Publications by authors named "Cecil N M Ouma"

Anion-exchange membranes (AEMs) are key components in relatively novel technologies such as alkaline exchange-based membrane fuel cells and AEM-based water electrolyzers. The application of AEMs in these processes is made possible in an alkaline environment, where hydroxide ions (OH) play the role of charge carriers in the presence of an electrocatalyst and an AEM acts as an electrical insulator blocking the transport of electrons, thereby preventing circuit break. Thus, a good AEM would allow the selective transport of OH while preventing fuel (e.

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Unlabelled: Hydroxychloroquine (HCQ) and favipiravir (FPV) are known to be effective antivirals, and there are reports about their use to fight the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) despite that these are not conclusive. The use of combined drugs is common in drug discovery, and thus, we investigated HCQ and FPV as a combined drug. The density functional theory method was used for the optimization of geometries, spectroscopic analysis and calculation of reactivity parameters.

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The proverb "Old is gold" is applicable in drug discovery and the proverb "All that Glitters is not Gold" is also appropriate. In the COVID-19 era, there has been a race for drugs to be effective against SARS-CoV-2. There are reports about the uses of Remdesivir and Favipiravir as existing antivirals against virus but none have been conclusive so far.

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Poor electrical conductivity and large volume expansion during repeated charge and discharge is what has characterized many battery electrode materials in current use. This has led to 2D materials, specifically multi-layered 2D systems, being considered as alternatives. Among these 2D multi-layered systems are the graphene-based van der Waals heterostructures with transition metal di-chalcogenides (TMDCs) as one of the layers.

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Article Synopsis
  • The study investigates the effects of lanthanide doping (about 2% concentration) on the properties of MoS monolayers using advanced computational methods (DFT+U), focusing on elements like Ce, Eu, Gd, Lu, and Tm.
  • It finds that Eu, Gd, and Tm can significantly increase the magnetization of MoS while showing half-metallic behavior in certain doped systems, indicating a potential for magnetic semiconductors.
  • The doping also improves the optical characteristics and photocatalytic properties of MoS, resulting in a shift of optical absorption to lower energies and notable changes in electron energy loss and dielectric properties.
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We investigate the structural, electronic and optical properties of transition metal doped triclinic monolayered rhenium disulfide and diselenide (ReS and ReSe) by means of quantum mechanical calculations. The calculated electronic band gaps for ReS and ReSe monolayers are 1.43 eV and 1.

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