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

A robust and active hybrid catalyst for facile oxygen reduction in solid oxide fuel cells

Journal Article · · Energy & Environmental Science
DOI:https://doi.org/10.1039/c6ee03656b· OSTI ID:1491027
 [1];  [2];  [1];  [1];  [3];  [1];  [1];  [1];  [1];  [1];  [4];  [5];  [4];  [4];  [6];  [6];  [7];  [7];  [4];  [1]
  1. Georgia Inst. of Technology, Atlanta, GA (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); South China Univ. of Technology (SCUT), Guangzhou (China)
  3. SABIC Technology Center (Saudi Arabia)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  5. Materials Science and Engineering; Georgia Institute of Technology; Atlanta; USA
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  7. South China Univ. of Technology (SCUT), Guangzhou (China)
The sluggish oxygen reduction reaction (ORR) greatly reduces the energy efficiency of solid oxide fuel cells (SOFCs). In this work, we present our results in dramatically enhancing the ORR kinetics and durability of the state-of-the-art La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) cathode using a hybrid catalyst coating composed of a conformal PrNi0.5Mn0.5O3 (PNM) thin film with exsoluted PrOx nanoparticles. At 750 °C, the hybrid catalyst-coated LSCF cathode shows a polarization resistance of ~0.022 Ω cm2, about 1/6 of that for a bare LSCF cathode (~0.134 Ω cm2). Further, anode-supported cells with the hybrid catalyst-coated LSCF cathode demonstrate remarkable peak power densities (~1.21 W cm–2) while maintaining excellent durability (0.7 V for ~500 h). Near Ambient X-ray Photoelectron Spectroscopy (XPS) and Near Edge X-Ray Absorption Fine Structure (NEXAFS) analyses, together with density functional theory (DFT) calculations, imply that the oxygen-vacancy-rich surfaces of the PrOx nanoparticles greatly accelerate the rate of electron transfer in the ORR whereas the thin PNM film facilitates rapid oxide-ion transport while drastically enhancing the surface stability of the LSCF electrode.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
DOE Contract Number:
AC02-05CH11231; NT0006557; AR0000502; SC0002633
OSTI ID:
1491027
Journal Information:
Energy & Environmental Science, Journal Name: Energy & Environmental Science Journal Issue: 4 Vol. 10; ISSN 1754-5692; ISSN EESNBY
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English

References (49)

Rational design of novel cathode materials in solid oxide fuel cells using first-principles simulations journal March 2010
Deposition of Cr Species at (La,Sr)(Co,Fe)O[sub 3] Cathodes of Solid Oxide Fuel Cells journal January 2006
Measuring oxygen diffusion and oxygen surface exchange by conductivity relaxation journal November 2000
A high-performance cathode for the next generation of solid-oxide fuel cells journal September 2004
Degradation Mechanisms of La–Sr–Co–Fe–O[sub 3] SOFC Cathodes journal January 2006
Fuel Cells - Fundamentals and Applications journal May 2001
Materials for fuel-cell technologies journal November 2001
An X-ray absorption spectroscopic study on mixed conductive La0.6Sr0.4Co0.8Fe0.2O3−δ cathodes. I. Electrical conductivity and electronic structure journal January 2011
Computational Study on the Catalytic Mechanism of Oxygen Reduction on La0.5Sr0.5MnO3 in Solid Oxide Fuel Cells journal September 2007
Lowering the Temperature of Solid Oxide Fuel Cells journal November 2011
On the band gaps and electronic structure of thin single crystalline praseodymium oxide layers on Si(111)
  • Seifarth, O.; Dabrowski, J.; Zaumseil, P.
  • Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, Vol. 27, Issue 1 https://doi.org/10.1116/1.3021047
journal January 2009
Controlled-valence properties of La 1 − x Sr x FeO 3 and La 1 − x Sr x MnO 3 studied by soft-x-ray absorption spectroscopy journal August 1992
Electronic Structure of a "Poisoned" Transition-Metal Surface journal January 1984
Impact of Sr segregation on the electronic structure and oxygen reduction activity of SrTi1−xFexO3 surfaces journal January 2012
Electronic structure of PrNiO 3 studied by photoemission and x-ray-absorption spectroscopy: Band gap and orbital ordering journal November 1995
Improved chemical and electrochemical stability of perovskite oxides with less reducible cations at the surface journal June 2016
Quantum-mechanics-based design principles for solid oxide fuel cell cathode materials journal January 2011
Enhanced performance of LSCF cathode through surface modification journal May 2012
Promotion of water-mediated carbon removal by nanostructured barium oxide/nickel interfaces in solid oxide fuel cells journal June 2011
In-situ transmission electron microscopy study of oxygen vacancy ordering and dislocation annihilation in undoped and Sm-doped CeO 2 ceramics during redox processes journal December 2016
Suppression of Sr surface segregation in La 1−x Sr x Co 1−y Fe y O 3−δ : a first principles study journal January 2013
Electrochemical performance and stability of the cathode for solid oxide fuel cells: V. high performance and stable Pr2NiO4 as the cathode for solid oxide fuel cells journal June 2012
Nano-structured composite cathodes for intermediate-temperature solid oxide fuel cells via an infiltration/impregnation technique journal April 2010
Oxygen vacancy ordering in heavily rare-earth-doped ceria journal October 2006
Self-regeneration of a Pd-perovskite catalyst for automotive emissions control journal July 2002
Fast vacancy-mediated oxygen ion incorporation across the ceria–gas electrochemical interface journal July 2014
Surface Electronic Structure Transitions at High Temperature on Perovskite Oxides: The Case of Strained La 0.8 Sr 0.2 CoO 3 Thin Films journal November 2011
Prediction of solid oxide fuel cell cathode activity with first-principles descriptors journal January 2011
Chromium deposition and poisoning of cathodes of solid oxide fuel cells – A review journal January 2014
A direct-methane fuel cell with a ceria-based anode journal August 1999
An Octane-Fueled Solid Oxide Fuel Cell journal May 2005
Direct-methane solid oxide fuel cells with hierarchically porous Ni-based anode deposited with nanocatalyst layer journal November 2014
Nanostructured anodes for solid oxide fuel cells journal August 2009
Efficient Electro-Catalysts for Enhancing Surface Activity and Stability of SOFC Cathodes journal May 2013
Effect of Boron Deposition and Poisoning on the Surface Exchange Properties of LSCF Electrode Materials of Solid Oxide Fuel Cells journal January 2013
Decreasing the Polarization Resistance of (La,Sr)CrO 3−δ Solid Oxide Fuel Cell Anodes by Combined Fe and Ru Substitution journal May 2015
A Highly Efficient and Robust Nanofiber Cathode for Solid Oxide Fuel Cells journal November 2016
Enhancement of La0.6Sr0.4Co0.2Fe0.8O3-δ durability and surface electrocatalytic activity by La0.85Sr0.15MnO3±δ investigated using a new test electrode platform journal January 2011
Mechanism for enhanced oxygen reduction kinetics at the (La,Sr)CoO3−δ/(La,Sr)2CoO4+δ hetero-interface journal January 2012
Unreliability of simultaneously determining kchem and Dchem via conductivity relaxation for surface-modified La0.6Sr0.4Co0.2Fe0.8O3−δ journal October 2010
Growth of praseodymium oxide on Si(111) under oxygen-deficient conditions journal July 2009
Enhancing SOFC cathode performance by surface modification through infiltration journal January 2014
Enhanced Sulfur and Coking Tolerance of a Mixed Ion Conductor for SOFCs: BaZr0.1Ce0.7Y0.2–xYbxO3–δ journal October 2009
In situ growth of nanoparticles through control of non-stoichiometry journal October 2013
Redox activity of surface oxygen anions in oxygen-deficient perovskite oxides during electrochemical reactions journal January 2015
Cation Size Mismatch and Charge Interactions Drive Dopant Segregation at the Surfaces of Manganite Perovskites journal May 2013
Kinetics of Oxygen Surface Exchange on Epitaxial Ruddlesden–Popper Phases and Correlations to First-Principles Descriptors journal January 2016
Low temperature solid oxide fuel cells with hierarchically porous cathode nano-network journal September 2014
Cr Poisoning Suppression in Solid Oxide Fuel Cells Using LaNi(Fe)O[sub 3] Electrodes journal January 2006

Similar Records

Catalyst coating of a perovskite film and particles exsoluted from the perovskite film
Patent · Tue May 25 00:00:00 EDT 2021 · OSTI ID:1824000

An In Situ Formed, Dual-Phase Cathode with a Highly Active Catalyst Coating for Protonic Ceramic Fuel Cells
Journal Article · Sun Dec 03 19:00:00 EST 2017 · Advanced Functional Materials · OSTI ID:1537346

An effective strategy to enhancing tolerance to contaminants poisoning of solid oxide fuel cell cathodes
Journal Article · Wed Mar 14 20:00:00 EDT 2018 · Nano Energy · OSTI ID:1538633

Related Subjects