Publications by authors named "Jamillah Muhyuddin"
Background: Childhood remains a vulnerable period and a key determiner for adult health. Various illnesses experienced by children in their early years determine future performance and contribution to society. Acute and chronic infectious diseases, undernutrition, and early childhood non-communicable diseases have greatly been linked to intellectual disability, poor childhood development, increased morbidity, and household and healthcare economic costs.
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- Fe-N-Cs are emerging as cost-effective alternatives to rare and expensive platinum group metals for use in fuel cell applications, particularly for the oxygen reduction reaction (ORR).
- The typical method of using silica templates for these materials involves hazardous hydrofluoric acid, but a new approach uses in-situ generated HF from NHHF and NaF to remove the silica safely.
- This modified method shows that a specific molar ratio of etching agents can effectively dissolve silica without damaging the porous structure of the electrocatalysts, resulting in improved performance, especially with NHHF-washed Fe-N-C catalysts achieving an exceptional onset potential of 970 mV in alkaline solutions.
This study delves into the critical role of customized materials design and synthesis methods in influencing the performance of electrocatalysts for the oxygen reduction reaction (ORR) in anion exchange membrane fuel cells (AEMFCs). It introduces a novel approach to obtain platinum-free (PGM-free) electrocatalysts based on the controlled integration of iron active sites onto the surface of silica nanoparticles (NPs) by using nitrogen-based surface ligands. These NPs are used as hard templates to form tailored nanostructured electrocatalysts with an improved iron dispersion into the carbon matrix.
View Article and Find Full Text PDFIn this manuscript, a comprehensive study is presented on Fe-based electrocatalysts with mono, bi, and tri-metallic compositions, emphasizing the influence of processing-structure correlations on the electrocatalytic activity for the oxygen reduction reaction (ORR) in the alkaline medium. These electrocatalysts were synthesized through the mixing of transition metal phthalocyanines (TM-Pc) with conductive carbon support, followed by controlled thermal treatment at specific temperatures (600 °C and 900 °C). An extensive analysis was conducted, employing various techniques, including X-ray Absorption Spectroscopy (XAS), Transmission Electron Microscopy (TEM), and X-ray Diffraction (XRD), providing valuable insights into the structural characteristics of the synthesized nanoparticles.
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- A novel method was developed to recycle waste surgical masks from COVID-19 by transforming them into valuable products like electrocatalysts and crude oil.
- The process involved using controlled-temperature pyrolysis to convert the masks into char, which was then functionalized to create electrocatalysts for important reactions like oxygen reduction and hydrogen evolution.
- This innovative approach not only addresses the disposal issue of surgical masks but also contributes to the circular economy by turning waste into useful materials.
Plastic waste causes severe environmental hazards, owing to inadequate disposal and limited recycling. Under the framework of circular economy, there are urgent demands to valorize plastic waste more safely and sustainably. Therefore, much scientific interest has been witnessed recently in plastic waste-derived electrocatalysts for the oxygen reduction reaction (ORR), where the plastic waste acts as a cost-effective and easily available precursor for the carbon backbone.
View Article and Find Full Text PDFObjective: To compare efficacy of high vs low dose rifaximin for primary prophylaxis of portosystemic encephalopathy (PSE) in decompensated liver cirrhosis.
Methods: In a quasi-experimental double blind randomized study at Services Institute of Medical Sciences (SIMS), Lahore from August 2017 to August 2018, patients of decompensated cirrhosis with no previous PSE were randomized to receive twice daily rifaximin 200mg in Group-A and 550mg in Group-B. Patients were followed for 6 months for development of PSE.