Studies on the Formation of Catalytically Active PGM Nanoparticles from Model Solutions as a Basis for the Recycling of Spent Catalysts

The paper presents basic studies on the precipitation of platinum, palladium, rhodium, and ruthenium nanoparticles from model acidic solutions using sodium borohydride, ascorbic acid, and sodium formate as reducing agents and polyvinylpyrrolidone as a stabilizing agent. The size of the obtained PGM particles after precipitation with NaBH4 solution does not exceed 55 nm. NaBH4 is an efficient reducer; the precipitation yields for Pt, Pd, Ru, Rh are 75, 90, 65 and 85%, respectively. By precipitation with ascorbic acid, it is possible to efficiently separate Pt, Rh, and Ru from Pd from the two-component mixtures. The obtained Pt, Pd, and Rh precipitates have the catalytic ability of the catalytic reaction of p-nitrophenol to p-aminophenol. The morphological characteristic of the PGM precipitates was analyzed by AFM, SEM-EDS, and TEM.

Copper-based MOF, Cu3(SDBA)2(HSDBA), as catalyst for efficient reduction of 4-nitrophenol in the presence of sodium borohydride

Herein, we report the synthesis of the copper-based MOF, Cu3(SDBA)2(HSDBA), using solvothermal method. The physicochemical properties of the as-prepared sample were examined by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray...

Acid Catalyzed Synthesis of substituted-n-((1, 3-diphenyl-1h-pyrazol-4-yl) methyl) benzenamine

A new derivative synthesis of Substituted-N-((1, 3-diphenyl-1h-pyrazol-4-yl) methyl) benzenamine has attempted by using commonly available key starting materials Acetophenone (1) and substituted phenyl hydrazine in presence of sulfuric acid catalyst and alcohol solvent to afford potential antiviral active analogues. The synthesis proceeds through Vilsmeier-Haack reaction followed by reductive amination by using sodium borohydride.

Platinum Nanoparticles Modified Copper/Titanium Electrodes as Electrocatalysts for Borohydride Oxidation

In this study, sodium borohydride oxidation has been investigated on the platinum nanoparticles modified copper/titanium catalysts (PtNPsCu/Ti), which were fabricated by employing the electroless copper plating and galvanic displacement technique. ICP-OES, XRD, FESEM, and EDX have been used to characterize PtNPsCu/Ti catalysts’ composition, structure, and surface morphology. The oxidation of sodium borohydride was examined on the PtNPsCu/Ti catalysts using cyclic voltammetry and chrono-techniques.