scholarly journals Simultaneous Electrical, Electrochemical, and Optical Relaxation Measurements of Oxygen Surface Exchange Coefficients: Sr(Ti,Fe)O3−d Film Crystallization Case Study

2020 ◽  
Vol 12 (43) ◽  
pp. 48614-48630
Author(s):  
Emily J. Skiba ◽  
Ting Chen ◽  
Nicola H. Perry
Keyword(s):  
Surface Exchange ◽  
Relaxation Measurements ◽  
Oxygen Surface Exchange ◽  
Oxygen Surface

scholarly journals In-situ TEM Study of Oxygen Surface Exchange on Ceria, Gd-doped Ceria and Pr-doped Ceria

2021 ◽  
Vol 27 (S1) ◽  
pp. 2244-2245
Author(s):  
Mai Tan ◽  
Peter Crozier ◽  
Joshua Vincent
Keyword(s):  
In Situ Tem ◽  
Doped Ceria ◽  
Surface Exchange ◽  
Oxygen Surface Exchange ◽  
Oxygen Surface

scholarly journals Influence of Heterointerfaces on the Kinetics of Oxygen Surface Exchange on Epitaxial La1.85Sr0.15CuO4 Thin Films

2021 ◽  
Vol 11 (9) ◽  
pp. 3778
Author(s):  
Gene Yang ◽  
So-Yeun Kim ◽  
Changhee Sohn ◽  
Jong K. Keum ◽  
Dongkyu Lee
Keyword(s):  
Thin Films ◽  
Oxygen Vacancies ◽  
Elevated Temperatures ◽  
Surface Exchange ◽  
Electrical Conductivity Relaxation ◽  
Exchange Kinetics ◽  
Relaxation Curves ◽  
Kinetics Of ◽  
Oxygen Surface Exchange ◽  
Oxygen Surface

Considerable attention has been directed to understanding the influence of heterointerfaces between Ruddlesden–Popper (RP) phases and ABO3 perovskites on the kinetics of oxygen electrocatalysis at elevated temperatures. Here, we report the effect of heterointerfaces on the oxygen surface exchange kinetics by employing heteroepitaxial oxide thin films formed by decorating LaNiO3 (LNO) on La1.85Sr0.15CuO4 (LSCO) thin films. Regardless of LNO decoration, tensile in-plane strain on LSCO films does not change. The oxygen surface exchange coefficients (kchem) of LSCO films extracted from electrical conductivity relaxation curves significantly increase with partial decorations of LNO, whereas full LNO coverage leads to the reduction in the kchem of LSCO films. The activation energy for oxygen exchange in LSCO films significantly decreases with partial LNO decorations in contrast with the full coverage of LNO. Optical spectroscopy reveals the increased oxygen vacancies in the partially covered LSCO films relative to the undecorated LSCO film. We attribute the enhanced oxygen surface exchange kinetics of LSCO to the increased oxygen vacancies by creating the heterointerface between LSCO and LNO.

Oxygen surface exchange kinetics of SrTi1−xFexO3−δ mixed conducting oxides

2012 ◽  
Vol 14 (33) ◽  
pp. 11759 ◽  
Author(s):  
Chung-Yul Yoo ◽  
Henny J. M. Bouwmeester
Keyword(s):  
Surface Exchange ◽  
Conducting Oxides ◽  
Exchange Kinetics ◽  
Kinetics Of ◽  
Oxygen Surface Exchange ◽  
Oxygen Surface

Surface potentials and oxygen surface exchange coefficients of acceptor and donor-doped CeO2 thin films

2021 ◽  
Author(s):  
Hans F. Wardenga ◽  
Katharina N.S. Schuldt ◽  
Stephan Peter Waldow ◽  
Roger A De Souza ◽  
Andreas Klein
Keyword(s):  
Thin Films ◽  
Work Function ◽  
Surface Electron ◽  
Surface Exchange ◽  
Surface Potentials ◽  
Doped Ceo2 ◽  
Oxygen Surface Exchange ◽  
Oxygen Surface

In order to evaluate the influence of work function and surface electron concentrations on oxygen surface exchange coefficients, the surface potentials of acceptor-, donor-, and nominally un-doped CeO2 films are...

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