Bilge Yıldız
Assistant Professor of Nuclear Science and Engineering
Jointly appointed by Argonne National Laboratory
Email: byildiz@mit.edu
Phone: 617-324-4009
Fax: 617-258-8863
MIT Department of Nuclear Science and Engineering
77 Massachusetts Avenue, 24-210
Cambridge, MA 02139-4307
Education
- Ph.D., Nuclear
Science and Engineering,
Massachusetts
Institute of Technology, 2002.
- B.Sc., Nuclear
Engineering,
Hacettepe
University
Ankara,
Turkey , 1999.
Positions Held
- Nuclear Engineer,
Argonne National Laboratory, 09/2004 – 08/2007
- Postdoctoral Research
Associate, Electrochemical Energy Laboratory, and the Center
for Advanced Nuclear Energy Systems, MIT, 01/2003 – 08/2004
Research
Interests
Dr. Yildiz’s research focuses on understanding the interplay between structure, properties,
and performance in electrochemically active material interfaces in nuclear
technologies. Of particular interest are the two areas of study: 1) conducting
oxides for enhanced activity and durability in high temperature electrochemical
cells for hydrogen production/utilization devices, and 2) alloy structures for improved
resistance against corrosion in nuclear materials. A common theme in Dr. Yildiz’s research areas is the fundamental study of the surface/interface
chemistry. The surface chemistry in electrochemical interfaces can be
dramatically influenced by the presence of nanoscale grains, specially tailored grain boundaries and hetero-interfaces, and special crystallographic
structures at the interfaces. These, all together, control the reactivity,
transport properties, and durability of the interface of interest.
Understanding the properties of such
interfacial materials requires a multidisciplinary approach. Dr. Yildiz aims to use new spectroscopic techniques, analytical
theory, and simulations to probe the interface reactivity and material
properties at a molecular level in the areas for hydrogen production and alloy
corrosion.
One example is represented in Fig. 1 (below),
which shows the unique in situ x-ray
characterization set-up that Dr. Yildiz and her
colleagues in Argonne National Laboratory have developed for high temperature electrocatalytic materials. The results obtained from these
experiments have for the first time indicated that the cation (e.g. La in La0.8Sr0.2MnO3) migration to/from
the surface under electrical polarization is correlated by an improvement in
the activity of the electrode material.
Figure 1. (a) The in situ x-ray absorption spectroscopy and electrochemical impedance spectroscopy characterization set-up for high-temperature oxygen electrodes. Set-up established at the Advanced Photon Source – MR-CAT beamline [Ref.1]; (b) La LIII edge XANES intensity for surface of the dense thin film LSM electrode at 700°C, showing the segregation of La to the surface under anodic electrochemical polarization (EP) over time (t) [Ref.1].
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Awards/Honors/Professional
Societies
- Pacesetter Award,
Argonne
National Laboratory (08/2006)
- Outstanding Teaching Assistant Award, MIT (05/2002)
- Sigma Xi - The
Scientific Research Society
- American Nuclear
Society
- The Electrochemical Society
- Materials Research Society
Selected
Publications
- B. Yildiz, K.-C. Chang, D. Myers, J.D.
Carter, and H. You, “In situ X-ray and Electrochemical Studies of the Solid Oxide Fuel and Electrolysis Cell
Electrodes” Proc. 31st International Conference on Advanced Ceramics and
Composites, January 2007, Daytona FL, to be published in August 2007.
- B. Yildiz, G.J. La O’, Y. and Shao-Horn, “Oxygen Reduction Kinetics at Sr-doped LaMnO3 Supported on Ytrria Stabilized Zirconia: An Electrochemical Kinetics
Modeling Study,” submitted to the J. Electrochem.
Soc. (2007).
- G.J. la O’, B. Yildiz, S. McEuen, and Y. Shao-Horn,
“Probing Oxygen Reduction Reaction Kinetics of Sr-doped
LaMnO3 Supported on Yttria Stabilized Zirconia: An Electrochemical Impedance Study of Dense,
Thin-Film Microelectrodes,” J. Electrochem. Soc. 154,
B427-B428 (2007).
- J. D. Carter, A. Call, M. Ferrandon,
A. J. Kropf, V. A. Maroni,
J. Mawdsley, D. J. Myers, B. Yildiz,
“Post-Test Evaluation of a Solid Oxide Electrolysis Stack”, ANS Transactions,
Proc. Safety and Technology of Nuclear Hydrogen Production, Control and
Management at American Nuclear Society Annual Meeting, Boston, MA, USA, June
2007.
- B. Yildiz, T. Sofu, “Modeling and
Performance Study of Planar Solid Oxide Electrolysis Cells”, ANS Transactions, Proc. Safety and
Technology of Nuclear Hydrogen Production, Control and Management at American
Nuclear Society Annual Meeting, Boston, MA USA
,
June 2007.
- Botterud A., Yildiz B., Conzelmann G., Petri M.C., “The Value of Product
Flexibility in Nuclear Hydrogen Technologies”, ANS Transactions, Proc. Safety
and Technology of Nuclear Hydrogen Production, Control and Management at
American Nuclear Society Annual Meeting, Boston, MA, June 2007.
- B. Yildiz, K.-C. Chang, D. Myers, J.D.
Carter, and H. You, “In situ X-ray, Electrochemical, and Modeling Investigation of the Oxygen Electrode
Activation,” Proc. 7th European Solid Oxide Fuel Cell Forum, Luzern Switzerland (2006).
- Yildiz, B., Hohnholt, K. J., Kazimi, M. S.,
“Hydrogen Production Using High Temperature Steam Electrolysis Supported by
Advanced Gas Reactors and Supercritical CO2 Cycles”, Nuclear Technology, Vol.
155 (1), 2006.
- Petri, M.C., Yildiz, B., Klickman, A., “US Work on Technical and Economic Aspects of
Electrolytic, Thermochemical, and Hybrid Processes
for Hydrogen Production at Temperatures Below 550°C”, Int. J. Nuclear Hydrogen
Production and Application, Vol. 1 (1), 2006.
- Yildiz, B., Kazimi, M. S., “Efficiency of Hydrogen Production Systems
Using Alternative Nuclear Energy Technologies”, Int. J. of Hydrogen Energy,
Vol. 31 (1), 2006.