Catalytic systems based on supported noble metals are extensively studied because of their widespread application. Discussions remain about the nature active species, whether they atomically dispersed or nanoparticles, and reactivity. In this work, combining in situ/operando spectroscopy with theoretical modeling, we propose a phase diagram platinum ceria, demonstrating that it reversibly chang...

In this research, the electrocatalytic activity of platinum-ruthenium nanoparticles on carbon nanotubes and black in methanol oxidation reaction has been investigated. Moreover, electrochemical performance a single passive direct fuel cell run by these two different electrocatalysts reported. Physical characterization tests reveal superiority PtRu nanotubes. Based voltammetry outcomes, it was f...

Although carbon-supported platinum (Pt/C) has been generally used as a catalyst for the oxygen reduction reaction (ORR) in fuel cells, its practical application is limited by corrosion of carbon support. Therefore, it essential to develop new self-supported catalysts ORR. Noble metal aerogels represent highly promising with large specific surface area and excellent electrocatalytic activity. Cl...

Platinum extraction from spent reforming catalysts in iodine solutions under atmospheric pressure at different temperatures, acid concentration, and iodine spices concentration, catalyst particle size, and impeller agitation speed have been studied in our group. In this system, platinum is oxidized from spent catalyst with I3¯ that is formed ...

platinum is a metallic element, which may react with our cellular component through its involvement in cancer chemotherapy medications. cisplatin is one of the most useful antineoplastic drugs against human ovarian carcinoma, which has the central element of platinum in its structure. the nature of chemical interaction between platinum and cellular macromolecules is yet to be understood. we exa...

Early detection of resistance to platinum-based therapy is critical for improving the treatment of ovarian cancers. We have previously found that increased expression of annexin A3 is a mechanism for platinum resistance in ovarian cancer cells. Here we demonstrate that annexin A3 can be detected in the culture medium of ovarian cancer cells, particularly these cells that express high levels of ...

Carbon nanofiber (CNF)-supported platinum catalysts have been prepared using Pt(NH3)4(NO3)2 as precursor by two different ion exchange techniques, one at a constant pH and one in which the pH is gradually and homogeneously increased from 3 to 6 by hydrolysis of urea. The latter method resembles the procedure of homogeneous deposition precipitation (HDP). Characterization of the CNF support was ...

The tissue distribution and normal tissue toxicity of cisplatin (cDDP) administered as poly-lactide-co-glycolide (PLAGA) microspheres, developed for loco-regional administration of cDDP to the liver, were studied in Wag/Rij rats. Venoportal administration of this formulation resulted in a reduction in total systemic and renal toxicity, which correlated with a decrease in normal tissue exposure ...