Aerobic Conditions Enhance the Photocatalytic Stability of CdS/CdOx Quantum Dots

Chemistry : a European Journal
David W WakerleyErwin Reisner

Abstract

Photocatalytic H2 production through water splitting represents an attractive route to generate a renewable fuel. These systems are typically limited to anaerobic conditions due to the inhibiting effects of O2 . Here, we report that sacrificial H2 evolution with CdS quantum dots does not necessarily suffer from O2 inhibition and can even be stabilised under aerobic conditions. The introduction of O2 prevents a key inactivation pathway of CdS (over-accumulation of metallic Cd and particle agglomeration) and thereby affords particles with higher stability. These findings represent a possibility to exploit the O2 reduction reaction to inhibit deactivation, rather than catalysis, offering a strategy to stabilise photocatalysts that suffer from similar degradation reactions.

References

Jan 11, 2014·Journal of the American Chemical Society·Jing GuAndrew B Bocarsly
Jan 15, 2014·Chemical Society Reviews·Takashi HisatomiKazunari Domen
May 21, 2015·The Journal of Physical Chemistry. B·Nicolas KaefferVincent Artero
Jun 22, 2017·Chemical Communications : Chem Comm·Biswajit Mondal, Abhishek Dey
Dec 9, 2017·Angewandte Chemie·Moritz F Kuehnel, Erwin Reisner

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Methods Mentioned

BETA
transmission electron microscopy

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