Academic literature on the topic 'Triple phase boundary (TPB)'

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Journal articles on the topic "Triple phase boundary (TPB)"

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Zhang, Shidong, Kai Wang, Shangzhe Yu, et al. "Multiscale and Multiphysical Numerical Simulations of Solid Oxide Cell (SOC)." ECS Transactions 111, no. 6 (2023): 937–54. http://dx.doi.org/10.1149/11106.0937ecst.

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This study presents a novel model for investigating the microstructural evolution of nickel (Ni), yttria-stabilized zirconia (YSZ), and gas phases in a solid oxide cell (SOC), and its effects on cell performance. The triple-phase-boundary (TPB), which is the interface between the three phases, plays a crucial role in the electrochemical reaction of the SOC. However, during operation, nickel particles coarsen or migrate, leading to the redistribution of the TPB. To study this phenomenon, a phase field method was utilized to simulate the fuel electrode's detailed structure, and an approach was d
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Wakamatsu, Katsuhiro, Takaaki Yasuda, Yuji Okada, and Teppei Ogura. "First-Principles Studies for Optimal Model of the Ni/YSZ Triple Phase Boundary in Solid Oxide Cells." ECS Transactions 111, no. 6 (2023): 1333–46. http://dx.doi.org/10.1149/11106.1333ecst.

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To resolve the existing issues of solid oxide cells such as degradation and efficiency improvement, it is essential to understand reaction mechanisms on the surface/interface such as triple phase boundary (TPB) as a highly active site that consists of catalysts, electrolytes, and gas phases. However, the reliable TPB model has not been still uniquely defined to discuss the property. In this study, we have focused on the TPB model comprising Ni catalysts, yttria-stabilized zirconia (YSZ) electrolytes, and gas phases and aimed to theoretically identify a reliable TPB model. In concrete, we ident
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Putri, Rihan Amila, Dani Gustaman Syarif, and Atiek Rostika Noviyanti. "Correlation Microstructure of Triple Phase Boundary and Crystallinity in SOFC Cells NiO/LSGM/LCM." Research Journal of Chemistry and Environment 26, no. 8 (2022): 44–50. http://dx.doi.org/10.25303/2608rjce044050.

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The electrochemical process in the TPB microstructure depends on the conductivity of the SOFC cell constituent materials. Electrolyte and electrode materials must have good conductivity. The crystallinity of an electrolyte can affect its conductivity. In this study, the electrolyte La0.8Sr0.2Ga0.8Mg0.2O3–δ (LSGM) was used and is known to have good conductivity at intermediate temperatures. The single cell of LSGM electrolyte with La0.7Ca0.3MnO3 (LCM) cathode which has high electronic conductivity and NiO anode which has low area-specific resistance (ASR) is expected to produce compatible cells
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Rix, Jillian G., Boshan Mo, Alexey Y. Nikiforov, Uday B. Pal, Srikanth Gopalan, and Soumendra N. Basu. "Quantifying Percolated Triple Phase Boundary Density and Its Effects on Anodic Polarization in Ni-Infiltrated Ni/YSZ SOFC Anodes." Journal of The Electrochemical Society 168, no. 11 (2021): 114507. http://dx.doi.org/10.1149/1945-7111/ac3599.

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Increasing the density of percolated triple phase boundaries (TPBs) by infiltrating nanoscale electrocatalysts can improve the performance of solid oxide fuel cell (SOFC) anodes. However, the complex microstructure of these infiltrated nanocatalysts creates challenges in quantifying their role in anode performance improvements. In this research, scanning electron microscopy of fractured cross-sections of a Ni-nanocatalyst infiltrated anodic symmetric cell along with three-dimensional (3-D) reconstruction of the same anode have been used to quantify the changes in percolated TPB densities due t
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Wilson, James R., Marcio Gameiro, Konstantin Mischaikow, William Kalies, Peter W. Voorhees, and Scott A. Barnett. "Three-Dimensional Analysis of Solid Oxide Fuel Cell Ni-YSZ Anode Interconnectivity." Microscopy and Microanalysis 15, no. 1 (2009): 71–77. http://dx.doi.org/10.1017/s1431927609090096.

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AbstractA method is described for quantitatively analyzing the level of interconnectivity of solid-oxide fuel cell electrode phases. The method was applied to the three-dimensional microstructure of a Ni–Y2O3-stabilized ZrO2 (Ni-YSZ) anode active layer measured by focused ion beam scanning electron microscopy. Each individual contiguous network of Ni, YSZ, and porosity was identified and labeled according to whether it was contiguous with the rest of the electrode. It was determined that the YSZ phase was 100% connected, whereas at least 86% of the Ni and 96% of the pores were connected. Tripl
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Kong, Wei, Mengtong Zhang, Zhen Han, and Qiang Zhang. "A Theoretical Model for the Triple Phase Boundary of Solid Oxide Fuel Cell Electrospun Electrodes." Applied Sciences 9, no. 3 (2019): 493. http://dx.doi.org/10.3390/app9030493.

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Electrospinning is a new state-of-the-art technology for the preparation of electrodes for solid oxide fuel cells (SOFC). Electrodes fabricated by this method have been proven to have an experimentally superior performance compared with traditional electrodes. However, the lack of a theoretic model for electrospun electrodes limits the understanding of their benefits and the optimization of their design. Based on the microstructure of electrospun electrodes and the percolation threshold, a theoretical model of electrospun electrodes is proposed in this study. Electrospun electrodes are compare
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Gao, Min, Cheng Xin Li, Ming De Wang, Hua Lei Wang, and Chang Jiu Li. "Influence of the Surface Roughness of Plasma-Sprayed YSZ on LSM Cathode Polarization in Solid Oxide Fuel Cells." Key Engineering Materials 373-374 (March 2008): 641–44. http://dx.doi.org/10.4028/www.scientific.net/kem.373-374.641.

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Under SOFCs operating condition, the cathode reaction rate is determined by triple phase boundary (TPB) areas which are associated with the geometry of the interface between the cathode and the electrolyte. In this paper, YSZ electrolyte was deposited by atmospheric plasma spraying (APS). A nano-scaled lanthanum strontium manganate (LSM) cathode was prepared by sol-gel process on APS YSZ with different surface roughness to aim at increasing the TPB. The polarization curves of LSM cathode were characterized by potentiostat. The influence of the roughness of APS YSZ on the polarization of LSM ca
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Shaikh Abdul, Muhammed Ali, Ahmad Zubair Yahaya, Mustafa Anwar, Mun Teng Soo, Andanastuti Muchtar, and Vadim M. Kovrugin. "Effect of Synthesis Method of Nickel–Samarium-Doped Ceria Anode on Distribution of Triple-Phase Boundary and Electrochemical Performance." Crystals 11, no. 5 (2021): 513. http://dx.doi.org/10.3390/cryst11050513.

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Two-dimensional (2D) electron back scattered diffraction (EBSD) is a powerful tool for microstructural characterization of crystalline materials. EBSD enables visualization and quantification of the effect of synthesis methods on the microstructure of individual grains, thus correlating the microstructure to mechanical and electrical efficiency. Therefore, this work was designed to investigate the microstructural changes that take place in the Ni-SDC cermet anode under different synthesis methods, such as the glycine–nitrate process (GNP) and ball-milling. EBSD results revealed that different
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Wakamatsu, Katsuhiro, Takaaki Yasuda, Yuji Okada, and Teppei Ogura. "First-Principles Studies for Optimal Model of the Ni/YSZ Triple Phase Boundary in Solid Oxide Cells." ECS Meeting Abstracts MA2023-01, no. 54 (2023): 207. http://dx.doi.org/10.1149/ma2023-0154207mtgabs.

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Non-Faradaic electrochemical modification of catalytic activity (NEMCA) with electric field applications in solid oxide cells (SOCs) is thought to be induced by spillover effects of lattice oxygen from the bulk, although the detailed mechanism has not still been clear. In SOCs, important phenomena such as fuel decomposition, charge transfer, etc. occur at the triple phase boundary (TPB) as a highly active site that consists of catalyst, electrolyte, and gas phases. NEMCA is expected to be also induced strongly by the surface mechanism on TPB, and understanding surface reactions on TPB is essen
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Jeong, Davin, Yonghyun Lim, Hyeontaek Kim, Yongchan Park, and Soonwook Hong. "Silver and Samaria-Doped Ceria (Ag-SDC) Cermet Cathode for Low-Temperature Solid Oxide Fuel Cells." Nanomaterials 13, no. 5 (2023): 886. http://dx.doi.org/10.3390/nano13050886.

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This study demonstrated a silver (Ag) and samarium-doped ceria (SDC) mixed ceramic and metal composite (i.e., cermet) as a cathode for low-temperature solid oxide fuel cells (LT-SOFCs). Introducing the Ag-SDC cermet cathode for LT-SOFCs revealed that the ratio between Ag and SDC, which is a crucial factor for catalytic reactions, can be tuned by the co-sputtering process, resulting in enhanced triple phase boundary (TPB) density in the nanostructure. Ag-SDC cermet not only successfully performed as a cathode to increase the performance of LT-SOFCs by decreasing polarization resistance but also
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Dissertations / Theses on the topic "Triple phase boundary (TPB)"

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Soltanzadeh, Marjan. "Modeling Triple Phase Boundary (TPB) in Solid Oxide Fuel Cell (SOFC) Anode." Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/28843.

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The idea of having the triple phase boundary (TPB) is extensively used in the fuel cell literature, especially with respect to solid oxide fuel cells (SOFC). The TPB concept indicates that the hydrogen oxidation reaction and the oxygen reduction reaction, which produce electric current, can actually occur at special sites, called "triple phase boundaries" where the gaseous fuel phase, ion conducting phase: electrolyte, and electron conducting phase, come into contact. Recent study shows that despite the common assumption about TPB, it is not just a point, but a zone that consists of two lines.
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Watkins, John D. "Enhancing triple phase boundary electrosynthesis." Thesis, University of Bath, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.547876.

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The first part of this thesis is concerned with the synthesis, characterisation and applications of surface functionalised carbon nanoparticles. Synthetic techniques are used to modify the existing surface architecture of carbon nanoparticles towards high surface area modified electrodes and pH sensing applications. Electrochemical and synthetic techniques have been used to study triple phase boundaries and enhance their properties towards a bulk synthetic technique, in which an electrolyte phase and redox probe phase are held separate. A salt matrix, ultrasound, high shear force and a carbon
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Turtayeva, Zarina. "Genesis of AEMFC (anion exchange membrane fuel cell) at the lab scale : from PEMFC’s inks composition toward fuel cell bench tests in alkaline media." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0285.

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Les piles à combustible à membrane échangeuse d'anions (AEMFC) ont récemment attiré l'attention en tant que piles à combustible alternatives à faible coût aux piles à combustible à membrane échangeuse de protons traditionnelles en raison de l'utilisation possible d'électrocatalyseurs non-nobles. Bien que l'AEMFC ressemble à la PEMFC, les problèmes de gestion de l'eau sont plus prégnants dans une AEMFC car l'ORR en milieu alcalin nécessite de l'eau, tandis qu'en même temps, de l'eau est produite en grande quantité du côté de l'anode. Pour mieux comprendre la gestion de l'eau dans ce type de pil
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Collins, Andrew. "Photo-electrochemical processes at the triple phase boundary." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557818.

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The main aim and ultimate final goal of the work carried out in this thesis is a drive towards a feasible system for light harvesting, which is in short, using the Sun’s energy to create electricity or a fuel for our energy requirements here on Earth. This work will see an approach using the triple phase boundary afforded by a microdroplet array. Although light harvesting is an ambition which has seen decades of work and uncountable man-hours, approaching it from the angle of utilizing the triple phase boundary between two immiscible liquids and a solid electrode is a new, and novel concept. B
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Wang, Chingfu. "Triple phase boundary engineering of electrodes for solid oxide fuel cells by inkjet printing." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708301.

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Ye, Haihui. "Microstructure and chemistry of grain-boundary films and triple-junction phases in liquid-phase sintered SiC ceramics." [S.l. : s.n.], 2002. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB9831555.

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Ye, Haihui [Verfasser]. "Microstructure and chemistry of grain boundary films and triple junction phases in liquid phase sintered SiC ceramics / Institut für Nichtmetallische Anorganische Materialien der Universität Stuttgart ... Vorgelegt von Haihui Ye." Stuttgart : Max-Planck-Inst. für Metallforschung, 2002. http://d-nb.info/964301148/34.

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Parikh, Harshil R. "Microstructure Changes In Solid Oxide Fuel Cell Anodes After Operation, Observed Using Three-Dimensional Reconstruction And Microchemical Analysis." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1417765534.

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Noël, Emeline. "Simulation numérique directe d’écoulements à l’aide d’une méthode de frontière immergée." Thesis, Rouen, INSA, 2012. http://www.theses.fr/2012ISAM0020/document.

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Les travaux menés, depuis plusieurs années, au CORIA ont abouti à la construction d’un outil numérique (ARCHER) permettant la simulation numérique directe d’écoulements diphasiques et notamment l’atomisation d’un jet liquide à haute vitesse. Ce type de simulation permet de capturer les phénomènes d’atomisation au voisinage de l’injecteur difficilement caractérisables par les outils expérimentaux actuels. Ces simulations requièrent des conditions d’injection délicates à évaluer a priori car elles dépendent des caractéristiques de l’écoulement au sein de l’injecteur. Or, certains jets présentent
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Ramasamy, Devaraj. "Extension of electrochemically active sites in SOFCs and SOECs." Doctoral thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/14813.

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Doutoramento em Nanociências e Nanotecnologia<br>Solid oxide fuel (SOFCs) and electrolyzer (SOECs) cells have been promoted as promising technologies for the stabilization of fuel supply and usage in future green energy systems. SOFCs are devices that produce electricity by the oxidation of hydrogen or hydrocarbon fuels with high efficiency. Conversely, SOECs can offer the reverse reaction, where synthetic fuels can be generated by the input of renewable electricity. Due to this similar but inverse nature of SOFCs and SOECs, these devices have traditionally been constructed from compara
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Book chapters on the topic "Triple phase boundary (TPB)"

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Munakata, Hirokazu, Masashi Otani, Yuki Katsuki, and Kiyoshi Kanamura. "Creation of Triple-Phase-Boundary in a Solid Oxide Fuel Cell Using a Three-Dimensionally Ordered Structure." In Ceramic Transactions Series. John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470917145.ch35.

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Lock, G. S. H. "The Evaporative, Tubular Thermosyphon." In The Tubular Thermosyphon. Oxford University PressOxford, 1992. http://dx.doi.org/10.1093/oso/9780198562474.003.0003.

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Abstract Above the critical pressure, the tubular thermosyphon behaves as a singlephase system. The same is often true below the critical pressure provided that the fluid specific volume is very much different from the critical value. As Fig. 3.1 indicates, v≪vcr corresponds to a liquid-filled device while v≫vcr corresponds to a gas-filled device unless the pressure is very low, that is P≪Pcr Under such single-phase conditions, the descriptions presented in the previous chapter continue to apply. If the critical point is approached in these circumstances, the behaviour of the system changes bu
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Ryan, Paul D., and John F. Dewey. "The Ordovician South Mayo Trough, a basin that recorded the passage of a triple junction along the Laurentian margin." In Laurentia: Turning Points in the Evolution of a Continent. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.1220(29).

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ABSTRACT Tectonic models for arc-continent collision can be overly complex where, for example, diachronous sedimentation and deformation along a single plate boundary are attributed to separate tectonic events. Furthermore, continuous sedimentation in a single basin recording a diachronous collision along a plate margin makes it difficult to use classical unconformable relationships to date an orogenic phase. In this chapter, we describe the Ordovician South Mayo Trough of western Ireland, a remarkable example of such a basin. It originated in the late Cambrian–Early Ordovician as a Laurentia-
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Conference papers on the topic "Triple phase boundary (TPB)"

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Tarzimoghadam, Zahra, Dirk Ponge, Jutta Kloewer, and Dierk Raabe. "Hydrogen-assisted Failure in Nickel Base Alloy UNS N07718." In CORROSION 2016. NACE International, 2016. https://doi.org/10.5006/c2016-07459.

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Abstract Hydrogen embrittlement (HE) of nickel base alloy UNS N07718 was studied by tensile testing at low strain rate (10-4 s-1) under hydrogen charging. Hydrogen-assisted cracking mechanisms were studied via the joint use of Electron BackScatter Diffraction (EBSD) analysis and orientation-optimized Electron Channeling Contrast (ECC) imaging. Both intergranular and transgranular cracking were observed when hydrogen was introduced. Embrittlement occurred by strong hydrogen-deformation interactions and several mechanisms were found to contribute to hydrogen-assisted cracking in this alloy. Tran
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Grew, Kyle N., Abhijit S. Joshi, Aldo A. Peracchio, and Wilson K. S. Chiu. "Detailed Electrochemistry and Gas Transport in a SOFC Anode Using the Lattice Boltzmann Method." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-13621.

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A coupled electrochemical reaction and diffusion model has been developed and verified for investigation of mass transport processes in Solid Oxide Fuel Cell (SOFC) anode triple-phase boundary (TPB) regions. The coupled model utilizes a two-dimensional (2D), multi-species Lattice Boltzmann Method (LBM) to model the diffusion process. The electrochemical model is coupled through localized flux boundary conditions and is a function of applied activation overpotential and the localized hydrogen and water mole fractions. This model is designed so that the effects of the anode microstructure within
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Khan, Munir, Yexiang Xiao, Bengt Sunde´n, and Jinliang Yuan. "Analysis of Multiphase Transport Phenomena in PEMFCS by Incorporating Microscopic Model for Catalyst Layer Structures." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-65142.

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The catalyst layer (CL) in polymer electrolyte membrane (PEM) fuel cells is one of the key components regulating the overall performance of the cell. In PEM fuel cells, there are two CLs having identical composition for hydrogen oxidation (HO) and oxygen reduction (OR) reactions. There are four phases inside the CL, namely: carbon, Pt particles, ionomer and voids. In this work, a micro-model of the cathode CL has been developed mathematically using finite volume (FV) technique to investigate the transport phenomena of reactants and product species, ions and electrons by incorporating the above
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Wilhelm, Cole, Aliza Willsey, and Jeongmin Ahn. "Investigation of NOx Generation and Ammonia Fuel Utilization in a Solid Oxide Fuel Cell." In ASME 2024 Power Conference. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/power2024-138521.

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Abstract Decreasing the generation of CO2 from energy production is a key area in energy research and environmental sustainability. Fuel cells represent a solution to reducing CO2 generation through the use of hydrogen fuel to generate electricity. However, the widespread use of hydrogen fueled fuel cells is generally limited by difficulty of hydrogen storage, transportation, and synthesis. The primary issue with hydrogen storage is that gaseous hydrogen contains low volumetric energy density. One promising option to address these difficulties is the use of ammonia (NH3) in solid oxide fuel ce
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Zhang, Xiaohang, Frank Marken, and Christopher A. Paddon. "Screening Anti-Oxidant Activity at Oil Microdroplet Triple Phase Boundary Electrodes." In 9th International Conference on Engines and Vehicles. SAE International, 2009. http://dx.doi.org/10.4271/2009-24-0103.

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Chen, Qiuyang, Jian Zhang, Qiuwang Wang, and Min Zeng. "Effect of Bi-Layer Interconnector Design on the Current Density of Solid Oxide Fuel Cells." In ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2009. http://dx.doi.org/10.1115/fuelcell2009-85024.

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The concentration gradient of fuel and oxidant gas is great in the plane normal to the solid oxide fuel cells (SOFC) three-phase-boundary (TPB) layer, especially in the porous electrode. We present a novel interconnector design, termed bilayer interconnector, for SOFC. It can distribute the fuel and air gas in the plane normal to the SOFC TPB layer. In this paper, we develop a 3D model to study the current density of the SOFC with conventional and novel bi-layer interconnectors. The numerical results show that the novel SOFC design Rib1 can slightly enhance the mass transfer in the porous anod
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Garcke, Harald, Kazuo Ito, and Yoshihito Kohsaka. "Stability analysis of phase boundary motion by surface diffusion with triple junction." In Nonlocal and Abstract Parabolic Equations and their Applications. Institute of Mathematics Polish Academy of Sciences, 2009. http://dx.doi.org/10.4064/bc86-0-5.

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Deutsch, Todd, Yingying Chen, Ashlee Vise, Walter Klein, Guido Bender, and KC Neyerlin. "Electrocatalytic Reduction of Carbon Dioxide at a Triple Phase Boundary in Flow Reactors." In nanoGe Fall Meeting 2019. Fundació Scito, 2019. http://dx.doi.org/10.29363/nanoge.ngfm.2019.163.

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Deutsch, Todd, Yingying Chen, Ashlee Vise, Walter Klein, Guido Bender, and KC Neyerlin. "Electrocatalytic Reduction of Carbon Dioxide at a Triple Phase Boundary in Flow Reactors." In nanoGe Fall Meeting 2019. Fundació Scito, 2019. http://dx.doi.org/10.29363/nanoge.nfm.2019.163.

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Liu, Lin, Gap-Yong Kim, and Abhijit Chandra. "Deposition of Porous Anode Electrode of a Solid Oxide Fuel Cell by Ultrasonic Spray Pyrolysis." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33216.

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A modified spray pyrolysis approach has been utilized to fabricate anode electrode of a Solid Oxide Fuel Cell (SOFC). It was designed to control the anode microstructure to achieve large triple phase boundaries (TPBs) and high gas diffusion capability, which are critical in enhancing the performance of a SOFC. Deposition of porous anode film of Nickel and Ce0.9Gd0.1O1.95 on dense 8 mol.% yttria stabilized zirconia (YSZ) substrate was carried out using the modified spray pyrolysis. Effects of precursor solution feed rates, precursor solution concentrations and deposition temperatures on the TPB
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