Operando X-ray photoelectron spectroscopic investigations of the electrochemical double layer at Ir/KOH(aq) interfaces

Lichterman, Michael F.; Richter, Matthias H.; Brunschwig, Bruce S.; Lewis, Nathan S.; Lewerenz, Hans-Joachim

doi:10.1016/j.elspec.2017.03.011

Title: Operando X-ray photoelectron spectroscopic investigations of the electrochemical double layer at Ir/KOH(aq) interfaces

Journal Article · 18 March 2017 · Journal of Electron Spectroscopy and Related Phenomena

DOI: https://doi.org/10.1016/j.elspec.2017.03.011 · OSTI ID:1538245

Lichterman, Michael F. ^[1]; Richter, Matthias H. ^[2]; Brunschwig, Bruce S. ^[3]; Lewis, Nathan S. ^[4]; Lewerenz, Hans-Joachim ^[3]

California Institute of Technology (CalTech), Pasadena, CA (United States); DOE/OSTI
California Institute of Technology (CalTech), Pasadena, CA (United States)
California Institute of Technology (CalTech), Pasadena, CA (United States). Joint Center for Artificial Photosynthesis
California Institute of Technology (CalTech), Pasadena, CA (United States); California Institute of Technology (CalTech), Pasadena, CA (United States). Kavli Nanoscience Institute

Tender X-ray operando photoemission spectroscopy has been used to directly analyze the energetics of the double layer at a metal-water interface in a dilute electrolyte having a Debye length of several nanometers. The data are compared to a theoretical evaluation of the potential of the solution near the electrode. Due to its noble nature, Ir was chosen as a working electrode material, and KOH(aq) at varied concentrations and thicknesses constituted the electrolyte. Shifts in peak width and binding energy of the water O 1s core level were analyzed by modeling based on Debye-Hückel approximations. The data is consistent with electrochemical formulations of the double layer that provide a foundation to electrochemistry.

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Research Organization:: California Institute of Technology (CalTech), Pasadena, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0004993; AC02-05CH11231

OSTI ID:: 1538245

Journal Information:: Journal of Electron Spectroscopy and Related Phenomena, Journal Name: Journal of Electron Spectroscopy and Related Phenomena Journal Issue: C Vol. 221; ISSN 0368-2048

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
electrochemical double layer
operando XPS
solid/liquid interface

Title: Operando X-ray photoelectron spectroscopic investigations of the electrochemical double layer at Ir/KOH(aq) interfaces

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References (19)

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