DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: In-situ construction of ceria-metal/titanate heterostructure with controllable architectures for efficient fuel electrochemical conversion

Journal Article · · Applied Catalysis. B, Environmental

Construction of ceria-metal/titanate heterostructure via exsolution is a promising strategy to improve the catalytic activity of titanate perovskites and broaden their applications in various energy conversion scenarios. However, the species exsolved after reduction are limited to reducible metal cations, such as Ni, Co, Fe, and precious metals. Herein, we report a modified exsolution approach for co-exsolving active oxides and metal nanoparticles from a titanate perovskite, La0.8Ce0.1Ni0.4Ti0.6O3-δ (LCeNT). We highlight strained facet-specific CeO2 cubes can be grown on the support after an air-annealing process with their morphology tunable by varying annealing temperature, whilst exsolution of Ni nanoparticles form subsequently following chemical/electrical reduction. An electrolyte-supported SOFC utilizing CeO2-Ni@LCeNT anode achieves maximum power density of 642 mW cm-2 at 900 °C in H2 (~3% H2O). Exceptional robustness of the heterostructure is illustrated after running the cell in CH4 (~3% H2O) for 20 h. Here this work demonstrates an intriguing pathway to constructing stable and active ceria-metal/titanate heterostructure for energy applications.

Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
Engineering and Physical Sciences Research Council (EPSRC; USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC07-05ID14517
OSTI ID:
1961588
Report Number(s):
INL/JOU-20-57316-Rev000
Journal Information:
Applied Catalysis. B, Environmental, Journal Name: Applied Catalysis. B, Environmental Journal Issue: - Vol. 298; ISSN 0926-3373
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (70)

Effect of the support on the mechanism of partial oxidation of methane on platinum catalysts journal August 2006
Effects of Morphology of Cerium Oxide Catalysts for Reverse Water Gas Shift Reaction journal February 2016
TEM observation of gold nanoparticles deposited on cerium oxide journal June 2005
Rietveld refinement of the structure of CeOCI formed in Pd/CeO2 catalyst: Notes on the existence of a stabilized tetragonal phase of La2O3 in LaPdO system journal August 1992
Model calculations on some feasible two-step water splitting processes journal May 1993
Study on the reduction of Eu3+→Eu2+ in Sr4Al14O25: Eu prepared in air atmosphere journal March 2003
Electron energy-loss spectroscopy (EELS) study of oxidation states of Ce and U in pyrochlore and uraninite – natural analogues for Pu- and U-bearing waste forms journal February 1999
Determination of Ce4+/Ce3+ in electron-beam-damaged CeO2 by electron energy-loss spectroscopy journal December 1999
Thermal, electrical, and electrocatalytical properties of lanthanum-doped strontium titanate journal July 2002
Efficiency analysis for a manganese-oxide-based thermochemical cycle journal November 1999
High-temperature conversion of methane on a composite gadolinia-doped ceria–gold electrode journal November 1999
Pd catalysts for total oxidation of methane: Support effects journal April 2015
Electrochemical promotion of bulk lattice-oxygen extraction for syngas generation over Ni-GDC anodes in direct-methane SOFCs journal February 2008
Thermochemical Redox Cycles over Ce-based Oxides journal May 2015
Synthesis and electrocatalytic performance of La0.3Ce0.1Sr0.5Ba0.1TiO3 anode catalyst for solid oxide fuel cells journal June 2014
Electrical reduction of perovskite electrodes for accelerating exsolution of nanoparticles journal May 2019
Synthesis and characterization of NiO/GDC–GDC dual nano-composite powders for high-performance methane fueled solid oxide fuel cells journal August 2012
Comparative study of activity of cerium oxide at thermal reduction temperatures of 1300–1550 °C for solar thermochemical two-step water-splitting cycle journal November 2013
Advances in the development of titanates for anodes in SOFC journal May 2019
Mathematical modeling of Ni/GDC and Au–Ni/GDC SOFC anodes performance under internal methane steam reforming conditions journal October 2013
Ni-Substituted Sr(Ti,Fe)O3 SOFC Anodes: Achieving High Performance via Metal Alloy Nanoparticle Exsolution journal March 2018
Sr Segregation in Perovskite Oxides: Why It Happens and How It Exists journal August 2018
Factors in forming CO and CO2 over a cermet of Ni-gadolinia-doped ceria with relation to direct methane SOFCs journal December 2006
Effect of impregnation phases on the performance of Ni-based anodes for low temperature solid oxide fuel cells journal October 2011
Operational characteristics of thin film solid oxide fuel cells with ruthenium anode in natural gas journal December 2013
Comprehensive review of methane conversion in solid oxide fuel cells: Prospects for efficient electricity generation from natural gas journal May 2016
Perovskite oxides applications in high temperature oxygen separation, solid oxide fuel cell and membrane reactor: A review journal July 2017
Performance of La-doped strontium titanate (LST) anode on LaGaO3-based SOFC journal June 2009
A Ce/Ru Codoped SrFeO3−δ Perovskite for a Coke-Resistant Anode of a Symmetrical Solid Oxide Fuel Cell journal November 2020
In Situ Observation of Nanoparticle Exsolution from Perovskite Oxides: From Atomic Scale Mechanistic Insight to Nanostructure Tailoring journal October 2019
Lithium Lanthanum Titanates:  A Review journal October 2003
Electronic Structure, Defect Chemistry, and Transport Properties of SrTi 1 - x Fe x O 3 - y Solid Solutions journal August 2006
Structure and Microwave Dielectric Properties of Sr2+nCe2Ti5+nO15+3n (n ≤ 10) Homologous Series journal June 2007
Structure and Properties of La 0.4 Sr 0.4 TiO 3 Ceramics for Use as Anode Materials in Solid Oxide Fuel Cells journal September 2010
Synthesis and Study of a Ce-Doped La/Sr Titanate for Solid Oxide Fuel Cell Anode Operating Directly on Methane journal March 2011
Enhancing Electronic Conductivity in Strontium Titanates through Correlated A and B-Site Doping journal March 2011
Spillover in Heterogeneous Catalysis journal May 1995
Thermochemical Cycles for High-Temperature Solar Hydrogen Production journal October 2007
Cation Size Mismatch and Charge Interactions Drive Dopant Segregation at the Surfaces of Manganite Perovskites journal May 2013
Growth Kinetics of Individual Co Particles Ex-solved on SrTi 0.75 Co 0.25 O 3-δ Polycrystalline Perovskite Thin Films journal April 2019
Facet-Dependent in Situ Growth of Nanoparticles in Epitaxial Thin Films: The Role of Interfacial Energy journal April 2019
Reaction Pathways and Site Requirements for the Activation and Chemical Conversion of Methane on Ru−Based Catalysts journal June 2004
Analytical Model of CeO 2 Oxidation and Reduction journal November 2013
A review of anode materials development in solid oxide fuel cells journal July 2004
Switching on electrocatalytic activity in solid oxide cells journal August 2016
In situ growth of nanoparticles through control of non-stoichiometry journal October 2013
Exsolution trends and co-segregation aspects of self-grown catalyst nanoparticles in perovskites journal June 2017
Nano-socketed nickel particles with enhanced coking resistance grown in situ by redox exsolution journal September 2015
Evolution of the electrochemical interface in high-temperature fuel cells and electrolysers journal January 2016
Advanced anodes for high-temperature fuel cells journal January 2004
Demonstration of chemistry at a point through restructuring and catalytic activation at anchored nanoparticles journal November 2017
Step-change in high temperature steam electrolysis performance of perovskite oxide cathodes with exsolution of B-site dopants journal January 2013
A-site deficient perovskite: the parent for in situ exsolution of highly active, regenerable nano-particles as SOFC anodes journal January 2015
An ingenious Ni/Ce co-doped titanate based perovskite as a coking-tolerant anode material for direct hydrocarbon solid oxide fuel cells journal January 2015
Demonstration of high performance in a perovskite oxide supported solid oxide fuel cell based on La and Ca co-doped SrTiO 3 journal January 2016
Electronic structure of primary solid solutions in metals journal October 1954
High-resolution electron microscopy study of strained epitaxial La0.7Sr0.3MnO3thin films journal March 2000
X-ray absorption studies of CeO 2 , PrO 2 , and TbO 2 . I. Manifestation of localized and extended f states in the 3 d absorption spectra journal July 1987
GSAS-II : the genesis of a modern open-source all purpose crystallography software package journal March 2013
Surface Diffusion-Controlled Neck Growth Kinetics in Early Stage Sintering of Zirconia, with and without Applied DC Electrical Field journal November 2010
Electrical Properties and Dimensional Stability of Ce-Doped SrTiO3−δ for Solid Oxide Fuel Cell Applications journal March 2011
In-Situ Surface Analysis of SOFC Cathode Degradation Using High Temperature Environmental Scanning Electron Microscopy journal June 2015
(Invited) Effects of Microstructure on Surface Segregation: Role of Grain Boundaries journal April 2016
Thermodynamic Analysis of Carbon Deposition and Electrochemical Oxidation of Methane for SOFC Anodes journal January 2001
Electrical Properties of Yttrium-Doped Strontium Titanate under Reducing Conditions journal January 2002
Ceria Nanocoating for Sulfur Tolerant Ni-Based Anodes of Solid Oxide Fuel Cells journal January 2007
Evaluation of Ca Doped La0.2Sr0.7TiO3as an Alternative Material for Use in SOFC Anodes journal January 2012
A FIB-STEM Study of La0.8Sr0.2MnO3Cathode and Y2O3-ZrO2/Gd2O3-CeO2Electrolyte Interfaces of Solid Oxide Fuel Cells journal January 2017
Strontium titanate surfaces journal February 2007
A Review on Visible Light Active Perovskite-Based Photocatalysts journal December 2014