Operando Tracking of Electrochemical Activity in Solid Oxide Electrochemical Cells by using Near‐Infrared Imaging. Issue 10 (14th July 2015)

• Record Type: Journal Article
• Authors: Geller, Aaron; Pomfret, Michael; Steinhurst, Daniel A.; Yu, Yi; Liu, Zhi; Owrutsky, Jeffrey C.; Eichhorn, Bryan W.
• Is Part Of: ChemElectroChem. Volume 2:Issue 10(2015)
• Page Start: 1527
• Page End: 1534
• Publication Date: 2015-07-14
• Subjects: Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.201500150
• Languages: English
• ISSNs: 2196-0216

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Near‐infrared (NIR) imaging is used in conjunction with near ambient pressure X‐ray photoelectron spectroscopy (APXPS) to study chemical and electrochemical redox processes on a ceria‐based solid oxide electrochemical cell (SOC). Electrochemical water electrolysis tests conducted in ambient operating conditions on standard SOCs show that NIR imaging can be used to spatially resolve the electrochemically active regions associated with an accumulation of Ce³⁺. These effective emissivity changes are attributed to changes in optical properties (e.g. the index of refraction) of ceria that occur upon reduction. These data correlate strongly with APXPS measurements, simultaneously supporting the model (near ambient conditions and single‐sided cell setup required by APXPS experiments) and the ability to elucidate mechanistic details on an operating SOC using an inexpensive, convenient NIR imaging technique.</p> </abstract>