The influence of hydrazine reduction on metal dispersion, particle size distribution, and support morphology was investigated for a series of bimetallic Ru-AuiMgO catalysts. The catalysts were prepared by impregnation of MgO with chlorine-containing precursor salt solutions. Hydrazine reduction significantly lowered the residual chlorine content of the catalysts and allowed the formation of hig...

The effect of cobalt precursor on the structure of Co supported multi-walled carbon nanotubes (MWCNTs) were studied by using X-ray photoelectron spectroscopy (XPS). MWCNTs were treated with a mixture of nitric and sulfuric acids and decorated with cobalt and/or cobalt oxides via aqueous impregnation solutions of cobalt nitrate or cobalt acetate followed by reduction in hydrogen. XPS was mainly ...

Ce-doped MIL-125-NH2 photocatalysts (Ce/TiMOFs) were synthesized by a facile impregnation-coordination method, during which the doped Ce species could not only extend visible-light absorption edge but also provide new reactive sites for promoting charge transfer and selectivity of two-electron O2 reduction. The optimal Ce/TiMOFs-0.010 achieved rate H2O2 yield 2464 μM h-1 g-1 with ∼3.4-fold impr...

MoS2/bio-template carbon composite materials with outstanding photocatalytic degradation performance were constructed and synthesized by an impregnation–hydrothermal–calcination (IHC) method. Composites of the same type a direct-impregnation–calcination (DIC) method for comparison. The results showed that calcination process was obtained from biotemplate preserved structure. IHC petal-like MoS2...

Characterization by temperature-programmed reduction (TPR) • Alumina-supported nickel catalysts characterized temperature programmed reduction. The interactions between the support and metals have been studied. Several Ni-Pd Ni-Mo bimetallic various Ni-Mo-Pd trimetallic analyzed. order of impregnation is decisive in reducing properties. are used to facilitate many reactions at scales. However, ...

Selective reduction of NOx by H2 and CO in excess O2 was studied using a Pd/Al2O3 catalyst. Incipient wetness impregnation into Al2O3 was done using PdCl2 as the metal precursor. The NOx conversion profile was maximal at 423 K (up to 95.2% for 250 ppm CO), at which temperature complete oxidation of H2 and CO occurred. There is a very strong synergic effect when both CO and H2 are simultaneously...

The kinetics and mechanism of oxygen reduction reaction (ORR) on the surface Pt PtAgFe catalysts supported by ordered mesoporous carbon (OMC) were investigated. Metal particles loaded wet impregnation-reduction method two types OMC, one being surface-modified HNO3 other unmodified. Cyclic voltammetry measurements showed that modified namely Pt/OMC-M, had highest electroactive area among OMC-sup...