UChicago Argonne, LLC

Jonathan D Emery

Alex B Martinson

Peijun Guo

David M Tiede

In Soo Kim

Shannon C Riha

Gihan Kwon

An electrochemical cell that allows for in-situ structural characterization of amorphous thin film materials during the course of electrolysis using high-energy X-ray scattering (&#x3e;keV). The compact and versatile cell employs a three-electrode configuration and minimizes X-ray scattering contributions from the cell, reference and counter electrodes, as well as the working electrode support. A large surface area working electrode has a physically robust support and is largely transparent to X-rays. This design, which utilizes a three-dimensional working electrode, also greatly improves the intensity and quality of the scattered signal compared to a two-dimensional working electrode. The in-situ cell can be used not only to investigate structural evolution during electrolysis using X-ray scattering (e.g. pair distribution function), but also to perform electrochemical potential-dependent structural analysis by extended X-ray absorption fine structure.

Porous electrodes for spectroelectrochemistry and x-ray structure analyses

A method to provide an article of manufacture of iron oxide on indium tin oxide for solar energy conversion. An atomic layer epitaxy method is used to deposit an uncommon bixbytite-phase iron (III) oxide (&#x3b2;-FeO) which is deposited at low temperatures to provide 99% phase pure &#x3b2;-FeOthin films on indium tin oxide. Subsequent annealing produces pure &#x3b1;-FeOwith well-defined epitaxy via a topotactic transition. These highly crystalline films in the ultra thin film limit enable high efficiency photoelectrochemical chemical water splitting.

Atomic layer epitaxy of hematite on indium tin oxide for application in solar energy conversion

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Jonathan D Emery