Catalytic wet oxidation has proved to be effective at eliminating hazardous organic compounds, such as phenol, from waste waters. However, the lack of active long-life oxidation catalysts which can perform in aqueous phase is its main drawback. This study explores the ability of bimetallic supported catalysts to oxidize aqueous phenol solutions using air as oxidant. Combinations of 2% of CoO, F...

The low activity of the oxygen reduction reaction in polymer electrolyte membrane fuel cells is a major barrier for electrocatalysis, and hence needs to be optimized. Tuning the surface electronic structure of platinum-based bimetallic alloys, a promising oxygen reduction reaction catalyst, plays a key role in controlling its interaction with reactants, and thus affects the efficiency. Here we ...

Hydrogen energy has become the most potential source due to its high calorific value and environment-friendly combustion products. However, there are huge economic problems in hydrogen storage transportation. can be prepared by catalysis a way of reducing cost speeding up speed which is core idea electrocatalytic water decomposition for production. In this work, we developed an electrode materi...

The chromium/vanadium bimetallic Phillips catalysts developed by our research group have been proved to be a promising process to produce bimodal polyethylene using a single-reactor process. The vanadium loading of CrV-1/1, CrV-1/2, and CrV-1/3 has a significant effect on the polymerization activity, product molecular weight (MW), as well as th...

Diesel oxidation catalysts (DOC) were investigated for activity, NO conversion stability, and sulfur poisoning/regeneration on Pd/Al2O3, Pt/Al2O3, Pd-Pt/Al2O3 catalysts. The Pd/Al2O3 catalyst was more active CO hydrocarbon (C3H6 C3H8) oxidation, while the Pt/Al2O3 efficiently oxidized NO. formation of a Pd-Pt alloy in maintained Pd reduced phase, resulting superior activity this CO, C3H6, compa...

Abstract A new oxygen bridged [Cu‐O‐Ba] bimetallic catalyst is synthesized. The novel used for Csp2‐O cross‐coupling reactions of phenols with haloarenes. Iodo‐, bromo‐, and unactivated chloro‐arenes could be coupled aryl efficiently in high yield. Moreover, functional groups were well tolerated using this protocol. Eco‐friendly, air stable, recyclable efficient.

Background Catalysts improve the rate or selectivity of chemical reactions without being consumed in the chemical reaction. “Supported heterogeneous catalysts” consist of catalytic active sites carried on the surfaces of porous solids, known as “supports”. Such catalytic materials are especially important for chemical manufacturing because they minimize the loss of valuable catalytic materials ...

This study investigates the effect of Pt/Pd ratio on oxidation activity and sulfur poisoning/regeneration diesel catalysts (DOC) using beta zeolites with high siliceous content as support. Formation Pt-Pd alloy leads to contraction cell lattice Pt in bimetallic catalysts, improving not only sintering resistance but also retaining a fraction Pd Pd2+ form. Moreover, improves particles, which enha...

ABSTRACT Infrared spectroscopy has been employed for a detailed characterization of ZrO2 and CeO2/ZrO2 supported nickel and copper/nickel catalysts to be utilized for methane decomposition. Adsorption of CO at 303 K was performed in order to determine the surface composition and accessible adsorption sites. Alloy formation occurred during reduction, as indicated by a red-shift of the vibrationa...

Elucidation of complex heterogeneous catalytic mechanisms at the molecular level is a challenging task due to the complex electronic structure and the topology of catalyst surfaces. Heterogeneous catalyst surfaces are often quite dynamic and readily undergo significant alterations under working conditions. Thus, monitoring the surface chemistry of heterogeneous catalysts under industrially rele...