研究领域

Analytical Chemistry

Dr. Creager’s research is in the general area of electrochemical science with an emphasis on electrochemical energy storage and conversion. Much of his research involves materials for polyelectrolyte membrane (PEM) fuel cells that convert chemical fuels such as hydrogen into electrical energy. Materials used in such devices include fluoropolymer ionomers to transport protons, platinum nanoparticles to catalyze electrode reactions, mesoporous carbon supports for the electrocatalysts, and others. The pictures show structures of some materials that he and his group study. He also pursues work on lithium ion battery materials, ionic-liquid electrolytes for solar cells, and microbial fuel cells and electrolysis cells that utilize bacteria to promote electrochemical reactions on electrodes to oxidize organic fuels or reduce carbon dioxide to make fuels. Most projects in his group include a combination of chemical or materials synthesis, materials characterization using a wide range of tools including electrochemical measurements, and device-level studies for evaluating materials performance. Nearly all the projects are collaborative with other groups both inside and outside of Clemson. Cartoon of PEM fuel cell Cartoon of a PEM fuel cell membrane-electrode assembly (MEA) with fluoropolymer ionomer in the electrodes and in the membrane separator. Electron Micrograph Electron micrograph images of mesoporous carbon / zirconia composites for use as catalyst supports in PEM fuel cells. Left, SEM image showing pores; right, TEM image showing atomic spacing in zirconia particles. microbial electrolysis cells Microbial electrolysis cells used to electrochemically convert carbon dioxide to acetate For further information on the Creager research group, please follow this link to our group web site.

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Verma R, Tomar N, Creager SE, & Smith DW (2012) Statically non-wetting electrospun perfluorocyclobutyl (PFCB) aryl ether polymer doped with room temperature ionic liquid (RTIL). Polymer 53(11):2211-2216. Norton JCS, Han MG, Creager S, & Foulger SH (2012) Electrochemical Redox of PEDOT-Coated Core-Shell Silica Spheres Stabilized in a PEG-Based Hydrogel Maxtrix: Modulation of the Optical Properties by Doping with Various Oxidative Mediators. International Journal of Electrochemical Science 7(4):3627-3637. Oh JM, Kumbhar AS, Geiculescu O, & Creager SE (2012) Mesoporous Carbon/Zirconia Composites: A Potential Route to Chemically Functionalized Electrically-Conductive Mesoporous Materials. Langmuir 28(6):3259-3270. Park J, Oh JM, Creager SE, & Smith DW (2012) Grafting of chain-end-functionalized perfluorocyclobutyl (PFCB) aryl ether ionomers onto mesoporous carbon supports. Chemical Communications 48(66):8225-8227. Byun CK, Parker T, Liang CC, Kendrick I, Dimakis N, Smotkin ES, Jin LM, Zhuang DQ, DesMarteau DD, Creager SE, & Korzeniewski C (2012) Thermal Processing as a Means to Prepare Durable, Submicron Thickness Ionomer Films for Study by Transmission Infrared Spectroscopy. Analytical Chemistry 84(19):8127-8132. Herath, M. B.; Hickman, T.; Creager, S. E.; DesMarteau, D. D., A new fluorinated anion for room-temperature ionic liquids. Journal of Fluorine Chemistry 2011, 132 (1), 52-56. Hongsirikarn, K.; Mo, X. H.; Goodwin, J. G.; Creager, S., Effect of H2O2 on Nafion (R) properties and conductivity at fuel cell conditions. Journal of Power Sources 2011, 196 (6), 3060-3072. Oh, J. M.; Geiculescu, O.; DesMarteau, D.; Creager, S., Ionomer Binders Can Improve Discharge Rate Capability in Lithium-Ion Battery Cathodes. Journal of the Electrochemical Society 2011, 158 (2), A207-A213 Herath, M. B.; Creager, S. E.; Kitaygorodskiy, A.; DesMarteau, D. D., Effect of Perfluoroalkyl Chain Length on Proton Conduction in Fluoroalkylated Phosphonic, Phosphinic, and Sulfonic Acids. Journal of Physical Chemistry B 2010, 114 (46), 14972-14976. Herath, M. B.; Creager, S. E.; Kitaygorodskiy, A.; DesMarteau, D. D., Perfluoroalkyl Phosphonic and Phosphinic Acids as Proton Conductors for Anhydrous Proton-Exchange Membranes. Chemphyschem 2010, 11 (13), 2871-2878. Hongsirikarn, K.; Goodwin, J. G.; Greenway, S.; Creager, S., Effect of cations (Na+, Ca2+, Fe3+) on the conductivity of a Nafion membrane. Journal of Power Sources 2010, 195 (21), 7213-7220. Hongsirikarn, K.; Goodwin, J. G.; Greenway, S.; Creager, S., Influence of ammonia on the conductivity of Nafion membranes. Journal of Power Sources 2010, 195 (1), 30-38. Liu, B.; Creager, S., Silica-sol-templated mesoporous carbon as catalyst support for polymer electrolyte membrane fuel cell applications. Electrochimica Acta 2010, 55 (8), 2721-2726. Liu, B.; Creager, S., Carbon xerogels as Pt catalyst supports for polymer electrolyte membrane fuel-cell applications. Journal of Power Sources 2010, 195 (7), 1812-1820. Shedge, H. Y.; Creager, S. E., Evaluation of non-specific binding suppression schemes for neutravidin and alkaline phosphatase at the surface of reticulated vitreous carbon electrodes. Analytica Chimica Acta 2010, 657 (2), 154-162. Byun, C. K.; Sharif, I.; DesMarteau, D. D.; Creager, S. E.; Korzeniewski, C., Infrared Spectroscopy of Bis[(perfluoroalkyl)sulfonyl] Imide Ionomer Membrane Materials. Journal of Physical Chemistry B 2009, 113 (18), 6299-6304. Herath, M. B.; Creager, S. E.; Rajagopal, R. V.; Geiculescu, O. E.; DesMarteau, D. D., Ionic conduction in polyether-based lithium arylfluorosulfonimide ionic melt electrolytes. Electrochimica Acta 2009, 54 (24), 5877-5883. Fears, K. P.; Creager, S. E.; Latour, R. A., Determination of the surface pK of carboxylic- and amine-terminated alkanethiols using surface plasmon resonance spectroscopy. Langmuir 2008, 24 (3), 837-843. Geiculescu, O. E.; Rajagopal, R. V.; Mladin, E. C.; Creager, S. E.; Desmarteau, D. D., SOLID POLYMER ELECTROLYTES FROM CROSSLINKED PEG AND DILITHIUM N,N '-BIS(TRIFLUOROMETHANESULFONYL)PERFLUOROALKANE-1,omega-DISULFONAMIDE AND LITHIUM BIS(TRIFLUOROMETHANESULFONYL)IMIDE SALTS. Collection of Czechoslovak Chemical Communications 2008, 73 (12), 1777-1798. Hallac, B. B.; Geiculescu, O. E.; Rajagopal, R. V.; Creager, S. E.; DesMarteau, D. D., Lithium-conducting ionic melt electrolytes from polyether-functionalized fluorosulfonimide anions. Electrochimica Acta 2008, 53 (20), 5985-5991. Mathis, B. J.; Marshall, C. W.; Milliken, C. E.; Makkar, R. S.; Creager, S. E.; May, H. D., Electricity generation by thermophilic microorganisms from marine sediment. Applied Microbiology and Biotechnology 2008, 78 (1), 147-155. Rao, A. K.; Creager, S. E., Preparation and characterization of superporous agarose-reticulated vitreous carbon electrodes as platforms for electrochemical bioassays. Analytica Chimica Acta 2008, 622 (1-2), 1-10.