Bio-inspired surfactant assisted nano-catalyst impregnation of Solid-Oxide Fuel Cell (SOFC) electrodes

Ozmen, Ozcan; Zondlo, John W.; Lee, Shiwoo; Gerdes, Kirk; Sabolsky, Edward M.

doi:10.1016/j.matlet.2015.10.159

Cited by 7 publications

(7 citation statements)

References 24 publications

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“…Similar to standard polydopamine composites, catalytic metallic nanoparticles have been used in conjunction with carbonized polydopamine for the reductive degradation of organic molecules . Carbonized polydopamine coatings have also been used in the photocatalytic splitting of water; to support the oxidation of carbon monoxide and hydrogen and in electrocatalysts in both oxygen reduction and oxygen evolution reactions for rechargeable metal–air batteries and regenerative fuel cells …”

Section: Applications Of Catecholamine Polymersmentioning

confidence: 99%

Versatile Surface Modification Using Polydopamine and Related Polycatecholamines: Chemistry, Structure, and Applications

Barclay

Hegab

Clarke

et al. 2017

Adv Materials Inter

301

223

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Almost ten years ago, Lee et al. [13] formulated a universal adhesive coating based on observation of the strong attachment by mussels through their byssal threads to virtually all types of inorganic and organic surfaces. The amino acid compositions of the mussel foot proteins that generate the attachment are rich in catechol and amine groups. [13][14][15] These groups associate under marine conditions, forming strong covalent and noncovalent interactions with substrates. [13] This led to the idea that both catechol and amine groups were crucial in forming robust, wide spectrum adhesive nanolayers [16,17] and consequently dopamine was conceived as a powerful building block for spontaneous deposition of thin polymer films. The dopamine monomer is deposited onto unadulterated surfaces through self-assembly and oxidative cross-linking from mild pH aqueous solution in a rapid reaction. This results in a durable, nanoscale, conformal, and hydrophilic coating that can be readily modified to introduce specific surface chemistries for a particular application. [18][19][20][21][22] These bioinspired, polydopamine materials are chemically and structurally indistinguishable from eumelanins found in the human body, [23,24] providing excellent biocompatibility. Additionally, polydopamine has broad electromagnetic absorption and excellent photothermal energy conversion [25] as well as having ionic-electronic hybrid conductivity. [26] Along with the excellent coating performance, these properties provide a vast array of potential applications for polydopamine materials.In this article, we explain what is known about polydopamine and related catecholamine coatings; their formation, the adhesion mechanism, and their physicochemical properties and we also review the applications of these materials (Figure 1). Since 2011, there have been a number of reviews on this subject matter, including general reviews on the physicochemical properties of polydopamine coatings [11,20,[27][28][29] and their applications. [20,27,30] There are also a number of more specific reviews on the chemical synthesis and modulation of polycatecholamine coatings, [31] the biomedical applications of these coatings, [8,[32][33][34] their electronic properties, [26,35] the use of polydopamine to make films at fluid interfaces, [36] in hierarchically constructed particles, [33] and capsules, [30] exploitation of polycatecholamine coatings in membrane filtration, [37] polydopamine-derived carbon materials, [38] and the use of coordination chemistry in catechol-based materials. [39] Nonetheless, this area of research is growing so rapidly [25,27] that many recent Polydopamine and related polycatecholamines can be easily deposited onto almost any surface from mild, aqueous solution. This results in durable, nanoscale coatings that exhibit high biocompatibility and have useful chemical and electronic properties. Additionally, these materials can be readily chemically and physically modified, and consequently, they are used extensively for surface modification. This ...

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Section: Applications Of Catecholamine Polymersmentioning

confidence: 99%

Versatile Surface Modification Using Polydopamine and Related Polycatecholamines: Chemistry, Structure, and Applications

Barclay

Hegab

Clarke

et al. 2017

Adv Materials Inter

301

223

View full text Add to dashboard Cite

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“…[8][9][10][11] Nanomaterials and related nanotechnology, as one of the thin film forming technologies, have received more and more attention because they can improve battery performance by reducing the polarization resistance of the battery and generating new functions, thus significantly developing the current SOFC technology. [12][13][14][15] The breakthroughs in the preparation methods and technologies of nanomaterials have brought more unique synergistic properties of nanomaterials, such as high stability, excellent electrical conductivity, large specific surface area, easy handling, excellent electrical and photochemical properties. Therefore, it has aroused great interest in scientific research and potential applications, especially widely used in energy conversion, storage, catalysis, and other energy sources.…”

Section: Introductionmentioning

confidence: 99%

Preparation of PSFO and LPSFO nanofibers by electrospinning and their electronic transport and magnetic properties

Su¹,

Zhu²,

Zhang³

et al. 2022

Chinese Phys. B

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In this paper, Pr0.5Sr0.5FeO3 (PSFO) and La0.25Pr0.25Sr0.5FeO3 (LPSFO) nanofibers were prepared by electrospinning and subsequent calcination, and their morphology, microstructure, electronic transport and magnetic properties were studied systematically. The temperature-dependent resistance curves of PSFO and LPSFO nanofibers were measured in the temperature range from 300 K down to 10 K. With the temperature lowering, the resistance increased gradually and the then decreased sharply due to the occurrence of ferromagnetic metal phase. The metal-insulator transition temperature was about 110 K and 180 K for PSFO and LPSFO nanofibers separately. The electronic conduction behavior above the transition temperature can be described by one-dimensional Mott’s variable-range hopping (VRH) model. The hysteresis loops and the field-cooled (FC) and zero-field-cooled (ZFC) curves showed that both PSFO and LPSFO nanofibers exhibit ferromagnetism. Although the doping of La reduces the overall magnetization intensity of the material, it increases the ferromagnetic ratio of the system, which may improve the performance of LPSFO in solid oxide fuel cell.

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“…Moreover, pore-clogging and gas starvation issues may be other Progressively increasing the catalyst loading with repetitive steps can improve electronic conductivity, but it requires tedious infiltration/drying/ calcination steps and could potentially reduce the original porosity of the porous scaffold, causing gas transport limitations [28] and hence increasing the polarization resistance [45]. There have been only limited efforts devoted to developing a protocol for one or two infiltration steps with high nitrate concentration in the presence of dispersant or surfactant [38,74,78,156,173].…”

Section: Infiltrated Materials Phasementioning

confidence: 99%

“…Dip coating is a well-known method for the coating of planar substrates. Also, it has been used to modify or infiltrate 3-D scaffolds such as SOFC electrodes [52,58,60,61,74,78,80,84,96,99,103,105,113,125]. A schematic representation of the dip-coating method is shown in…”

Section: Dip Coatingmentioning

confidence: 99%

“…Scanning electron microscope pictures of (a) surface and (b) fractured crosssection of pure Ni anode, (c) surface and (d) fractured cross-section of 2.7 mg/cm 2 Y2O3stabilized ZrO2-impregnated Ni anode, (e) surface and (f) fractured cross-section of 1.7 mg/cm 2 Gd-doped CeO2-impregnated Ni anode [54].Finally, the precursor drying parameters have a significant influence on the particle localization. Dissolved metal nitrate or particles localized unevenly and drifted through due to the phenomenon called 3-D segregation, in which ions can precipitate onto the previously calcined catalyst surface[31,78,80,[169][170][171][172]. The study by Zhu et al showed that drying method of the infiltrated cell facilitated the morphology of the gel in flower-like which facilitated the infiltration process[108].…”

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confidence: 99%

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Investigation of Nano-ceria Catalyst Infiltration of Solid Oxide Fuel Cell (SOFC) Electrodes Using Bio-Inspired Catechol Surfactants

Ozmen¹

Self Cite

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Investigation of Nano-ceria Catalyst Infiltration of Solid Oxide Fuel Cell (SOFC) Electrodes Using Bio-Inspired Catechol Surfactants Ozcan Ozmen Development of solid oxide fuel cell (SOFC) electrodes with nano-structured grains can show enhanced power density with high catalytic activity owing to the higher surface area to volume ratio of the particles. However, the addition of nano-particles during the conventional electrode manufacturing process causes inevitable structural changes due to the coarsening of nano-particles at sintering temperatures. Wet impregnation/ infiltration methods are a practical and well-utilized method to form nanoparticles within the porous electrode microstructure of solid oxide fuel cells (SOFC) which requires relatively low calcination temperatures. Critical factors that impact the reduction of the electrode polarization using the nano-catalyst impregnation strategy include catalyst loading, decoration type, and volumetric distribution homogeneity through the porous electrode microstructure. These can mostly be tuned by performing repetitive infiltration cycles followed by a co-firing step after each cycle for calcination. This labor and timeintensive method continues until the desired nano-catalyst loading is achieved. The factors that may degrade the performance as inter-particle interactions, pore-clogging, and/or inhomogeneous deposition result in gas diffusion related to rapid cell voltage degradation issues. The objective of this work is to investigate organic electrode modifiers to enhance nanocatalyst infiltration efficiency and uniformity within a commercial nickel oxide (NiO)/ yttria stabilized zirconia (YSZ) anode support and lanthanum strontium manganite (LSM)/YSZ cathode systems. The aim is to reduce the process to minimal processing steps while increasing both the performance and stability of the SOFC by decorating the nano-catalyst deposition. In this study, nano-CeO2, ceria, was used as a redox catalyst system and efficiently inserted throughout both porous SOFCs electrodes simultaneously by using a bio-inspired surfactant-assisted infiltration protocol. The process includes the initial modification of the electrode pore walls with a catecholbased surfactant film, i.e., poly-dopamine (pDA), poly epinephrine (pNE) or other alternative surfactants from the catechol family. The nano-ceria layer is then deposited uniformly over the bio-template surfactant layer during a single submersion of the SOFC into a cerium salt solution. Voltage-current-power curves and impedance spectroscopy were used to characterize the electrochemical performance of the impregnated anode-supported SOFC button cells. The endgoal of the work was to develop an infiltration protocol that performs boosted initial power density (performance) with high-stability by mitigating the nano-catalyst coarsening. The infiltrated cells displayed up to 35% reduction in polarization over the baseline cell with high electrochemical stability during 300 hours of testing at 750 o C. The catechol surfactant depositio...

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Bio-inspired surfactant assisted nano-catalyst impregnation of Solid-Oxide Fuel Cell (SOFC) electrodes

Cited by 7 publications

References 24 publications

Versatile Surface Modification Using Polydopamine and Related Polycatecholamines: Chemistry, Structure, and Applications

Versatile Surface Modification Using Polydopamine and Related Polycatecholamines: Chemistry, Structure, and Applications

Preparation of PSFO and LPSFO nanofibers by electrospinning and their electronic transport and magnetic properties

Investigation of Nano-ceria Catalyst Infiltration of Solid Oxide Fuel Cell (SOFC) Electrodes Using Bio-Inspired Catechol Surfactants

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