Browsing by Author "Soliz, Alvaro"

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    High Performance of Mn2O3 Electrodes for Hydrogen Evolution Using Natural Bischofite Salt from Atacama Desert: A Novel Application for Solar Saline Water Splitting
    (2024) Galleguillos-Madrid, Felipe M.; Salazar-Avalos, Sebastian; Fuentealba, Edward; Leiva-Guajardo, Susana; Caceres, Luis; Portillo, Carlos; Sepulveda, Felipe; Brito, Ivan; Cobos-Murcia, Jose Angel; Rojas-Moreno, Omar F.; Jimenez-Arevalo, Victor; Schott, Eduardo; Soliz, Alvaro
    Solar saline water splitting is a promising approach to sustainable hydrogen production, harnessing abundant solar energy and the availability of brine resources, especially in the Atacama Desert. Bischofite salt (MgCl26H2O) has garnered significant attention due to its wide range of industrial applications. Efficient hydrogen production in arid or hyper arid locations using bischofite solutions is a novel and revolutionary idea. This work studied the electrochemical performance of Mn2O3 electrodes using a superposition model based on mixed potential theory and evaluated the superficial performance of this electrode in contact with a 0.5 M bischofite salt solution focusing on the hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) that occur during saline water splitting. The application of the non-linear superposition model provides valuable electrochemical kinetic parameters that complement the understanding of Mn2O3, this being one of the novelties of this work.
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    Study of the reaction mechanism in hydrogen production using metal-free Schiff base as a catalyst
    (2023) Muena, Juan Pablo; Zamora, Pedro Pablo; Bieger, Klaus; Soliz, Alvaro; Haribabu, Jebiti; Aguirre, Maria Jesus; Marquez, Paulina; Quezada, Diego; Honores, Jessica
    Understanding the hydrogen evolution reaction and its mechanism is crucial for numerous practical applications in the realm of green energy. The development and discovery of new technologies or alternatives hold great significance in generating hydrogen at a low cost. In this study, we propose a novel catalyst, N, N'-bis(2-hydroxy1-naphthaldehyde)-o-phenylenediamine ([naph]2-o-ph), which is a Schiff base, for hydrogen production. The novelty lies in utilizing the organic Schiff base system and the proposed mechanism for hydrogen evolution, involving protonation and electron exchange on the Schiff base. Both experimental and theoretical results highlight the high capability of the Schiff base in generating hydrogen, providing valuable insights for potential applications in water electrolysis.