Pub291

291) “A Structural Transition in an Ionic Liquid Controls CO2 Electrochemical Reduction”, Natalia Garcia-Rey and Dana D. Dlott, J. Phys. Chem. C 119 (36), pp 20892–20899 (2015). DOI: 10.1021/acs.jpcc.5b03397

Pub290

290) “Interfacial Processes of a Model Lithium Ion Battery Anode Observed, in situ, with Vibrational Sum-Frequency Generation Spectroscopy” by Bruno G. Nicolau, Natalia Garcia-Rey, Bogdan Dryzhakov, Dana D. Dlott, J. Phys. Chem. C, 119, pp. 10227-10233 (2015).

ElecInterfKutz2011

256) “Study of Ethanol Electrooxidation in Alkaline Electrolytes with Isotope Labels and Sum-Frequency Generation”, Robert B. Kutz, Björn Braunschweig, Prabuddha Mukherjee, Dana D. Dlott, and Andrzej Wieckowski, J. Phys. Chem. Lett. 2, pp. 2236–2240 (2011).

ElecInterfMukherjee2011

257) “In Situ Probing of Solid-Electrolyte Interfaces with Nonlinear Coherent Vibrational Spectroscopy”, Prabuddha Mukherjee, Alexei Lagutchev and Dana D. Dlott, J. Electrochem. Soc. 159, pp. A244-A252 (2012).

ElecInterfMukherjee2012

259) “Solid Electrolyte Interfaces and Interphases in Lithium Batteries: In Situ Studies Using Nonlinear Optical Probes”, Prabuddha Mukherjee, Alexei Lagutchev and Dana D Dlott, Mater. Res. Soc. Symp. Proc. vol. 1388 (2012).

ElecInterfRosen2012

261) “In Situ Spectroscopic Examination of a Low Overpotential Pathway for Carbon Dioxide Conversion to Carbon Monoxide”, Brian A. Rosen, John L. Haan, Prabuddha Mukherjee, Björn Braunschweig, Wei Zhu, Amin Salehi-Khojin, Dana D. Dlott, Richard I. Masel, J. Phys. Chem. C 116, pp. 15307-15312 (2012).

BookChapterBerg2012

264) (invited) “Vibrational sum-frequency generation spectroscopy of interfacial dynamics”, Christopher M. Berg and Dana D. Dlott, To appear in: Vibrational Spectroscopy of Electrically-Charged Interfaces, Editors A. Wieckowski, C. Korzeniewski and B. Braunschweig (Wiley, Hoboken N. J., 2013).

In situ spectroscopy of lithium ion batteries

Lithium-ion batteries have revolutionized transportable power but in order to realize the potential of transportable energy storage, the storage capacity of these batteries needs to be improved by perhaps an order of magnitude. The US Department of Energy Office of Basic Energy Sciences has identified advancing the fundamental science of electrochemical energy storage as a prime national goal and has funded a number of Energy Frontier Research Centers (EFRC) to advance this goal. This project is funded through one of these EFRC projects termed “Center for Electrical Energy Storage–Tailored Interfaces” which focuses on interfacial phenomena. The EFRC is a consortium of investigators from UIUC, Northwestern University and Argonne National Laboratory. Lithium-ion batteries are inherently unstable because the batteries operate at potentials that can reduce the electrolyte, which is normally an organic liquid or solid such as an organic carbonate. However during the initial charge-discharge cycles in a batter, a solid-electrolyte interphase (SEI) forms on the anode which stifles the electrolyte decomposition and helps protect the electrode from dendrite growth than can short out and destroy the cell. An SEI is a finite thickness layer typically tens of nanometers thick. Our project seeks to understand how SEI layers form and evolve during successive charge-discharge cycles using SFG as an in situ probe of the interfaces associated with the SEI.

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Electrochemical reduction of carbon dioxide (artificial photosynthesis)

This work is a collaborative effort between the Dlott spectroscopy group and Dioxide Materials, a company founded by Prof. Richard Masel. In the conventional photosynthesis-fuel cycle, sunlight causes green plants to grow. The growth involves converting carbon dioxide and water from the air and soil into biomass. The biomass is harvested and converted to fuels. Burning the fuels creates carbon dioxide and water. In artificial photosynthesis, carbon dioxide from the air is electrochemically reduced to carbon monoxide and water is reduced to H2 and O2. The current needed for the electrochemistry is generated by solar cells. The H2 and CO form feedstock for synfuels. Although a great deal of attention has been focused on the water part of the equation, reducing water to H2 and O2, less attention has been paid to reducing CO2 to CO. Systems used to do this so far have a large overpotential, which wastes much of the electric energy as heat. Dioxide Materials specializes in the development of co-catalysts for electrochemistry. A co-catalyst that greatly reduces this overpotential has been discovered, consisting of a metal electrode with a thin layer of adsorbed ionic liquid. In collaboration with the Dlott group, the mechanisms underlying the activity of this cocatalyst have been studied using SFG.

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