Article
Engineering, Electrical & Electronic
Azam Khan, Yi-Hung Wang, I-Ming Hung
Summary: This article presents the successful testing of a samarium-doped ceria mixed with barium carbonate (SDC/BC) electrolyte for low-temperature solid oxide fuel cells (LT-SOFCs). The study discusses the phase changes, particle size distribution, morphology, electrochemical impedance, and conductivity of the SDC/BC electrolyte. The results demonstrate the potential of SDC/BC as a low-temperature electrolyte for LT-SOFC.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Engineering, Environmental
Tian Gan, Hexuan Song, Xinqiang Fan, Ye Liu, Shouqing Liu, Yicheng Zhao, Yongdan Li
Summary: A Sn-doped Ce0.8Sm0.2O2_delta (SDC) supported Sn-Ni alloy anode was designed and prepared through a dual-modification strategy. The substitution of Sn improved the mobility of lattice oxygen in SDC, and Sn exsolves from the oxide phase to form intermetallic compounds with Ni after reduction. The composite anode showed unprecedented activity in the electrochemical oxidation of H2 and CH3OH, with high power densities achieved using these fuels. This work opens a new path for the design of high-performance SOFC anodes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
A. A. A. da Silva, M. C. Steil, F. N. Tabuti, R. C. Rabelo-Neto, F. B. Noronha, L. Mattos, F. C. Fonseca
Summary: Research showed that ceria dopant has a significant impact on the stability and catalytic activity of direct ethanol solid oxide fuel cells, demonstrating stability in ethanol steam reforming. The Ni/doped-ceria anodic catalytic layer can provide the steam needed for internal reforming, resulting in stable fuel cell operation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Yue Wang, Qing Shen, Yongcheng Tong, Zhongliang Zhan
Summary: Tailoring the surface chemistry of oxides is effective in adjusting their catalytic behavior. In this study, nickel-doped cerium oxide nanorods were synthesized and evaluated as anode catalysts for solid oxide fuel cells. The results show that the incorporation of nickel significantly enhances the catalytic activity, which is attributed to the presence of nanoparticles and increased surface active oxygen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Wenxuan Li, Xingxing Li, Chen Wang, Yansheng Gong, Rui Wang, Huanwen Wang, Jun Jin, Ling Zhao, Beibei He
Summary: Reasonable design of perovskite electrodes via surface engineering is an attractive strategy for advanced symmetrical solid oxide fuel cells (S-SOFCs) to achieve high activity and good durability. This study demonstrates that decorating PrBaMn0.5Fe1.5O5+delta perovskite with uniformly distributed iron doped CeO2 nanoparticles using atomic layer deposition (ALD) enhances both oxygen reduction and fuel oxidation kinetics, resulting in high electrochemical performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Electrochemistry
Jan Uecker, Ifeanyichukwu D. Unachukwu, Vaibhav Vibhu, Izaak C. Vinke, Ruediger-A. Eichel, L. G. J. (Bert) de Haart
Summary: One major challenge in enabling the market entry of solid oxide electrolysis cells (SOECs) technology is the poor degradation behavior caused by nickel agglomeration and migration in fuel electrodes. This study investigated the performance of single cells based on gadolinium doped ceria (GDC) fuel electrode and found lower degradation rates compared to previous Ni-GDC fuel electrode cells. The GDC fuel electrode did not significantly contribute to degradation, while the LSCF oxygen electrode had a major impact on the cells' degradation.
ELECTROCHIMICA ACTA
(2023)
Article
Nanoscience & Nanotechnology
Matthias Riegraf, Feng Han, Noriko Sata, Remi Costa
Summary: The study investigates the performance of different thicknesses of CGO layers manufactured by electron beam physical vapor deposition on solid oxide cells. Results show that a 0.15 μm thick layer leads to the formation of a continuous Sr-containing secondary phase at the CGO/YSZ interface, while 0.3 and 0.5 μm thick layers can maintain high performance and low degradation rates.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Matthias Riegraf, Ilaria Bombarda, Ferdinand Domling, Tom Liensdorf, Carolin Sitzmann, Nico Langhof, Stefan Schaffoener, Feng Han, Noriko Sata, Christian Geipel, Christian Walter, Remi Costa
Summary: Research shows that by adjusting the morphology and processing of the ceria interlayers, it is possible to significantly reduce residual stress in the cell and increase mechanical strength. This new approach holds promise for increasing the volumetric power density and material efficiency of solid oxide cell systems.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Davin Jeong, Yonghyun Lim, Hyeontaek Kim, Yongchan Park, Soonwook Hong
Summary: This study demonstrated the use of a silver and samarium-doped ceria (SDC) mixed ceramic and metal composite as a cathode for low-temperature solid oxide fuel cells (LT-SOFCs). The ratio between Ag and SDC, which can be adjusted by the co-sputtering process, was found to be crucial for catalytic reactions and enhanced triple phase boundary (TPB) density in the nanostructure. The Ag-SDC cermet cathode not only improved the performance of LT-SOFCs by decreasing polarization resistance, but also showed higher catalytic activity than platinum (Pt) due to the improved oxygen reduction reaction (ORR). It was discovered that even a small amount of Ag content was effective in increasing TPB density while preventing oxidation of the Ag surface.
Article
Chemistry, Multidisciplinary
Gwang Seon Park, Su In Mo, Jun Ho Kim, Jeong Woo Yun
Summary: 20 mol% samarium doped ceria (Ce0.8Sm0.2O2-delta, SDC) shows excellent ionic conductivity in solid oxide fuel cells (SOFCs), but requires high sintering temperatures. Adding Li2CO3 as a sintering aid can lower the sintering temperature and improve cell performance.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Ceramics
Kuk-Jin Hwang, Mi Jang, Min Kyu Kim, Seok Hee Lee, Tae Ho Shin
Summary: Solid oxide fuel cells (SOFCs) are gaining attention in the energy sector, yet the choice of electrolyte is crucial. LaGaO3-based electrolyte faces compatibility issues with Ni-based anodes, but introducing an interlayer can enhance efficiency. By optimizing the thickness of La-doped CeO2 interlayer, superior power performance is achieved, offering new possibilities for commercial applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Hyong June Kim, Min Jong Kil, Jemin Lee, Byung Chan Yang, Dohyun Go, Yonghyun Lim, Young-Beom Kim, Jihwan An
Summary: The study introduces a gradient cermet anode for DM-SOFCs operated at 450 degrees C using co-sputtering method, which shows higher voltage and power density, better thermal stability, and improved coking resistance compared to homogeneous anode. The combination of high triple phase boundary density and percolating ceria network in the gradient cermet anode contributes to these enhancements in cell performance.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Ceramics
Hojae Lee, Junghum Park, Yonghyun Lim, Young-Beom Kim
Summary: The study develops a method for fabricating a dense gadolinia-doped ceria (GDC) functional layer using a sacrificial bismuth oxide, Bi2O3, sintering aid layer above the GDC layer, even under constrained sintering conditions. This approach improves the solid oxide fuel cell performance significantly.
CERAMICS INTERNATIONAL
(2022)
Article
Electrochemistry
Huayang Zhu, Akhil Ashar, Robert J. Kee, Robert J. Braun, Gregory S. Jackson
Summary: This paper presents a physics-based model for predicting the performance of solid-oxide fuel cells with Ce0.9Gd0.1O2-delta electrolyte membranes. The model considers the thermodynamic and transport properties of GDC10 mobile charged defects and the influence of mixed ionic-electronic conductivity on the performance of the fuel cell. The results show that the competing charge transfer reactions and mixed conductivity affect the cell's open circuit voltages.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Electrochemistry
Yingjie Zhou, Feifan Wei, Haihua Wu
Summary: Electrocatalytic CO2 reduction in solid oxide electrolysis cells can be enhanced by decorating Fe on Sm-doped CeO2, which increases the catalytic active sites and oxygen vacancy concentrations, facilitating CO2 adsorption and dissociation.
ELECTROCHIMICA ACTA
(2022)
Article
Engineering, Chemical
Hasan Ozdemir, M. A. Faruk Oksuzomer, M. Ali Gurkaynak
CHEMICAL ENGINEERING COMMUNICATIONS
(2019)
Article
Chemistry, Multidisciplinary
Aydin Tavman, Mayram Hacioglu, Demet Gurbuz, Adem Cinarli, M. A. Faruk Oksuzomer, A. Seher Birteksoz Tan
BULLETIN OF THE CHEMICAL SOCIETY OF ETHIOPIA
(2019)
Article
Engineering, Multidisciplinary
Hasan Ozdemir, M. A. Faruk Oksuzomer, Mehmet Ali Gurkaynak
JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY
(2020)
Article
Engineering, Chemical
Hasan Ozdemir, M. A. Faruk Oksuzomer
Article
Polymer Science
Fatma Ebru Koc, Tuba Gurkaynak Altincekic
Summary: The study showed that genipin concentration significantly affects the swelling behavior of genipin-cross-linked gelatin/chitosan films, and pH has a notable influence on the release of methylene blue. The results indicated a cross-linking ratio of up to 65% when using 1.5% genipin, with significantly lower release rate at pH 8.0 compared to pH 1.5.
Article
Chemistry, Inorganic & Nuclear
Aliye Arabaci, M. A. Faruk Oksuzomer
Summary: The study aimed to prepare Er and Sm co-doped CeO(2) electrolytes via the Pechini method and investigate their effects on the structural and electrical properties of CeO2. The results showed that the highest ionic conductivity was observed for the singly doped Ce0.80Sm0.20O1.90 electrolyte, while different doping combinations resulted in varying conductivity levels.
INORGANIC AND NANO-METAL CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Dilara Guctas, Vedat Sariboga, M. A. Faruk Oksuzomer
Summary: A novel chitosan templating method was used to prepare Sm0.2Ce0.8O1.9 electrolytes, and the sintering kinetics, phase structure, and morphological structure of the materials were investigated. The dominant diffusion mechanism and grain growth activation energies during sintering were calculated for the first time. The study confirmed that the chitosan templating method is an effective way of synthesizing SDC20 materials.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2021)
Article
Engineering, Chemical
Hasan Ozdemir, Ecem Ciftcioglu, M. A. Faruk Oksuzomer
Summary: La2O3 and La2O2CO3 catalysts with different morphologies were synthesized and tested for the oxidative coupling of methane. La2O3 catalysts were sensitive and La2O2CO3 catalysts were stable under atmospheric conditions. The surface oxygen type, surface area, and basicity were found to be important factors influencing the activity and selectivity of the catalysts.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Goknur Donmez, Tuba Guerkaynak Altincekic, Vedat Sariboga, Mehmet Ali Faruk Oksuzomer
Summary: Ce1 - xYxO2 - x/2 (YDC) powders were successfully prepared via polyol method, and all the prepared YDC powders exhibited a single-phase fluorite structure after calcination at 500 degrees C. The nominal dopant concentrations of YDC samples were in good agreement with the values obtained by EDS. The crystallite sizes varied depending on the dopant concentration, and the lattice parameters of YDC samples followed Vegard's law. YDC pellets with high relative densities were obtained by sintering at 1400 degrees C for 6 hours. The ionic conductivities of YDC pellets significantly increased until x = 0.15, reaching 2.23 x 10(-2) S cm(-1) for YDC15 at 800 degrees C. YDC20 showed a small increase of 12% in ionic conductivity at the same measurement temperature, reaching 2.5 x 10(-2) S cm(-1).
Article
Materials Science, Ceramics
Emine Elif Ocakci, Vedat Sariboga, Hasan Ozdemir, Tuba Gurkaynak Altincekic, M. A. Faruk Oksuzomer
Summary: This research aimed to synthesize and characterize rare earth metal-free cerium-based electrolytes for solid oxide fuel cells (SOFCs) by doping calcium, strontium, or magnesium to CeO2. Various samples were prepared and characterized for their solubility limits, microstructural and physical properties, which revealed that Ca or Sr doped electrolytes showed good ionic conductivity close to state-of-the-art Sm doped Ceria electrolytes, while Mg doping was ineffective.
JOURNAL OF ELECTROCERAMICS
(2023)
Article
Biophysics
Demet Erdaga, Serkan N. Koc, M. Faruk Oksuzomer, Leman Yalcintepe
Summary: This study aimed to investigate the synergistic effect of GP and selenium on 3T3 cells, with results showing that selenium can promote cell growth and proliferation on PVA/GE scaffolds.
ACTA OF BIOENGINEERING AND BIOMECHANICS
(2021)
Article
Chemistry, Multidisciplinary
Burcu Aygun, Mehmet Ali Faruk Oksuzomer, Vedat Sariboga
Summary: This study focuses on the effect of different combustion agents on the properties of 20% mole-Sm doped ceria ceramics as a solid electrolyte for solid oxide fuel cells. Triethylene glycol synthesized SDC20 electrolyte shows the highest total ionic conductivity among all the synthesized electrolytes.
TURKISH JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Ezgi Bayrakdar Ates, Tuba Gurkaynak Altinckekic, Mehmet Ali Faruk Oksuzomer
Summary: Nickel catalysts supported on gamma-Al2O3 were synthesized in the presence of polyvinylpyrrolidone (PVP) using both alkaline polyol method and hydrazine reduction method. The effects of different molar ratios on the structural properties of the catalysts were characterized, and the optimum conditions were found to demonstrate the highest catalytic activity and selectivity.
TURKISH JOURNAL OF CHEMISTRY
(2021)
