Heat capacities and thermodynamic functions of neodymia and samaria doped ceria
Само за регистроване кориснике
2021
Аутори
Neilsen, GraceRosen, Peter F.
Dickson, Matthew S.
Popović, Marko
Schliesser, Jacob
Hansen, Lee D.
Navrotsky, Alexandra
Woodfield, Brian F.
Чланак у часопису (Објављена верзија)
,
Elsevier Ltd.
Метаподаци
Приказ свих података о документуАпстракт
Doped ceria materials are ionic conductors currently under investigation for use in solid oxide fuel cells, catalysts, and other applications. We measured the heat capacity of several doped ceria samples from 1.8 K to 300 K to better understand their physical properties. The samples used in this study were either singly doped with Nd or Sm, or co-doped with both Nd and Sm. This work complements an earlier detailed study of their heats of formation and ionic conductivity. Here we provide the thermodynamic functions based on theoretical fits of our heat capacity measurements including Cp,m°, Δ0TSm°, Δ0THm°, and Φm°. We also detected splitting of nuclear magnetic states, which appeared as an upturn in the heat capacity below 10 K. We observed this phenomenon in all samples and provide calculations of the local magnetic field causing the splitting.
Кључне речи:
SOFC / Schottky anomaly / Cerium oxide / Heat capacity / Hyperfine field splittingИзвор:
The Journal of Chemical Thermodynamics, 2021, 158, 106454-Издавач:
- Elsevier
Финансирање / пројекти:
- U.S. Department of Energy under grant DE-SC0016446
- U.S. Department of Energy under grant DE-SC0016573
- U.S. Department of Energy under grant DE-FG02-03ER46053
Институција/група
IHTMTY - JOUR AU - Neilsen, Grace AU - Rosen, Peter F. AU - Dickson, Matthew S. AU - Popović, Marko AU - Schliesser, Jacob AU - Hansen, Lee D. AU - Navrotsky, Alexandra AU - Woodfield, Brian F. PY - 2021 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/6070 AB - Doped ceria materials are ionic conductors currently under investigation for use in solid oxide fuel cells, catalysts, and other applications. We measured the heat capacity of several doped ceria samples from 1.8 K to 300 K to better understand their physical properties. The samples used in this study were either singly doped with Nd or Sm, or co-doped with both Nd and Sm. This work complements an earlier detailed study of their heats of formation and ionic conductivity. Here we provide the thermodynamic functions based on theoretical fits of our heat capacity measurements including Cp,m°, Δ0TSm°, Δ0THm°, and Φm°. We also detected splitting of nuclear magnetic states, which appeared as an upturn in the heat capacity below 10 K. We observed this phenomenon in all samples and provide calculations of the local magnetic field causing the splitting. PB - Elsevier T2 - The Journal of Chemical Thermodynamics T1 - Heat capacities and thermodynamic functions of neodymia and samaria doped ceria VL - 158 SP - 106454 DO - 10.1016/j.jct.2021.106454 ER -
@article{ author = "Neilsen, Grace and Rosen, Peter F. and Dickson, Matthew S. and Popović, Marko and Schliesser, Jacob and Hansen, Lee D. and Navrotsky, Alexandra and Woodfield, Brian F.", year = "2021", abstract = "Doped ceria materials are ionic conductors currently under investigation for use in solid oxide fuel cells, catalysts, and other applications. We measured the heat capacity of several doped ceria samples from 1.8 K to 300 K to better understand their physical properties. The samples used in this study were either singly doped with Nd or Sm, or co-doped with both Nd and Sm. This work complements an earlier detailed study of their heats of formation and ionic conductivity. Here we provide the thermodynamic functions based on theoretical fits of our heat capacity measurements including Cp,m°, Δ0TSm°, Δ0THm°, and Φm°. We also detected splitting of nuclear magnetic states, which appeared as an upturn in the heat capacity below 10 K. We observed this phenomenon in all samples and provide calculations of the local magnetic field causing the splitting.", publisher = "Elsevier", journal = "The Journal of Chemical Thermodynamics", title = "Heat capacities and thermodynamic functions of neodymia and samaria doped ceria", volume = "158", pages = "106454", doi = "10.1016/j.jct.2021.106454" }
Neilsen, G., Rosen, P. F., Dickson, M. S., Popović, M., Schliesser, J., Hansen, L. D., Navrotsky, A.,& Woodfield, B. F.. (2021). Heat capacities and thermodynamic functions of neodymia and samaria doped ceria. in The Journal of Chemical Thermodynamics Elsevier., 158, 106454. https://doi.org/10.1016/j.jct.2021.106454
Neilsen G, Rosen PF, Dickson MS, Popović M, Schliesser J, Hansen LD, Navrotsky A, Woodfield BF. Heat capacities and thermodynamic functions of neodymia and samaria doped ceria. in The Journal of Chemical Thermodynamics. 2021;158:106454. doi:10.1016/j.jct.2021.106454 .
Neilsen, Grace, Rosen, Peter F., Dickson, Matthew S., Popović, Marko, Schliesser, Jacob, Hansen, Lee D., Navrotsky, Alexandra, Woodfield, Brian F., "Heat capacities and thermodynamic functions of neodymia and samaria doped ceria" in The Journal of Chemical Thermodynamics, 158 (2021):106454, https://doi.org/10.1016/j.jct.2021.106454 . .