Browsing by Author "Trejo, Gabriel; 0000-0001-8202-2366"

Now showing 1 - 2 of 2
  • Artículo
    Effects of heat treatment temperature on the morphology, composition, and electrocatalytic properties of electrodeposited nib thin films towards OER
    (2022-07-25) Becerril Estrada, V.; Gonzalez Gutierrez, Linda Victoria; Vazquez Arenas, Jorge Gabriel; H. Lara, Rene; Manríquez, Juan; Sepulveda Guzman, Selene; Ortega, Raul; Mendez Albores, Alia; Trejo, Gabriel; GONZALEZ GUTIERREZ, LINDA VICTORIA; 37804; VAZQUEZ ARENAS, JORGE GABRIEL; 105516; Manríquez, Juan; 0000-0003-2869-1803; Sepulveda Guzman, Selene; 0000-0001-6578-9258; Mendez Albores, Alia; 0000-0002-9047-8766; Trejo, Gabriel; 0000-0001-8202-2366
    "In this study, we evaluate the morphology, composition, and electrocatalytic properties of NiB films formed by electrodeposition and thermally treated at 520 and 650 °C. The films were characterized by thermogravimetric analysis, scanning electron microscopy, atomic force microscopy, glow discharge spectroscopy, and X-ray diffraction. The morphology and composition of the films were affected by the thermal treatment, showing an increase and decrease in oxygen and boron concentrations respectively. This behavior is associated with the decomposition of the Ni2B and Ni3B, as well as the formation of NiO with increasing temperature. Linear voltammetry, chronoamperometry, and electrochemical impedance spectroscopy were used to evaluate the electrocatalytic activity of the films towards the oxygen evolution reaction (OER). NiB films without thermal treatment showed the lowest onset potential for the OER (1.47 V vs RHE), overpotential (400 mV), Tafel slope (68 mV dec −1 ), and charge transfer resistance (2.4 Ω). This finding reveals that the NiB electrocatalyst without thermal treatment presents similar or superior performance to other electrocatalysts reported in the literature. While the OER kinetics of the NiB electrocatalyst decreases when it is thermally treated at 520 or 650 °C because of the possible Ni2B and Ni3B decompositions and NiO formation".
  • Artículo
    Recubrimientos metálicos antimicrobianos
    (2022-05-28) Trejo, Gabriel; Rios Álvarez, Claudia; Méndez Albores, Alia; Trejo, Gabriel; 0000-0001-8202-2366; Rios Álvarez, Claudia; 0000-0002-6667-8290; Méndez Albores, Alia; 0000-0002-9047-8766
    "Datos epidemiológicos reportados por la Organización Mundial de la Salud (OMS) indican que las bacterias y virus (microbios) son las principales causantes de la transmisión de enfermedades infecciosas de una persona a otra. Actualmente, las enfermedades causadas por la transmisión de patógenos virales y bacterianos son el principal foco de atención del sector salud en el mundo. La OMS reporta que cerca de 20 mil personas mueren diariamente por este tipo de enfermedades, lo que constituye un serio problema de salud pública a nivel mundial, que con el surgimiento de la pandemia SARS-COV-2 se ha agravado considerablemente, teniendo importantes consecuencias económicas y sociales. La OMS estima que si no se toman acciones preventivas contra los microorganismos patógenos, la humanidad estará expuesta a sufrir infecciones intratables a causa del aumento de la resistencia de bacterias y virus a los antibióticos".