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Observation of Potential-Induced Hydration on the Surface of Ceramic Proton Conductors Using In Situ Near-Ambient Pressure X-ray Photoelectron Spectroscopy

Journal Article · · Journal of Physical Chemistry Letters
 [1];  [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9]
  1. Shanghai Jiao Tong Univ. (China); Univ. of Michigan, Ann Arbor, MI (United States)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Quaid-i-Azam Univ., Islamabad (Pakistan)
  5. Montpellier Univ. 2 (France); Centre National de la Recherche Scientifique (CNRS) (France)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS) ; Chinese Academy of Sciences (CAS), Beijing (China)
  7. Gwangju Inst. of Science and Technology (Korea, Republic of)
  8. Univ. of Hawaii at Manoa, Honolulu, HI (United States); Swiss Federal Laboratories for Materials Science and Technology (Empa), Dübendorf (Switzerland)
  9. Shanghai Jiao Tong Univ. (China); Univ. of Michigan, Ann Arbor, MI (United States); Swiss Federal Laboratories for Materials Science and Technology (Empa), Dübendorf (Switzerland)
+ Show Author Affiliations

Interactions of ceramic proton conductors with the environment under operating conditions play an essential role on material properties and device performance. It remains unclear how the chemical environment of material, as modulated by the operating condition, affects the proton conductivity. Combining near-ambient pressure X-ray photoelectron spectroscopy and impedance spectroscopy, we investigate the chemical environment changes of oxygen and the conductivity of BaZr0.9Y0.1O3-δ under operating condition. Changes in O 1s core level spectra indicate that adding water vapor pressure increases both hydroxyl groups and active proton sites at undercoordinated oxygen. Applying external potential further promotes this hydration effect, in particular, by increasing the amount of undercoordinated oxygen. The enhanced hydration is accompanied by improved proton conductivity. Here, this work highlights the effects of undercoordinated oxygen for improving the proton conductivity in ceramics.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0003525
OSTI ID:
1871968
Alternate ID(s):
OSTI ID: 1963042
Report Number(s):
SAND2022-4411J; 705346
Journal Information:
Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Journal Issue: 13 Vol. 13; ISSN 1948-7185
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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The effect of grain size on the hydration of BaZr0.9Y0.1O3-δ proton conductor studied by ambient pressure X-ray photoelectron spectroscopy
Journal Article · Mon Dec 02 23:00:00 EST 2019 · Physical Chemistry Chemical Physics. PCCP (Print) · OSTI ID:1767693

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Hydration
Hydroxyls
Lattices
Oxygen
Proton conductivity