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Graphite-protected CsPbBr3 perovskite photoanodes functionalised with water oxidation catalyst for oxygen evolution in water.

Abstract：

:Metal-halide perovskites have been widely investigated in the photovoltaic sector due to their promising optoelectronic properties and inexpensive fabrication techniques based on solution processing. Here we report the development of inorganic CsPbBr3-based photoanodes for direct photoelectrochemical oxygen evolution from aqueous electrolytes. We use a commercial thermal graphite sheet and a mesoporous carbon scaffold to encapsulate CsPbBr3 as an inexpensive and efficient protection strategy. We achieve a record stability of 30 h in aqueous electrolyte under constant simulated solar illumination, with currents above 2 mA cm-2 at 1.23 VRHE. We further demonstrate the versatility of our approach by grafting a molecular Ir-based water oxidation catalyst on the electrolyte-facing surface of the sealing graphite sheet, which cathodically shifts the onset potential of the composite photoanode due to accelerated charge transfer. These results suggest an efficient route to develop stable halide perovskite based electrodes for photoelectrochemical solar fuel generation.

journal_name

Nat Commun

journal_title

Nature communications

authors

Poli I,Hintermair U,Regue M,Kumar S,Sackville EV,Baker J,Watson TM,Eslava S,Cameron PJ

doi

10.1038/s41467-019-10124-0

subject

Has Abstract

pub_date

2019-05-08 00:00:00

pages

2097

issue

1

issn

2041-1723

pii

10.1038/s41467-019-10124-0

journal_volume

10

pub_type

杂志文章

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