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Williams NJ, Osborne C, Seymour ID, Bazant MZ, Skinner SJ. Application of finite Gaussian process distribution of relaxation times on SOFC electrodes. Electrochem commun 2023. [DOI: 10.1016/j.elecom.2023.107458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023] Open
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2
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Baharuddin NA, Rahman HA, Samat AA, Osman N, Mohd Affandi NS, Safian SD. Perovskite-structured ceramics in solid oxide fuel cell application. PEROVSKITE CERAMICS 2023:221-261. [DOI: 10.1016/b978-0-323-90586-2.00006-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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3
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Solid-State Electrochemistry and Solid Oxide Fuel Cells: Status and Future Prospects. ELECTROCHEM ENERGY R 2022. [DOI: 10.1007/s41918-022-00160-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
AbstractSolid-state electrochemistry (SSE) is an interdisciplinary field bridging electrochemistry and solid-state ionics and deals primarily with the properties of solids that conduct ions in the case of ionic conducting solid electrolytes and electrons and/or electron holes in the case of mixed ionic and electronic conducting materials. However, in solid-state devices such as solid oxide fuel cells (SOFCs), there are unique electrochemical features due to the high operating temperature (600–1 000 °C) and solid electrolytes and electrodes. The solid-to-solid contact at the electrode/electrolyte interface is one of the most distinguished features of SOFCs and is one of the fundamental reasons for the occurance of most importance phenomena such as shift of the equipotential lines, the constriction effect, polarization-induced interface formation, etc. in SOFCs. The restriction in placing the reference electrode in solid electrolyte cells further complicates the SSE in SOFCs. In addition, the migration species at the solid electrode/electrolyte interface is oxygen ions, while in the case of the liquid electrolyte system, the migration species is electrons. The increased knowledge and understanding of SSE phenomena have guided the development of SOFC technologies in the last 30–40 years, but thus far, no up-to-date reviews on this important topic have appeared. The purpose of the current article is to review and update the progress and achievements in the SSE in SOFCs, largely based on the author’s past few decades of research and understanding in the field, and to serve as an introduction to the basics of the SSE in solid electrolyte devices such as SOFCs.
Graphical abstract
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Marmet P, Holzer L, Grolig JG, Bausinger H, Mai A, Brader JM, Hocker T. Modeling the impedance response and steady state behaviour of porous CGO-based MIEC anodes. Phys Chem Chem Phys 2021; 23:23042-23074. [PMID: 34613322 DOI: 10.1039/d1cp01962g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mixed ionic and electronic conducting (MIEC) materials recently gained much interest for use as anodes in solid oxide fuel cell (SOFC) applications. However, many processes in MIEC-based porous anodes are still poorly understood and the appropriate interpretation of corresponding electrochemical impedance spectroscopy (EIS) data is challenging. Therefore, a model which is capable to capture all relevant physico-chemical processes is a crucial prerequisite for systematic materials optimization. In this contribution we present a comprehensive model for MIEC-based anodes providing both the DC-behaviour and the EIS-spectra. The model enables one to distinguish between the impact of the chemical capacitance, the reaction resistance, the gas impedance and the charge transport resistance on the EIS-spectrum and therewith allows its appropriate interpretation for button cell conditions. Typical MIEC-features are studied with the model applied to gadolinium doped ceria (CGO) anodes with different microstructures. The results obtained for CGO anodes reveal the spatial distribution of the reaction zone and associated transport distances for the charge carriers and gas species. Moreover, parameter spaces for transport limited and surface reaction limited situations are depicted. By linking bulk material properties, microstructure effects and the cell design with the cell performance, we present a way towards a systematic materials optimization for MIEC-based anodes.
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Affiliation(s)
- Philip Marmet
- Zurich University of Applied Sciences, Institute of Computational Physics, Winterthur, Switzerland.
| | - Lorenz Holzer
- Zurich University of Applied Sciences, Institute of Computational Physics, Winterthur, Switzerland.
| | | | | | | | - Joseph M Brader
- Department of Physics, University of Fribourg, Fribourg, Switzerland
| | - Thomas Hocker
- Zurich University of Applied Sciences, Institute of Computational Physics, Winterthur, Switzerland.
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The Gaussian process distribution of relaxation times: A machine learning tool for the analysis and prediction of electrochemical impedance spectroscopy data. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2019.135316] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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8
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A general model for the impedance of batteries and supercapacitors: The non-linear distribution of diffusion times. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.134853] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Li X, Ahmadi M, Collins L, Kalinin SV. Deconvolving distribution of relaxation times, resistances and inductance from electrochemical impedance spectroscopy via statistical model selection: Exploiting structural-sparsity regularization and data-driven parameter tuning. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.05.010] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Tabish A, Patel H, Schoonman J, Aravind P. A detailed look into hydrogen electrochemical oxidation on ceria anodes. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.05.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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11
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Liu J, Ciucci F. Modeling the impedance spectra of mixed conducting thin films with exposed and embedded current collectors. Phys Chem Chem Phys 2017; 19:26310-26321. [DOI: 10.1039/c7cp03703a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article studies the electrochemical impedance spectroscopy response of mixed ionic-electronic conducting (MIEC) films with embedded current collectors (CCs). Even though the MIEC surface is fully exposed, the impact of the CCs can be significant.
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Affiliation(s)
- Jiapeng Liu
- Department of Mechanical and Aerospace Engineering
- The Hong Kong University of Science and Technology
- China
| | - Francesco Ciucci
- Department of Mechanical and Aerospace Engineering
- The Hong Kong University of Science and Technology
- China
- Department of Chemical and Biomolecular Engineering
- The Hong Kong University of Science and Technology
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12
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Guan Z, Chen D, Chueh WC. Analyzing the dependence of oxygen incorporation current density on overpotential and oxygen partial pressure in mixed conducting oxide electrodes. Phys Chem Chem Phys 2017; 19:23414-23424. [DOI: 10.1039/c7cp03654j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxygen incorporation reaction involves the transformation of an oxygen gas molecule to two lattice oxygen ions in a mixed ionic and electronic conducting solid. The current density is modeled as functions of both oxygen partial pressure and overpotential.
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Affiliation(s)
- Zixuan Guan
- Department of Applied Physics
- Stanford University
- Stanford
- USA
| | - Di Chen
- Department of Materials Science and Engineering
- Stanford University
- Stanford
- USA
| | - William C. Chueh
- Department of Materials Science and Engineering
- Stanford University
- Stanford
- USA
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13
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Kishimoto M, Lomberg M, Ruiz-Trejo E, Brandon NP. Numerical modeling of nickel-infiltrated gadolinium-doped ceria electrodes reconstructed with focused ion beam tomography. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2015.12.044] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Patel HC, Tabish AN, Aravind PV. Modelling of elementary kinetics of H2 and CO oxidation on ceria pattern cells. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.09.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Ding J, Strelcov E, Kalinin SV, Bassiri-Gharb N. Spatially Resolved Probing of Electrochemical Reactions via Energy Discovery Platforms. NANO LETTERS 2015; 15:3669-3676. [PMID: 26027805 DOI: 10.1021/acs.nanolett.5b01613] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The electrochemical reactivity of solid surfaces underpins functionality of a broad spectrum of materials and devices ranging from energy storage and conversion, to sensors and catalytic devices. The surface electrochemistry is, however, a complex process, controlled by the interplay of charge generation, field-controlled and diffusion-controlled transport. Here we explore the fundamental mechanisms of electrochemical reactivity on nanocrystalline ceria, using the synergy of nanofabricated devices and time-resolved Kelvin probe force microscopy (tr-KPFM), an approach we refer to as energy discovery platform. Through tr-KPFM, the surface potential mapping in both the space and time domains and current variation over time are obtained, enabling analysis of local ionic and electronic transport and their dynamic behavior on the 10 ms to 10 s scale. Based on their different responses in the time domain, conduction mechanisms can be separated and identified in a variety of environmental conditions, such as humidity and temperature. The theoretical modeling of ion transport through finite element method allows for creation of a minimal model consistent with observed phenomena, and establishing of the dynamic characteristics of the process, including mobility and diffusivity of charged species. The future potential of the energy discovery platforms is also discussed.
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Affiliation(s)
- Jilai Ding
- †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Evgheni Strelcov
- ‡Institute for Functional Imaging of Materials and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Sergei V Kalinin
- ‡Institute for Functional Imaging of Materials and Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Nazanin Bassiri-Gharb
- †School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- §G. W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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Analysis of Electrochemical Impedance Spectroscopy Data Using the Distribution of Relaxation Times: A Bayesian and Hierarchical Bayesian Approach. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.03.123] [Citation(s) in RCA: 178] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Moya AA. Theory of the formation of the electric double layer at the ion exchange membrane-solution interface. Phys Chem Chem Phys 2015; 17:5207-18. [PMID: 25600122 DOI: 10.1039/c4cp05702c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work aims to extend the study of the formation of the electric double layer at the interface defined by a solution and an ion-exchange membrane on the basis of the Nernst-Planck and Poisson equations, including different values of the counter-ion diffusion coefficient and the dielectric constant in the solution and membrane phases. The network simulation method is used to obtain the time evolution of the electric potential, the displacement electric vector, the electric charge density and the ionic concentrations at the interface between a binary electrolyte solution and a cation-exchange membrane with total co-ion exclusion. The numerical results for the temporal evolution of the interfacial electric potential and the surface electric charge are compared with analytical solutions derived in the limit of the shortest times by considering the Poisson equation for a simple cationic diffusion process. The steady-state results are justified from the Gouy-Chapman theory for the diffuse double layer in the limits of similar and high bathing ionic concentrations with respect to the fixed-charge concentration inside the membrane. Interesting new physical insights arise from the interpretation of the process of the formation of the electric double layer at the ion exchange membrane-solution interface on the basis of a membrane model with total co-ion exclusion.
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Affiliation(s)
- A A Moya
- Universidad de Jaén, Departamento de Física, Edificio A-3, Campus Universitario de Las Lagunillas - 23071 Jaén, Spain.
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Oh TS, Haile SM. Electrochemical behavior of thin-film Sm-doped ceria: insights from the point-contact configuration. Phys Chem Chem Phys 2015; 17:13501-11. [DOI: 10.1039/c4cp05990e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electrochemical behavior of chemical vapor deposition (CVD) grown porous films of Sm-doped ceria (SDC) for hydrogen oxidation has been evaluated by impedance spectroscopy using a point contact geometry at a temperature of 650 °C.
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Affiliation(s)
- Tae-Sik Oh
- California Institute of Technology
- Materials Science
- Pasadena
- USA
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Yang N, Belianinov A, Strelcov E, Tebano A, Foglietti V, Di Castro D, Schlueter C, Lee TL, Baddorf AP, Balke N, Jesse S, Kalinin SV, Balestrino G, Aruta C. Effect of doping on surface reactivity and conduction mechanism in samarium-doped ceria thin films. ACS NANO 2014; 8:12494-12501. [PMID: 25415828 DOI: 10.1021/nn505345c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A systematic study by reversible and hysteretic electrochemical strain microscopy (ESM) in samples of cerium oxide with different Sm content and in several working conditions allows disclosing the microscopic mechanism underlying the difference in electrical conduction mechanism and related surface activity, such as water adsorption and dissociation with subsequent proton liberation. We have measured the behavior of the reversible hysteresis loops by changing temperature and humidity, both in standard ESM configuration and using the first-order reversal curve method. The measurements have been performed in much smaller temperature ranges with respect to alternative measuring techniques. Complementing our study with hard X-ray photoemission spectroscopy and irreversible scanning probe measurements, we find that water incorporation is favored until the doping with Sm is too high to allow the presence of Ce3+. The influence of doping on the surface reactivity clearly emerges from all of our experimental results. We find that at lower Sm concentration, proton conduction is prevalent, featured by lower activation energy and higher electrical conductivity. Defect concentrations determine the type of the prevalent charge carrier in a doping dependent manner.
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Affiliation(s)
- Nan Yang
- National Research Council CNR-SPIN, University of Roma "Tor Vergata" , Rome I-00133, Italy
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Optimal Regularization in Distribution of Relaxation Times applied to Electrochemical Impedance Spectroscopy: Ridge and Lasso Regression Methods - A Theoretical and Experimental Study. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.09.058] [Citation(s) in RCA: 154] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Nenning A, Opitz AK, Huber TM, Fleig J. A novel approach for analyzing electrochemical properties of mixed conducting solid oxide fuel cell anode materials by impedance spectroscopy. Phys Chem Chem Phys 2014; 16:22321-36. [PMID: 25219525 DOI: 10.1039/c4cp02467b] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
For application of acceptor-doped mixed conducting oxides as solid oxide fuel cell (SOFC) anodes, high electrochemical surface activity as well as acceptable electronic and ionic conductivity are crucial. In a reducing atmosphere, particularly the electronic conductivity of acceptor-doped oxides can become rather low and the resulting complex interplay of electrochemical reactions and charge transport processes makes a mechanistic interpretation of impedance measurements very complicated. In order to determine all relevant resistive and capacitive contributions of mixed conducting electrodes in a reducing atmosphere, a novel electrode design and impedance-based analysis technique is therefore introduced. Two interdigitating metallic current collectors are placed in a microelectrode, which allows in-plane measurements within the electrode as well as electrochemical measurements versus a counter electrode. Equivalent circuit models for quantifying the spectra of both measurement modes are developed and applied to simultaneously fit both spectra, using the same parameter set. In this manner, the electronic and ionic conductivity of the material as well as the area-specific resistance of the surface reaction and the chemical capacitance can be determined on a single microelectrode in a H2-H2O atmosphere. The applicability of this new tool was demonstrated in SrTi0.7Fe0.3O(3-δ) (STFO) thin film microelectrodes, deposited on single-crystalline yttria-stabilized zirconia (YSZ) substrates. All materials parameters that contribute to the polarization resistance of STFO electrodes in a reducing atmosphere could thus be quantified.
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Affiliation(s)
- A Nenning
- Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria.
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22
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Chen C, Chen D, Chueh WC, Ciucci F. Modeling the impedance response of mixed-conducting thin film electrodes. Phys Chem Chem Phys 2014; 16:11573-83. [DOI: 10.1039/c4cp01285b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Tamm K, Küngas R, Gorte R, Lust E. Solid oxide fuel cell anodes prepared by infiltration of strontium doped lanthanum vanadate into doped ceria electrolyte. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.05.127] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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24
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Revisiting parameter identification in electrochemical impedance spectroscopy: Weighted least squares and optimal experimental design. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.09.073] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Ye X, Melas-Kyriazi J, Feng ZA, Melosh NA, Chueh WC. A semiconductor/mixed ion and electron conductor heterojunction for elevated-temperature water splitting. Phys Chem Chem Phys 2013; 15:15459-69. [DOI: 10.1039/c3cp52536h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Chueh WC, Haile SM. Electrochemistry of Mixed Oxygen Ion and Electron Conducting Electrodes in Solid Electrolyte Cells. Annu Rev Chem Biomol Eng 2012; 3:313-41. [DOI: 10.1146/annurev-chembioeng-073009-101000] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Sossina M. Haile
- Materials Science, California Institute of Technology, Pasadena, California 91125;
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Chueh WC, Hao Y, Jung W, Haile SM. High electrochemical activity of the oxide phase in model ceria-Pt and ceria-Ni composite anodes. NATURE MATERIALS 2011; 11:155-161. [PMID: 22138788 DOI: 10.1038/nmat3184] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 10/26/2011] [Indexed: 05/31/2023]
Abstract
Fuel cells, and in particular solid-oxide fuel cells (SOFCs), enable high-efficiency conversion of chemical fuels into useful electrical energy and, as such, are expected to play a major role in a sustainable-energy future. A key step in the fuel-cell energy-conversion process is the electro-oxidation of the fuel at the anode. There has been increasing evidence in recent years that the presence of CeO(2)-based oxides (ceria) in the anodes of SOFCs with oxygen-ion-conducting electrolytes significantly lowers the activation overpotential for hydrogen oxidation. Most of these studies, however, employ porous, composite electrode structures with ill-defined geometry and uncontrolled interfacial properties. Accordingly, the means by which electrocatalysis is enhanced has remained unclear. Here we demonstrate unambiguously, through the use of ceria-metal structures with well-defined geometries and interfaces, that the near-equilibrium H(2) oxidation reaction pathway is dominated by electrocatalysis at the oxide/gas interface with minimal contributions from the oxide/metal/gas triple-phase boundaries, even for structures with reaction-site densities approaching those of commercial SOFCs. This insight points towards ceria nanostructuring as a route to enhanced activity, rather than the traditional paradigm of metal-catalyst nanostructuring.
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Affiliation(s)
- William C Chueh
- Materials Science, California Institute of Technology, Pasadena, California 91125, USA
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28
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Measuring oxygen reduction/evolution reactions on the nanoscale. Nat Chem 2011; 3:707-13. [DOI: 10.1038/nchem.1112] [Citation(s) in RCA: 213] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Accepted: 07/07/2011] [Indexed: 11/08/2022]
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29
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Reducing error and measurement time in impedance spectroscopy using model based optimal experimental design. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.02.098] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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