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Electrochemical insights into the direct dissolution of impure sphalerites and their partial oxidation in an acidic environment.
Sci Rep
January 2025
Department of Mining and Explosives Engineering, Missouri University of Science and Technology, Rolla, MO, 65409, USA.
This study examined the electrodissolution mechanism of five impure sphalerite samples, which differ significantly in purity levels, along with their partially oxidized counterparts in a 0.5 M HSO. Partially oxidized samples were prepared through an incomplete leaching of sphalerite using HSO with Fe(SO).
View Article and Find Full Text PDFMetal-oxide phase transition of platinum nanocatalyst below fuel cell open-circuit voltage.
Nat Commun
January 2025
ICGM, Univ. Montpellier, CNRS, ENSCM, 34095, Montpellier, France.
The long-term stability of Pt-based catalysts is critical to the reliability of proton exchange membrane fuel cells (PEMFCs), and receives constant attention. However, the current knowledge of Pt oxidation is restricted to unrealistic PEMFC cathode environment or operation, which questions its practical relevance. Herein, Pt oxidation is investigated directly in a PEMFC with stroboscopic operando high energy X-ray scattering.
View Article and Find Full Text PDFDevelopment and In-Vitro Tuning of Piperine Containing Solid Lipid Microparticles for the Treatment of Rheumatoid Arthritis.
AAPS PharmSciTech
January 2025
Department of Pharmaceutics, College of Pharmacy, King Saud University, PO Box 2457, 11451, Riyadh, Saudi Arabia.
The current project was designed to develop piperine-loaded solid lipid microparticles (SLMs) to assess the anti-arthritic potential of piperine (PIP). Variable proportions of carnauba wax, beeswax, and tween 80 were employed for preparing SLMs by using the solvent evaporation technique. The developed formulations were subjected to particle size measurements, entrapment efficiency (EE), and zeta potential (ZP) determination.
View Article and Find Full Text PDFTernary NASICON-Type NaVMnFe(PO)/NC@CNTs Cathode with Reversible Multielectron Reaction and Long Life for Na-Ion Batteries.
ACS Appl Mater Interfaces
January 2025
Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, Lanzhou 730050, China.
Na superionic conductor (NASICON)-structure NaMnV(PO) (NVMP) electrode materials reveal highly attractive application prospects due to ultrahigh energy density originating from two-electron reactions. Nevertheless, NVMP also encounters challenges with its poor electronic conductivity, Mn dissolution, and Jahn-Teller distortion. To address this issue, utilizing N-doped carbon layers and carbon nanotubes (CNTs) for dual encapsulation enhances the material's electronic conductivity, creating an effective electron transport network that promotes the rapid diffusion and storage of Na.
View Article and Find Full Text PDFUnravelling the cleavage-rate relationship from both the experimental and theoretical standpoint: The instance of fluorite dissolution.
J Colloid Interface Sci
January 2025
University of Zagreb, Faculty of Science, Department of Chemistry, Zagreb, HR-10000, Croatia.
The phenomenon of solid dissolution into a solution constitutes a fundamental aspect in both natural and industrial contexts. Nevertheless, its intricate nature at the microscale poses a significant challenge for precise quantitative characterization at a foundational level. In this work, the influence across three specific cleavage planes, namely (100), (111), and (110) on the dissolution kinetics of fluorite in aqueous environments was examined from both experimental and theoretical standpoints.
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