Oxygen Reduction Reaction (ORR) performance of iron and nitrogen co-doped porous carbon nanoparticles (Fe-NPC) with various physical and (electro) chemical properties have been investigated. Fe-NPC nanoparticles are synthesized via a facile soft-templating procedure by using Iron (III) chloride hexa-hydrate as iron precursor and aminophenol-formaldehyde resin as both carbon and nitrogen precurs...

During the past few years, a great deal of effort has been devoted to the anchoring of catalysts into solid coordination networks in order to achieve heterogeneous catalysts. In this sense, an innovative approach consists in using the coordination-network synthons both as structural units and as catalysts. Regarding the latter, metalloporphyrins are suitable candidates for synthons. In fact, a ...

A class of heterogeneous catalysts based on commercial bentonite from natural origin, containing at least 80 wt% of montmorillonite clay, was designed to transform selectively and under mild conditions toxic organosulfur and organophosphorus chemical warfare agents into non-noxious products with a reduced impact on health and environment. The bentonite from the natural origin was modified by in...

one-pot reaction of aldehydes or ketons with aniline derivatives was performed using nabh4 and fe3o4 magnetic nanoparticles (mnps). the optimum amount of fe3o4 mnps was 5 mol% under solvent free condition. the corresponding products were obtained in good to excellent yields. the magnetically recoverable iron oxide nanoparticles are found to be efficient for synthesis of amine derivatives. these...

We investigate the use of a series iron-based metal–organic frameworks as precursors for manufacturing isobutane dehydrogenation catalysts. Both as-prepared and spent catalysts were characterized by PXRD, XPS, PDF, ICP-OES, CHNS+O to determine physicochemical properties materials active phases responsible catalytic activity. In contrast previous literature, our results indicate that (i) formati...

Abstract Nickel-based catalysts reach a high activity for the hydrogen oxidation reaction (HOR) in anion exchange membrane fuel cells. While incorporation of iron significantly decreases HOR overpotential on NiFe-based catalysts, reason enhanced remains only partially understood. For first time, situ 57 Fe Mössbauer spectroscopy is used to gain insights into iron-related composition at differen...

Cobalt-iron oxyhydroxides (CoFeOOHx) are among the most active catalysts for oxygen evolution reaction (OER). However, their redox behavior and electronic chemical structure of sites still ambiguous. To shed more light on this, complete rapid reconstruction four helical cobalt-iron borophosphates with different Co:Fe ratios into disordered can be achieved, which electrolyte-penetrable thus tran...

The paper relates to a catalyst, comprising copperchromium spinel, coated on carrier γ-Al2O3. The effect of preparation conditions on the active component composition and activity behavior of the catalysts is discussed. It was found that the activity of carbon monoxide, DME, formaldehyde and methanol oxidation reaches a maximum at an active component content of 20 – 30 wt. %. Temperature calcin...

Fe-based catalytic sites for the reduction of oxygen in acidic medium have been identified by Fe Mössbauer spectroscopy of Fe/N/C catalysts containing 0.03 to 1.55 wt% Fe, which were prepared by impregnation of iron acetate on carbon black followed by heat-treatment in NH3 at 950 1C. Four different Fe-species were detected at all iron concentrations: three doublets assigned to molecular FeN4-li...