@article{Vilela2023,

title = {La0.5Ce0.5O1.75-Catalytic Layer for Methane Conversion into C2 Products Using Solid Oxide Fuel Cell},

author = {Vanessa Bezerra Vilela and Vivian Vazquez Thyssen and Franck Fournet Fayard and Laurance Massim and Daniel Zanetti de Florio and Andre Santarosa Ferlauto and Marlu Cesar Steil and Fabio Coral Fonseca},

url = {https://iopscience.iop.org/article/10.1149/11106.1957ecst/meta},

doi = {10.1149/11106.1957ecst},

issn = {1938-6737},

year  = {2023},

date = {2023-05-19},

urldate = {2023-05-19},

journal = {ECS Trans.},

volume = {111},

number = {6},

pages = {1957--1964},

publisher = {The Electrochemical Society},

abstract = {Methane (CH4), the major constituent of natural gas and biogas, is an abundant source to obtain value-added hydrocarbons. The oxidative coupling of methane (OCM) is a direct catalytic route to convert CH4 towards C2 hydrocarbons, ethane (C2H6) and ethylene (C2H4). Using a solid oxide fuel cell (SOFC) is a strategy to overcome some challenges of fixed-bed catalytic reactors. In this context, we have studied the La0.5Ce0.5O1.75 (LCO) oxide as a catalytic layer in a SOFC for methane conversion to C2. The activity test was carried out at different O2-/CH4 ratios, varying the anode gas composition, and applied currents.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Trindade2022,

title = {Tuning of Shape, Defects, and Disorder in Lanthanum-Doped Ceria Nanoparticles: Implications for High-Temperature Catalysis},

author = {Fabiane J. Trindade and Sergio Damasceno and Larissa Otubo and Marissol R. Felez and Daniel Zanetti de Florio and Fabio C. Fonseca and Andre S. Ferlauto},

url = {https://pubs.acs.org/doi/abs/10.1021/acsanm.2c00942},

doi = {10.1021/acsanm.2c00942},

issn = {2574-0970},

year  = {2022},

date = {2022-07-22},

urldate = {2022-07-22},

journal = {ACS Appl. Nano Mater.},

volume = {5},

number = {7},

pages = {8859--8867},

publisher = {American Chemical Society (ACS)},

abstract = {The design of nanomaterials by tailoring the size, shape, and surface chemistry has a significant impact on their properties. The fine-tuning of structural defects of ceria rod-like and cube-like-shaped nanoparticles was performed via La3+ doping in molar ratios of 0–70 mol %. Morphology control was achieved by varying the hydrothermal synthesis temperature. For LaxCe1–xO2–x/2 samples prepared at 110 °C, nanorod-like structures are obtained for x < 0.30 and a random morphology of interconnecting polyhedra is achieved for a larger x. The ceria fluorite crystalline structure is maintained at an x of up to 0.60, and both Raman and X-ray diffraction results indicate a high level of defects and disorder in the crystalline structure. For LaxCe1–xO2–x/2 samples prepared at 180 °C, cube-shaped particles are predominant for an x of up to 0.10; however, for x> 0.20, two fluorite phases with different lattice parameters are associated with two distinct shapes, cubes and rods The La concentration in nanocubes is limited to x = 0.10 even for samples prepared with higher nominal La concentrations, whereas the nanorods contain larger La concentrations. The demonstrated morphology and defect control on La-doped ceria nanoparticles are critical for applications such as high-temperature oxide catalysts.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Damasceno2022b,

title = {Oxidative coupling of methane in chemical looping design},

author = {Sergio Damasceno and Fabiane J. Trindade and Fabio C. Fonseca and Daniel Zanetti de Florio and Andre S. Ferlauto},

url = {https://www.sciencedirect.com/science/article/abs/pii/S0378382022000959?via%3Dihub},

doi = {10.1016/j.fuproc.2022.107255},

issn = {0378-3820},

year  = {2022},

date = {2022-06-00},

urldate = {2022-06-00},

journal = {Fuel Processing Technology},

volume = {231},

publisher = {Elsevier BV},

abstract = {The search for alternative non‑carbon-emitting uses of the huge reserves of natural gas has renewed the interest on direct conversion of methane to value added chemicals. Oxidative coupling of methane (OCM) is a key potential route to convert methane directly to ethylene and innumerous works have focused on the study and development of catalysis for such reaction. Despite these efforts, the limited yield and selectivity achieved still hinders the industrial deployment of such reactions. In this work, we provide a mini-review on studies that focus on OCM process based on the chemical looping (CL) concept, in which methane and oxygen are fed in two separated cyclic steps and a metal oxide catalyst is used as the oxygen source to activate the methane molecule. CL emerges as a promising design for viable methane conversion by improving selectivity due to the use lattice oxygen species for methane activation, avoiding undesired combustion gas phase reactions triggered by molecular oxygen. We review all classes of catalyst tested in this approach, including single oxides, doped and co-doped systems based on Mg-single bondMn oxides, rare earths, Mn-Na2WO4, and perovskites, and most recent optimization of reactor operation conditions.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Muccillo2021,

title = {Electric field‐assisted sintering anode‐supported single solid oxide fuel cell},

author = {Reginaldo Muccillo and Daniel Zanetti de Florio and Fabio C. Fonseca and Sabrina G. M. Carvalho and Eliana N. S. Muccillo},

url = {https://ceramics.onlinelibrary.wiley.com/doi/abs/10.1111/ijac.13871},

doi = {10.1111/ijac.13871},

issn = {1744-7402},

year  = {2022},

date = {2022-03-00},

urldate = {2022-03-00},

journal = {Int J Applied Ceramic Tech},

volume = {19},

number = {2},

pages = {906--912},

publisher = {Wiley},

abstract = {Cosintering (La0.84Sr0.16MnO3 thin-film cathode/ZrO2: 8 mol% Y2O3 thin-film solid electrolyte/55 vol.% ZrO2:8 mol% Y2O3 + 45 vol.% NiO anode, ϕ = 12 × 1.5 mm thick pellet) was achieved by applying an electric field for 5 min at 1200°C. Impedance spectroscopy measurements of the anode-supported three-layer cell show an improvement of the electrical conductivity in comparison to that of a conventionally sintered cell. The scanning electron microscopy images of the cross-sections of electric field-assisted pressureless sintered cells show a fairly dense electrolyte and porous anode and cathode. Joule heating, resulting from the electric current due to the application of the AC electric field, is suggested as responsible for sintering. Dilatometric shrinkage curves, electric voltage and current profiles, impedance spectroscopy diagrams, and scanning electron microscopy micrographs show how anode-electrolyte-cathode ceramic cells can be cosintered at temperatures lower than the usually required.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Han2022,

title = {Enhanced electromechanical properties in low-temperature gadolinium-doped ceria composites with low-dimensional carbon allotropes},

author = {Jin Kyu Han and Ahsanul Kabir and Victor Buratto Tinti and Simone Santucci and Da Som Song and So Young Kim and Wooseok Song and Eunyoung Kim and Sang Don Bu and Frank Kern and Daniel Zanetti de Florio and Vincenzo Esposito},

url = {https://pubs.rsc.org/en/content/articlelanding/2022/ta/d1ta10854a/unauth},

doi = {10.1039/d1ta10854a},

issn = {2050-7496},

year  = {2022},

date = {2022-02-22},

urldate = {2022-02-22},

journal = {J. Mater. Chem. A},

volume = {10},

number = {8},

pages = {4024--4031},

publisher = {Royal Society of Chemistry (RSC)},

abstract = {We couple the spark plasma sintering (SPS) technique with the ball mill process to fabricate a new electro-chemo-mechanical functional carbon–metal oxide hybrid material. Graphene oxide (GO) or carbon nanotubes (CNT) carbon allotropes are mechanically mixed with gadolinium-doped ceria (CGO). SPS allows consolidating dense carbon–metal oxide hybrids with uniform morphology and high crystallinity. The carbon allotropes and SPS lead to highly reduced CGO. The metal oxide presents a chemically tuned grain boundary with highly oxygen defect concentration at the near-grain boundary region. The hybrid interface can hinder chemical oxidation at high-temperature depending on the carbon allotropy. As a result, the hybrid materials with CNT display high ionic conductivity and activation energy, reducing the space charge layer and charge distribution. This feature enhances the electromechanical properties at room temperature. We especially disclose electrostriction in the CNT-based hybrids superior to the pure CGO and follow a non-Newnham relation. Notably, integrating carbon materials with metal oxides using the SPS can generally be applied to synthesising a range of functional metal oxide composite.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Thyssen2021b,

title = {Direct Conversion of Methane to C2 Hydrocarbons in Solid-State Membrane Reactors at High Temperatures},

author = {Vivian Vazquez Thyssen and Vanessa Bezerra Vilela and Daniel Zanetti de Florio and Andre Santarosa Ferlauto and Fabio Coral Fonseca},

url = {https://pubs.acs.org/doi/abs/10.1021/acs.chemrev.1c00447},

doi = {10.1021/acs.chemrev.1c00447},

issn = {1520-6890},

year  = {2022},

date = {2022-02-09},

urldate = {2022-02-09},

journal = {Chem. Rev.},

volume = {122},

number = {3},

pages = {3966--3995},

publisher = {American Chemical Society (ACS)},

abstract = {Direct conversion of methane to C2 compounds by oxidative and nonoxidative coupling reactions has been intensively studied in the past four decades; however, because these reactions have intrinsic severe thermodynamic constraints, they have not become viable industrially. Recently, with the increasing availability of inexpensive “green electrons” coming from renewable sources, electrochemical technologies are gaining momentum for reactions that have been challenging for more conventional catalysis. Using solid-state membranes to control the reacting species and separate products in a single step is a crucial advantage. Devices using ionic or mixed ionic–electronic conductors can be explored for methane coupling reactions with great potential to increase selectivity. Although these technologies are still in the early scaling stages, they offer a sustainable path for the utilization of methane and benefit from the advances in both solid oxide fuel cells and electrolyzers. This review identifies promising developments for solid-state methane conversion reactors by assessing multifunctional layers with microstructural control; combining solid electrolytes (proton and oxygen ion conductors) with active and selective electrodes/catalysts; applying more efficient reactor designs; understanding the reaction/degradation mechanisms; defining standards for performance evaluation; and carrying techno-economic analysis.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Theodoro2022,

title = {ELECTROCHEMICAL INVESTIGATION OF ELECTROGALVANIZED STEEL PANELS EXPOSED TO AN ACCELERATED CORROSION ENVIRONMENT},

author = {Giovanna L. Theodoro and M. A. Colosio and Daniel Zanetti de Florio},

url = {https://www.sae.org/publications/technical-papers/content/2021-36-0111/},

doi = {10.4271/2021-36-0111},

year  = {2022},

date = {2022-02-04},

urldate = {2022-02-04},

publisher = {SAE International},

abstract = {Corrosion resistance is an important property requirement for materials applications in the manufacturing of automobiles. Zinc is widely used as coating of carbon steels, due to its anticorrosive properties. The most relevant application of zinc is zinc-galvanizing to protect steel from rusting acting as sacrificial anode. In the present study, the corrosion behavior of electrogalvanized steel panels by different thickness of zinc were studied under cyclic corrosion testing (CCT) and vehicle test. The CCT tests exposed the samples in a series of different environments in a repetitive cycle, these exposures consist of cycling between salt fog, dry and wet conditions. For the vehicle test, the steel panels were attached to the car exterior then exposed to corrosion and durability inputs with a variety of road surfaces for automotive testing and validation. Vehicle test is a large-scale laboratory test and is performed in facilities well designed by the automakers with the purpose of test complete vehicles and qualify them for real world application. The corrosion rate was investigated by electrochemical measurements such as open circuit voltage and potential dynamic polarization curves using the Tafel extrapolation method. The results suggests that the cyclic corrosion test has a more controlled corrosion environment, and the corrosion resistance is mainly related to the zinc thickness of the samples. The corrosion rate of the panels exposed to the vehicle test demonstrated that the position where the panels were attached to the car is the key factor to investigate their corrosion resistance.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{deSouza2022,

title = {Partial Methane Oxidation in Fuel Cell-Type Reactors for Co-Generation of Energy and Chemicals: A Short Review},

author = {Rodrigo F. B. de Souza and Daniel Zanetti de Florio and Ermete Antolini and Almir O. Neto},

url = {https://www.mdpi.com/2073-4344/12/2/217},

doi = {10.3390/catal12020217},

issn = {2073-4344},

year  = {2022},

date = {2022-02-00},

urldate = {2022-02-00},

journal = {Catalysts},

volume = {12},

number = {2},

publisher = {MDPI AG},

abstract = {The conversion of methane into chemicals is of interest to achieve a decarbonized future. Fuel cells are electrochemical devices commonly used to obtain electrical energy but can be utilized either for chemicals’ production or both energy and chemicals cogeneration. In this work, the partial oxidation of methane in fuel cells for electricity generation and valuable chemicals production at the same time is reviewed. For this purpose, we compile different types of methane-fed fuel cells, both low- and high-temperature fuel cells. Despite the fact that few studies have been conducted on this subject, promising results are driving the development of fuel cells that use methane as a fuel source for the cogeneration of power and valuable chemicals.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Palhares2021b,

title = {Oxygen vacancy engineering of TaOx-based resistive memories by Zr doping for improved variability and synaptic behavior},

author = {João H Quintino Palhares and Yann Beilliard and Fabien Alibart and Everton Bonturim and Daniel Zanetti de Florio and Fabio C Fonseca and Dominique Drouin and Andre S Ferlauto},

url = {https://iopscience.iop.org/article/10.1088/1361-6528/ac0e67/meta},

doi = {10.1088/1361-6528/ac0e67},

issn = {1361-6528},

year  = {2021},

date = {2021-10-01},

urldate = {2021-10-01},

journal = {Nanotechnology},

volume = {32},

number = {40},

publisher = {IOP Publishing},

abstract = {Resistive switching (RS) devices are promising forms of non-volatile memory. However, one of the biggest challenges for RS memory applications is the device-to-device (D2D) variability, which is related to the intrinsic stochastic formation and configuration of oxygen vacancy (VO) conductive filaments (CFs). In order to reduce the D2D variability, control over the formation and configuration of oxygen vacancies is paramount. In this study, we report on the Zr doping of TaOx-based RS devices prepared by pulsed-laser deposition as an efficient means of reducing the VO formation energy and increasing the confinement of CFs, thus reducing D2D variability. Our findings were supported by XPS, spectroscopic ellipsometry and electronic transport analysis. Zr-doped films showed increased VO concentration and more localized VOs, due to the interaction with Zr. DC and pulse mode electrical characterization showed that the D2D variability was decreased by a factor of seven, the resistance window was doubled, and a more gradual and monotonic long-term potentiation/depression in pulse switching was achieved in forming-free Zr:TaOx devices, thus displaying promising performance for artificial synapse applications.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Tinti2021,

title = {Low-temperature synthesis of bismuth titanate by modified citrate amorphous method},

author = {V.B. Tinti and D. Marani and A. Kabir and A.B. Haugen and V. Esposito and Daniel Zanetti de Florio},

doi = {10.1016/j.ceramint.2021.01.058},

issn = {0272-8842},

year  = {2021},

date = {2021-05-00},

urldate = {2021-05-00},

journal = {Ceramics International},

volume = {47},

number = {9},

pages = {12130--12136},

publisher = {Elsevier BV},

abstract = {Bismuth titanate is a lead-free piezoelectric ceramic with outstanding properties that strictly depend on the composition and microstructure. However, bismuth-based materials are difficult to synthesize due to bismuth volatilisation that causes secondary phases and stoichiometry deviations. In this work, we propose a low-temperature chemical route, i.e. a modified amorphous citrate method, that allows a reduction of thermal treatment temperature, when compared with solid-state or other chemical routes, to obtain single-phase bismuth titanate samples. Single-phase powders with particle size under 300 nm are produced by calcination at 700 °C, and prepared into homogeneous dense pellets (density above 95%), with only isolated pores. The pellets show two distinctive features in the electrical behaviours directly associated with their mica-like microstructure: planar oriented boundaries are responsible for oxygen conduction, while the bulk is dominated by electronic conductivity. The samples show a high dielectric constant, around 200 at room temperature, while maintaining a low loss factor. The pellets also achieved a maximum polarisation of 5.85 μC/cm2 and an inverse piezoelectric coefficient of 7.4 pm/V. The dielectric and piezoelectric properties obtained are comparable or superior to the state-of-the-art.



},

keywords = {},

pubstate = {published},

tppubtype = {article}

}