Results 211 to 220 of about 18,192 (253)
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ACS Applied Materials & Interfaces, 2016
Silica impurity originated from the sealing or raw materials of the solid oxide cells (SOCs) accumulating at the Ni-YSZ triple phase boundaries (TPBs) is known as one major reason for electrode passivation. Here we report nanosilica precipitates inside Ni grains instead of blocking the TPBs when operating the SOCs at |i| ≥ 1.5 A cm(-2) for electrolysis
Jing Shao
exaly +3 more sources
Silica impurity originated from the sealing or raw materials of the solid oxide cells (SOCs) accumulating at the Ni-YSZ triple phase boundaries (TPBs) is known as one major reason for electrode passivation. Here we report nanosilica precipitates inside Ni grains instead of blocking the TPBs when operating the SOCs at |i| ≥ 1.5 A cm(-2) for electrolysis
Jing Shao
exaly +3 more sources
Triple Phase Boundaries in Solid-Oxide Cathodes
SIAM Journal on Applied Mathematics, 2009Component potential modeling based on solid-oxide electrochemistry is used to study a single-particle configuration where a hemispherical LSM particle sits on a YSZ electrolyte half-space. The primary comparison is between two pathways: one where oxide ions travel on the particle surface; the other where these ions travel through the bulk particle ...
Joseph D. Fehribach, Ryan O'Hayre
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Novel method for determining the triple phase boundary width
Solid State Ionics, 2016Abstract In order to improve the performance of solid oxide fuel cells (SOFCs), there is a need to deepen our understanding of the cathode reactions, which is rate-limiting. The purpose of this work is to develop and demonstrate a direct electrochemical technique for estimating the cathode triple-phase boundary (TPB) between electrode, electrolyte ...
Tzvia Beitner +3 more
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(Invited) Triple Phase Boundary Reaction in a Mixed-Conducting SOFC Cathode
ECS Meeting Abstracts, 2017Solid oxide fuel cells (SOFCs) attract attentions as high-efficiency energy-conversion devices. In order to establish high-performance SOFCs, the slow electrode kinetics, which is often a main cause of the energy loss, should be improved. In present SOFCs, mixed ionic-electronic conducting (MIEC) oxides, such as (La,Sr)CoO3 -δ
Koji Amezawa +10 more
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Direct Observation of Nanoscale Pt Electrode Agglomeration at the Triple Phase Boundary
ACS Applied Materials & Interfaces, 2015Nanoporous platinum electrode thin films were delaminated from yttria-stabilized zirconia (YSZ) substrates via double cantilever beam delamination to reveal the structure located at the interface between electrode and electrolyte. The thermally driven morphological evolution between the electrode top surface and the substrate contact interface of ...
Yu, CC Yu, Chen-Chiang +5 more
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Reaction Kinetics at the Triple-Phase Boundary in PEM Fuel Cells
Journal of Fuel Cell Science and Technology, 2008A mathematical model is developed to describe the reaction dynamics in the vicinity of the triple-phase boundary (TPB), which is an important part of the pore scale structure of the catalyst layer in proton exchange membrane fuel cells. The model incorporates coupled diffusion, migration, and reaction phenomena of the chemical components in an ...
P. Berg, A. Novruzi, O. Volkov
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Geometric Effects of Triple Phase Boundary in Fuel Cell Kinetics
ECS Meeting Abstracts, 2009Abstract not Available.
Young Beom Kim +3 more
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Triple-Phase Boundary and Surface Transport in Mixed Conducting Patterned Electrodes
Journal of The Electrochemical Society, 2008The mathematical framework required to account for a triple-phase boundary (TPB) and the accompanying surface transport was added to a two-dimensional numerical model of a mixed conducting thin film by considering appropriate kinetic rate and mass-transport expressions.
Matthew E. Lynch +3 more
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Geometric Effects of Triple Phase Boundary in Solid Oxide Fuel Cells
ECS Transactions, 2009This paper describes the fabrication and testing of a model electrode to study geometric effects at well-defined triple phase boundaries (TPB) in solid oxide fuel cells (SOFC), using silica particle masking and Langmuir-Blodgett deposition. Electrochemical behavior of dense platinum cathodes that were patterned into close-packed circular openings of ...
Young Beom Kim +3 more
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Cyclic Supersaturation and Triple Phase Boundary Dynamics in Germanium Nanowire Growth
The Journal of Physical Chemistry C, 2011Video-rate environmental transmission electron microscopy of Au-catalyzed chemical vapor deposition of Ge nanowires shows that growth kinetics are linked to an oscillatory behavior at the liquid−solid interface near the triple phase boundary (TPB), where the nanowire surface consists of an oblique facet.
A. D. Gamalski, C. Ducati, S. Hofmann
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