen Evolution Catalyst NiS/Zn x Cd 1− x S Nanocrystal Derived from a Metal–Organic Framework
Author(s) -
Zhao Xiuxia,
Feng Jianrui,
Liu Jing,
Shi Wei,
Yang Guangming,
Wang GuiChang,
Cheng Peng
Publication year - 2018
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.201805425
Subject(s) - photocatalysis , catalysis , heterojunction , hydrogen production , materials science , visible spectrum , noble metal , nanocrystal , hydrogen , metal , chemical engineering , photochemistry , metal organic framework , water splitting , inorganic chemistry , nanotechnology , chemistry , adsorption , optoelectronics , metallurgy , organic chemistry , engineering
Photocatalytic water splitting for hydrogen production using sustainable sunlight is a promising alternative to industrial hydrogen production. However, the scarcity of highly active, recyclable, inexpensive photocatalysts impedes the development of photocatalytic hydrogen evolution reaction (HER) schemes. Herein, a metal–organic framework (MOF)‐template strategy was developed to prepare non‐noble metal co‐catalyst/solid solution heterojunction NiS/Zn x Cd 1− x S with superior photocatalytic HER activity. By adjusting the doping metal concentration in MOFs, the chemical compositions and band gaps of the heterojunctions can be fine‐tuned, and the light absorption capacity and photocatalytic activity were further optimized. NiS/Zn 0.5 Cd 0.5 S exhibits an optimal HER rate of 16.78 mmol g −1 h −1 and high stability and recyclability under visible‐light irradiation ( λ >420 nm). Detailed characterizations and in‐depth DFT calculations reveal the relationship between the heterojunction and photocatalytic activity and confirm the importance of NiS in accelerating the water dissociation kinetics, which is a crucial factor for photocatalytic HER.