Equilibrium oxygen storage capacity of ultrathin CeO2-δ depends non-monotonically on large biaxial strain

Nature Communications
Chirranjeevi Balaji GopalWilliam C Chueh

Abstract

Elastic strain is being increasingly employed to enhance the catalytic properties of mixed ion-electron conducting oxides. However, its effect on oxygen storage capacity is not well established. Here, we fabricate ultrathin, coherently strained films of CeO2-δ between 5.6% biaxial compression and 2.1% tension. In situ ambient pressure X-ray photoelectron spectroscopy reveals up to a fourfold enhancement in equilibrium oxygen storage capacity under both compression and tension. This non-monotonic variation with strain departs from the conventional wisdom based on a chemical expansion dominated behaviour. Through depth profiling, film thickness variations and a coupled photoemission-thermodynamic analysis of space-charge effects, we show that the enhanced reducibility is not dominated by interfacial effects. On the basis of ab initio calculations of oxygen vacancy formation incorporating defect interactions and vibrational contributions, we suggest that the non-monotonicity arises from the tetragonal distortion under large biaxial strain. These results may guide the rational engineering of multilayer and core-shell oxide nanomaterials.

References

Sep 13, 2002·Physical Review Letters·I BozovicI Sveklo
Nov 2, 2007·Nature Materials·Rainer Waser, Masakazu Aono
Sep 8, 2010·The Review of Scientific Instruments·Josh A WhaleyKevin F McCarty
Aug 21, 2013·Physical Chemistry Chemical Physics : PCCP·Steffen GrieshammerManfred Martin
Apr 12, 2014·ACS Nano·Sebastian SchweigerJennifer L M Rupp
Dec 17, 2014·Physical Chemistry Chemical Physics : PCCP·Tam Mayeshiba, Dane Morgan
Jun 13, 2015·Nature Communications·Björn KoosOla Söderberg
Jun 16, 2015·Nature Materials·Yanuo ShiJennifer Lilia Marguerite Rupp
Feb 13, 2016·Journal of the American Chemical Society·Jonathan R PetrieHo Nyung Lee
Dec 10, 2016·ACS Nano·Yezhou ShiWilliam C Chueh

❮ Previous
Next ❯

Citations

Apr 4, 2018·Nanoscale·P CopH Kozuka
Oct 31, 2018·Physical Chemistry Chemical Physics : PCCP·Yuxi Ma, Jason D Nicholas
Aug 6, 2019·Journal of Computational Chemistry·Ping LiuBaojun Wang
Dec 25, 2019·Chemical Society Reviews·Rafael SchmittJennifer L M Rupp
Feb 8, 2019·Scientific Reports·Jaakko MäkeläRobert M Wallace
May 26, 2018·Physical Chemistry Chemical Physics : PCCP·Tridip DasYue Qi
Apr 21, 2019·Scientific Reports·Linu MalakkalJerzy Szpunar
Mar 15, 2020·Nature Communications·Dongkyu LeeHo Nyung Lee
Aug 3, 2019·The Journal of Chemical Physics·Miroslav KettnerVáclav Nehasil
Jul 18, 2020·Chemistry : a European Journal·José Luis Núñez-RicoStefan Wershofen
Apr 5, 2018·ACS Applied Materials & Interfaces·Daniele PergolesiEnrico Traversa
Nov 8, 2019·The Journal of Physical Chemistry Letters·Hyojin YoonJunwoo Son
Aug 23, 2019·ACS Applied Materials & Interfaces·George F HarringtonHarry L Tuller
Jun 28, 2019·ACS Applied Materials & Interfaces·Yunkyu ParkJunwoo Son
Oct 6, 2021·Nature Communications·Joshua L Vincent, Peter A Crozier

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray
transmission electron microscopy
electron diffraction
atomic force microscopy

Software Mentioned

APXPS
VASP
Phonopy
Vienna Ab initio Simulation Package ( VASP

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.