Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Giant onsite electronic entropy enhances the performance of ceria for water splitting

Journal Article · · Nature Communications
 [1];  [1];  [2];  [3];  [4];  [1]
  1. Northwestern Univ., Evanston, IL (United States). Department of Materials Science and Engineering
  2. Technical University of Denmark (Denmark). Department of Energy Conversion and Storage
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Yale Univ., New Haven, CT (United States). Department of Applied Physics; Yale Energy Sciences Institute, West Haven, CT (United States)
Previous studies have shown that a large solid-state entropy of reduction increases the thermodynamic efficiency of metal oxides, such as ceria, for two-step thermochemical water splitting cycles. In this context, the configurational entropy arising from oxygen off-stoichiometry in the oxide, has been the focus of most previous work. Here we report a different source of entropy, the onsite electronic configurational entropy, arising from coupling between orbital and spin angular momenta in lanthanide f orbitals. We find that onsite electronic configurational entropy is sizable in all lanthanides, and reaches a maximum value of ≈4.7 kB per oxygen vacancy for Ce4+/Ce3+ reduction. This unique and large positive entropy source in ceria explains its excellent performance for high-temperature catalytic redox reactions such as water splitting. Our calculations also show that terbium dioxide has a high electronic entropy and thus could also be a potential candidate for solar thermochemical reactions.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC52-07NA27344; FG02-07ER46433
OSTI ID:
1395468
Alternate ID(s):
OSTI ID: 1400078
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 8; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (51)

Hydrogen from water by reduced cerium oxide journal February 1983
Mixed oxides of the type MO2 (fluorite)—M2O3—I oxygen dissociation pressures and phase relationships in the system CeO2Ce2O3 at high temperatures journal September 1964
A thermodynamic study of nonstoichiometric cerium dioxide journal November 1975
Small polaron electron transport in reduced CeO2 single crystals journal January 1977
Estimation of the standard entropy change on complete reduction of oxide MmOn journal February 1981
Ceria-based solid electrolytes journal January 1996
Use of CeO2-based oxides in the three-way catalysis journal April 1999
Vaporization thermodynamics of lanthanide trihalides journal October 1977
Materials for fuel-cell technologies journal November 2001
Nanostructured ceria-based materials: synthesis, properties, and applications journal January 2012
Entropies of defect formation in ceria from first principles journal January 2013
CCCLI.—An investigation on the ceria–thoria catalysts journal January 1928
A thermochemical study of ceria: exploiting an old material for new modes of energy conversion and CO 2 mitigation
  • Chueh, William C.; Haile, Sossina M.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 368, Issue 1923 https://doi.org/10.1098/rsta.2010.0114
journal July 2010
Temperature-Dependent Crystal Field and Hyperfine Interactions journal August 1965
Obtaining correct orbital ground states in f -electron systems using a nonspherical self-interaction-corrected LDA + U method journal September 2009
Self-consistent density functional calculations of the crystal field levels in lanthanide and actinide dioxides journal February 2012
The Effects of Morphology on the Oxidation of Ceria by Water and Carbon Dioxide journal November 2011
Renewable Hydrogen from Ethanol by Autothermal Reforming journal February 2004
High-Flux Solar-Driven Thermochemical Dissociation of CO2 and H2O Using Nonstoichiometric Ceria journal December 2010
General Factors Governing the Efficiency of Luminescent Devices journal January 2005
Solar Thermochemical Hydrogen Production via Terbium Oxide Based Redox Reactions journal January 2016
Materials-Related Aspects of Thermochemical Water and Carbon Dioxide Splitting: A Review journal October 2012
Template-assisted formation of microsized nanocrystalline CeO 2 tubes and their catalytic performance in the carboxylation of methanol journal January 2011
Evidence for Oxidation of Ceria by CO2 journal February 2000
Ceria in automotive exhaust catalysts I. Oxygen storage journal April 1984
Small polaron electron transport in reduced CeO2 single crystals journal January 1977
Automotive exhaust catalysis journal May 2003
Physical, chemical and electrochemical properties of pure and doped ceria journal April 2000
Appraisal of Ce1−yGdyO2−y/2 electrolytes for IT-SOFC operation at 500°C journal April 2000
Use of CeO2-based oxides in the three-way catalysis journal April 1999
Ab initio calculations on the local structure and the 4f–5d absorption and emission spectra of -doped YAG journal August 2008
Thermochemical hydrogen production from a two-step solar-driven water-splitting cycle based on cerium oxides journal December 2006
Direct oxidation of hydrocarbons in a solid-oxide fuel cell journal March 2000
CCCLI.—An investigation on the ceria–thoria catalysts journal January 1928
Thermodynamics of solid electrolytes and related oxide ceramics based on the fluorite structure journal January 2010
New Regularities in the Spectra of the Alkaline Earths journal January 1925
Extraction of crystal-field parameters for lanthanide ions from quantum-chemical calculations journal January 2011
Temperature-Dependent Crystal Field and Hyperfine Interactions journal August 1965
Projector augmented-wave method journal December 1994
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
4 f n → 4 f n − 1 5 d transitions of the light lanthanides: Experiment and theory journal January 2002
Obtaining correct orbital ground states in f -electron systems using a nonspherical self-interaction-corrected LDA + U method journal September 2009
First-principles thermodynamic framework for the evaluation of thermochemical H 2 O - or CO 2 -splitting materials journal December 2009
Self-consistent density functional calculations of the crystal field levels in lanthanide and actinide dioxides journal February 2012
Ab initio thermodynamics of intrinsic oxygen vacancies in ceria journal October 2012
Crystal-field interaction and oxygen stoichiometry effects in strontium-doped rare-earth cobaltates journal August 2014
Ordering of oxygen vacancies and excess charge localization in bulk ceria: A DFT + U study journal September 2014
Crystal-field calculations for transition-metal ions by application of an opposing potential journal February 2016
Generalized Gradient Approximation Made Simple journal October 1996
Configurational Electronic Entropy and the Phase Diagram of Mixed-Valence Oxides: The Case of Li x FePO 4 journal October 2006
Defect Structure and Electrical Properties of Nonstoichiometric CeO[sub 2] Single Crystals journal January 1979

Cited By (11)

Stabilization of the Oxidation State +IV in Siloxide‐Supported Terbium Compounds journal January 2020
Stabilization of the Oxidation State +IV in Siloxide‐Supported Terbium Compounds journal February 2020
Dynamic charge and oxidation state of Pt/CeO2 single-atom catalysts journal August 2019
The use of poly-cation oxides to lower the temperature of two-step thermochemical water splitting journal January 2018
BaCe 0.25 Mn 0.75 O 3−δ —a promising perovskite-type oxide for solar thermochemical hydrogen production journal January 2018
CeO 2−x quantum dots with massive oxygen vacancies as efficient catalysts for the synthesis of dimethyl carbonate journal January 2020
A review of defect structure and chemistry in ceria and its solid solutions journal January 2020
Communication: The electronic entropy of charged defect formation and its impact on thermochemical redox cycles journal February 2018
Ab initio calculation of the migration free energy of oxygen diffusion in pure and samarium-doped ceria journal January 2018
Ab initio calculation of the migration free energy of oxygen diffusion in pure and samarium-doped ceria text January 2018
A review of defect structure and chemistry in ceria and its solid solutions text January 2020

Similar Records

CeTi2O6—A Promising Oxide for Solar Thermochemical Hydrogen Production
Journal Article · Wed Apr 22 00:00:00 EDT 2020 · ACS Applied Materials and Interfaces · OSTI ID:1985161

Materials Design Directions for Solar Thermochemical Water Splitting
Other · Fri Apr 21 00:00:00 EDT 2023 · Solar Fuels · OSTI ID:1975942

Structural and catalytic properties of lanthanide (La, Eu, Gd) doped ceria
Journal Article · Mon Nov 14 23:00:00 EST 2011 · Journal of Solid State Chemistry · OSTI ID:21580070