Influence of Electrochemical Pretreatment Conditions of PtCu/C Alloy Electrocatalyst on Its Activity.

A carbon supported PtCu/C catalyst, which demonstrates high activity in the oxygen electroreduction and methanol electrooxidation reactions in acidic media, has been obtained using a method of chemical reduction of Pt (IV) and Cu (2+) in the liquid phase. It has been found that the potential range of the preliminary voltammetric activation of the PtCu/C catalyst has a significant effect on the de-alloyed material activity in the oxygen electroreduction reaction (ORR). High-resolution transmission electron microscopy (HRTEM) demonstrates that there are differences in the structures of the as-prepared material and the materials activated in different potential ranges.

Effective Platinum-Copper Catalysts for Methanol Oxidation and Oxygen Reduction in Proton-Exchange Membrane Fuel Cell.

The behavior of supported alloyed and de-alloyed platinum-copper catalysts, which contained 14-27% wt. of Pt, was studied in the reactions of methanol electrooxidation (MOR) and oxygen electroreduction (ORR) in 0.1 M HClO solutions.

[Hemostasis during MARS therapy and hemodiafitration in patiens with acute renal-hepatic failure].

Objective: to study the dynamics of the haemostatic system, depending on coagulopathy type and efferent therapy method (HDF, MARS) in patiens with acute renal-hepatic failure. As a complex of intensive therapy, all the patients were trated extracorporeal techniques: HDF therapy in group I (n = 121) and MARS in group 1 (n = 62). Patients were aged from 18 to 67 years.