Lab overview
  • SOFC activation
    Solid oxide fuel cells
    Rational design of better SOFC cathode materials through a fundamental understanding of the role of surface electronic structure and chemistry on the oxygen reduction reaction, including the effects of stress and hetero-interfaces.
  • Pyrite surface pitting
    Nanoscale pitting on surface films
    Point defect agglomeration leads to formation of pits on surface passive films, exemplified on pyrite, as a root-cause of pitting corrosion.
  • Cladding Degradation
    Cladding corrosion
    Mechanisms and kinetics of corrosion and hydrogen pick up in nuclear fuel cladding made of Zr alloys, assessed as a function of alloying elements and stress.
  • Flow stress upturn
    Degradation of microstructure at long time scale
    Modeling defect structure evolution and slow processes using newly adapted activation relaxation based atomistic techniques with extended time scales.
  • Strained Electrocatalysts
    Strained electrocatalysts
    Accelerate oxygen reduction and diffusion in mixed conducting electrocatalysts through easier formation and migration of oxygen vacancies by application of mechanical stress.
  • SOFC activation
    Solid oxide fuel cells
    Rational design of better SOFC cathode materials through a fundamental understanding of the role of surface electronic structure and chemistry on the oxygen reduction reaction, including the effects of stress and hetero-interfaces.

Yildiz Group's research focuses on laying the scientific groundwork and proof-of-principle material systems for the next generation of high-efficiency devices for energy conversion and information processing, based on solid state ionic-electronic materials. The scientific insights derived from our research impact the design of novel surface/interface chemistries for:

- efficient and durable solid oxide fuel cells,
- redox based memristive information storage and logic,
- efficient and durable thermo/electro-chemical splitting of water and CO2,
- high energy density and high power density solid state batteries, and
- corrosion resistant films in a wide range of extreme environments as in nuclear energy generation, concentrated solar energy, and oil exploration.

We have thus far made significant contributions in advancing the molecular-level understanding of oxygen reduction and oxidation kinetics on mixed ionic-electronic solid surfaces. Specifically we have uncovered the effects of elastic strain, dislocations, temperature and oxygen pressure on the reactivity and degradation of mixed ionic/electronic materials, by combining theoretical and experimental analyses of surface electronic structure, defect mobility and composition.

The key findings in much of our work are obtained through our development of in-situ scanning tunnelling spectroscopy and x-ray spectroscopy methods in conjunction with first-principles calculations and novel atomistic simulations.

Recent News

  1. Congratulations to Yen-Ting for being selected as the recipient of the Best Paper Award for Second or First Year Student at DMSE!
  2. Congratulations to Qiyang for being selected as the recipient of the Best Ph.D. Thesis Award at DMSE!
  3. Congratulations to Qiyang, Nikolai, Lixin, Ethan and Bilge for winning the Ross Coffin Purdy Award [link] of the American Ceramic Society for their paper on perovskite surface chemistry! [link]
  4. Congratulations to Vrindaa, Yenting and Dongha for passing their PhD qualifying exam!
  5. Congratulations to Prof. Yildiz on becoming a full professor!
  6. Congratulations to Dr. Qiyang Lu for successfully defending his thesis!

Recent Paper

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Modified Oxygen Defect Chemistry at Transition Metal Oxide Hetero-structures Probed by Hard X-Ray Photoelectron Spectroscopy and X-ray Diffraction

Yan Chen, Dillon D. Fong, F. William Herbert, Julien Rault, Jean-Pascal Rueff, Nikolai Tsvetkov, and Bilge Yildiz

      Chem. Mater., 30(10), 3359, 2018. DOI:10.1021/acs.chemmater.8b00808

© 2013, The Yildiz Group, Massachusetts Institute of Technology