An Improved Metal-to-Ligand Charge Transfer Mechanism for Photocatalytic Hydrogen Evolution

ChemSusChem
Sicong WangGuoxiu Wang

Abstract

It is of great significance to fabricate a full-spectrum-active photocatalysts for more efficient utilization of solar energy. An improved metal-to-ligand charge transfer (MLCT) mechanism is proposed for a photocatalyst based on graphitic carbon nitride (g-C3 N4 ). UV/Vis spectroscopy indicates that the as-prepared photocatalyst absorbs light at λ<1100 nm. The rather stable photocatalyst is found to be 26.1 times more active in photocatalytic hydrogen evolution (868.9 μmol h-1  g-1 ) than bulk g-C3 N4 (B-CN) under visible light. The material exhibits high activity under near-infrared (NIR) irradiation (49.1 μmol h-1  g-1 ). The mechanism of photocatalytic activity and stability are investigated by both experiment and theory. This proposed mechanism may have great potential for engineering renewable photocatalysts in the future.

References

Dec 18, 2008·Chemical Society Reviews·Akihiko Kudo, Yugo Miseki
Jun 9, 2009·Chemical Communications : Chem Comm·Xuewen WangHui-Ming Cheng
Sep 1, 2009·Accounts of Chemical Research·Michael Grätzel
Mar 27, 2012·Journal of the American Chemical Society·Thomas R GordonChristopher B Murray

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Citations

Oct 6, 2020·The Journal of Physical Chemistry Letters·Matt D CapobiancoCharles A Schmuttenmaer

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