Person: Prado Gonjal, Jesús De La Paz
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First Name
Jesús De La Paz
Last Name
Prado Gonjal
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Químicas
Department
Química Inorgánica
Area
Química Inorgánica
Identifiers
7 results
Search Results
Now showing 1 - 7 of 7
- Project number: PIMCD95/23-24
Item Modelos bidimensionales y tridimensionales para la enseñanza de la Cristalografía y la Mineralogía(2024) Pina Martínez, Carlos Manuel; Ávila Brande, David; Cabeza Llorca, Ana; Cascos Jiménez, Vanessa Amelia; Crespo López, Ángel; Fernández Sequeira, Vinicio; González Illanes, Tamara; López-Acevedo Cornejo, María Victoria; Pallarés Zazo, Ana; Prado Gonjal, Jesús De La Paz; Solana Madruga, Elena; Pimentel Guerra, Carlos; Pina Martínez, Carlos Manuel Item From theory to experiment: BaFe0.125Co0.125Zr0.75O3−δ, a highly promising cathode for intermediate temperature SOFCs(Journal of Materials Chemistry A, 2020) Sánchez Ahijón, Elena; Marín Gamero, Rafael; Molero-Sánchez, Beatriz; Ávila Brande, David; Manjón-Sanz, Alicia; Fernández-Díaz, M. Teresa; Morán Miguélez, Emilio; Schmidt, Rainer; Prado Gonjal, Jesús De La PazIn a recent theoretical study [Jacobs et al., Adv. Energy Mater., 2018, 8, 1702708], BaFe0.125Co0.125Zr0.75O3−δ was predicted to be a stable phase with outstanding performance as an auspicious cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). It is shown here that the theoretical predictions are valid. The material can be synthesized by the citrate method as a single cubic Pm[3 with combining macron]m phase with a significant amount of oxygen vacancies, randomly distributed in the anionic sublattice facilitating oxygen vacancy conduction. A thermal expansion coefficient of 8.1 × 10−6 K−1 suggests acceptable compatibility with common electrolytes. Electrochemical impedance spectroscopy of symmetrical cells gives an area-specific resistance of 0.33 Ω cm2 at 700 °C and 0.13 Ω cm2 at 800 °C. These values are reduced to 0.13 Ω cm2 at 700 °C and 0.05 Ω cm2 at 800 °C when the material is mixed with 30 wt% Ce0.9Gd0.1O2−δ.Item Microwave-assisted synthesis of thermoelectric oxides and chalcogenides(Ceramics International, 2022) González-Barrios, Marta María; Tabuyo Martínez, Marina; Cascos Jiménez, Vanessa Amelia; Durá, Óscar Juan; Alonso, José Antonio; Ávila Brande, David; Prado Gonjal, Jesús De La PazThe combination of microwaves with other classical synthetic methods may be considered as a powerful tool for the preparation of metal oxides and metal chalcogenides. This approach allows the modification of the reaction kinetic significantly by shortening the processing time to minutes and it minimizes the energy consumption during the synthesis. In this work, potential thermoelectric compounds, which enable the direct conversion of temperature gradients into useful electric energy, have been produced by means of microwave-chemistry routes. Pure phases of SnS1-xSex (x = 0, 0.2, 1) have been synthesized in just 1 min by using microwave-hydrothermal synthesis. Moreover, Zn0.98M0.02O (M = Al, Ga) rods were formed by microwave-coprecipitation method in 5 min. Besides, 8 min of microwave-heating were enough for the combustion of Sr1-xLaxTiO3-δ (x = 0, 0.05, 0.1). In all cases, the utilization of microwave radiation produces high-quality phases. A comprehensive study of the structural, microstructural and thermoelectric properties of the microwave-synthesized materials is here performed by means of X-ray diffraction, SEM, HRTEM and temperature dependence measurements of Seebeck coefficient, electrical conductivity and thermal conductivity.- Project number: 121
Item Nuevos modelos cristalográficos y mineralógicos para impresoras 3D(2023) Pina Martínez, Carlos Manuel; López-Acevedo Cornejo, María Victoria; Ávila Brande, David; Prado Gonjal, Jesús De La Paz; Cascos Jiménez, Vanessa Amelia; Cabeza Llorca, Ana; Crespo López, Ángel; Fernández Sequeira, Fernando Vinicio; Otero Díaz, Luis Carlos - Project number: 24
Item Diseño de modelos cristalográficos y mineralógicos para impresoras 3D(2022) Pina Martínez, Carlos Manuel; Ávila Brande, David; Cabeza Llorca, Ana; Cascos Jiménez, Vanessa Amelia; Castillo Martínez, Elisabet; Crespo López, Ángel; López-Acevedo Cornejo, María Victoria; Otero Díaz, Luis Carlos; Pimentel Guerra, Carlos; Prado Gonjal, Jesús De La PazEl proyecto DISEÑO DE MODELOS CRISTALOGRÁFICOS Y MINERALÓGICOS PARA IMPRESORAS 3D es un proyecto de continuación de tres proyectos Innova-Docencia anteriores (nº 5, nº 98 y nº 24) y tenía como finalidad elaborar nuevos modelos cristalográficos y mineralógicos para su impresión mediante impresoras 3D. Item Perspective on Crystal Structures, Synthetic Methods, and New Directions in Thermoelectric Materials(Small Structures, 2024) González‐Barrios, Marta; Tabuyo Martínez, Marina; Ávila Brande, David; Prado Gonjal, Jesús De La PazThis review explores the state‐of‐the‐art of thermoelectric materials, covering different crystalline structures and material families (e.g., chalcogenides, Zintl phases, skutterudites, clathrates, oxides, half‐Heusler, organic–inorganic composites, metal–organic frameworks, and silicides). It examines their corresponding thermoelectric properties while considering the synthesis methods employed, paying significant attention to those that particularly follow sustainable routes. Additionally, the work addresses current challenges in the field, such as enhancing stability at high temperatures and reducing manufacturing costs. The understanding gained in this field opens avenues for designing more efficient and sustainable devices to convert waste heat into electrical energy, thereby advancing cleaner technologies.Item From theory to experiment: BaFe0.125Co0.125Zr0.75O3-delta, a highly promising cathode for intermediate temperature SOFCs(Journal of Materials Chemistry A, 2020) Sánchez Ahijón, Elena; Marín Gamero, Rafael; Molero Sánchez, Beatriz; Ávila Brande, David; Manjón Sanz, Alicia; Fernández Díaz, M. Teresa; Morán, Emilio; Schmidt, Rainer; Prado Gonjal, Jesús De La PazIn a recent theoretical study [Jacobs et al., Adv. Energy Mater., 2018, 8, 1702708], BaFe0.125Co0.125Zr0.75O3-delta was predicted to be a stable phase with outstanding performance as an auspicious cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). It is shown here that the theoretical predictions are valid. The material can be synthesized by the citrate method as a single cubic Pm3m phase with a significant amount of oxygen vacancies, randomly distributed in the anionic sublattice facilitating oxygen vacancy conduction. A thermal expansion coefficient of 8.1 x 10(-6) K-1 suggests acceptable compatibility with common electrolytes. Electrochemical impedance spectroscopy of symmetrical cells gives an area-specific resistance of 0.33 Omega cm(2) at 700 degrees C and 0.13 Omega cm(2) at 800 degrees C. These values are reduced to 0.13 Omega cm(2) at 700 degrees C and 0.05 Omega cm(2) at 800 degrees C when the material is mixed with 30 wt% Ce0.9Gd0.1O2-delta.