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Title: Origin and tunability of unusually large surface capacitance in doped cerium oxide studied by ambient-pressure X-ray photoelectron spectroscopy

Journal Article · · Advanced Materials
 [1];  [2];  [2];  [3]
  1. Stanford Univ., Stanford, CA (United States)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  3. Sandia National Lab. (SNL-CA), Livermore, CA (United States); Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
+ Show Author Affiliations

Here, the volumetric redox (chemical) capacitance of the surface of CeO2–δ films is quantified in situ to be 100-fold larger than the bulk values under catalytically relevant conditions. Sm addition slightly lowers the surface oxygen nonstoichiometry, but effects a 10-fold enhancement in surface chemical capacitance by mitigating defect interactions, highlighting the importance of differential nonstoichiometry for catalysis.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1327906
Report Number(s):
SAND-016-9423J; 647625
Journal Information:
Advanced Materials, Vol. 28, Issue 23; ISSN 0935-9648
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 30 works
Citation information provided by
Web of Science

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Cited By (7)

In Situ Optical Absorption Studies of Point Defect Kinetics and Thermodynamics in Oxide Thin Films journal June 2019
A Space-Charge Treatment of the Increased Concentration of Reactive Species at the Surface of a Ceria Solid Solution journal October 2017
Equilibrium oxygen storage capacity of ultrathin CeO2-δ depends non-monotonically on large biaxial strain journal May 2017
Oxygen exchange kinetics on systematically doped ceria: a pulsed isotope exchange study journal January 2019
Low oxygen partial pressure increases grain boundary ion conductivity in Gd-doped ceria thin films journal November 2019
A Space-Charge Treatment of the Increased Concentration of Reactive Species at the Surface of a Ceria Solid Solution journal October 2017
A review of defect structure and chemistry in ceria and its solid solutions text January 2020

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
36 MATERIALS SCIENCE
ceria
redox
catalysis
nonstoichiometry
in-situ