Tailoring the photoelectrochemistry of catalytic metal-insulator-semiconductor (MIS) photoanodes by a dissolution method

Nature Communications
G LogetS Ababou-Girard

Abstract

Apart from being key structures of modern microelectronics, metal-insulator-semiconductor (MIS) junctions are highly promising electrodes for artificial leaves, i.e. photoelectrochemical cells that can convert sunlight into energy-rich fuels. Here, we demonstrate that homogeneous Si/SiOx/Ni MIS junctions, employed as photoanodes, can be functionalized with a redox-active species and simultaneously converted into high-photovoltage inhomogeneous MIS junctions by electrochemical dissolution. We also report on the considerable enhancement of performance towards urea oxidation, induced by this process. Finally, we demonstrate that both phenomena can be employed synergistically to design highly-efficient Si-based photoanodes. These findings open doors for the manufacturing of artificial leaves that can generate H2 under solar illumination using contaminated water.

References

Oct 18, 2006·Proceedings of the National Academy of Sciences of the United States of America·Nathan S Lewis, Daniel G Nocera
Aug 5, 2009·Chemical Communications : Chem Comm·Bryan K BoggsGerardine G Botte
Dec 14, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Simon TricardTalal Mallah
Jan 18, 2012·Physical Chemistry Chemical Physics : PCCP·Mark C BiesingerRoger St C Smart
Apr 6, 2012·Accounts of Chemical Research·Daniel G Nocera
Sep 21, 2012·Journal of the American Chemical Society·Lena TrotochaudShannon W Boettcher
Aug 2, 2014·Chemical Reviews·Ke SunDeli Wang
Aug 12, 2015·The Journal of Physical Chemistry Letters·Ke SunNathan S Lewis
Oct 20, 2015·Nature Materials·Andrew G ScheuermannPaul C McIntyre
Nov 1, 2016·Chemical Reviews·Bryan M HunterAstrid M Müller
Dec 14, 2017·Nature Communications·Yan B VogelSimone Ciampi

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Methods Mentioned

BETA
infrared spectroscopy
X-ray
electron microscopy
scanning electron microscopy
transmission electron microscopy
quartz crystal microbalance
transmission

Software Mentioned

AZtec
ImageJ

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