Iron and Manganese Containing Multi‐Walled Carbon Nanotubes as Electrocatalysts for the Oxygen Evolution Reaction ‐ Unravelling Influences on Activity and Stability

Electrocatalysis: Composite materials of iron, manganese and N‐rich carbon were synthesized, characterized and tested in the oxygen evolution reaction (OER). The best catalyst shows a low overpotential of 389 mV (at 10 mA/cm2) resulting from Fe3C and the N‐rich, Fe and Mn oxides containing MWCNT. The high stability (22.6 h) was assigned to the presence...

4h

Systematic Catalyst Screening of Zeolites with Various Frameworks and Si/Al Ratios to Identify Optimum Acid Strength in OME Synthesis

Structure‐activity relations were investigated for zeolite catalysts in the OMEx synthesis. High Si/Al ratio in zeolites were found to be favourable for the catalytic activity which indicates that the OMEx synthesis requires moderately strong acidity. HZSM‐5 114 revealed the best performance per single acid site. Abstract Oxymethylene dimethyl...

4h

Role of recrystallization in alkaline treatment on the catalytic activity of 1‐butene epoxidation

Two alkylol amines, which were ethanolamine (EOA) and triethanolamine (TEOA), were used to posttreat nanosized titanium silicalite‐1 (TS‐1) to improve its catalytic activity for 1‐butene epoxidation. Comparative studies were conducted to clarify the influences of the EOA and TEOA concentrations on the physico‐chemical properties through detailed characterization....

4h

Recent progress of CeO2‐TiO2 based catalysts for selective catalytic reduction of NOx by NH3

Selective catalytic reduction of NO x with NH 3 (NH 3 ‐SCR) is one of the widely used process to abate NO x emission from both stationary and mobile sources. Recently, CeO 2 ‐TiO 2 NH 3 ‐SCR catalysts, due to their excellent medium and high temperature activities, high N 2 selectivity and environmentally friendly, have attracted much...

4h

Amorphous‐crystalline Co‐B‐P catalyst for synergistically enhanced hydrogen evolution reaction

The inquiries of highly practical and stable catalysts for hydrogen evolution reaction (HER) retains challenging to accomplish continuable H 2 production through water electrolysis. In this work, the porous network Co‐B‐P amorphous‐crystalline catalyst was synthesized through a hydrothermal‐alternating immersion boronization‐phosphidation pathway....

1d

Chemoenzymatic stereoselective synthesis of substituted γ‐ or δ‐lactams with two chiral centers via transaminase‐catalysed dynamic kinetic resolution

The biocatalytic stereoselective synthesis of lactams with two chiral centers by a dynamic kinetic resolution strategy is demonstrated. Five transaminases were examinedfor the transamination of chemically synthesized substituted γ‐ or δ‐keto esters. The application of ( R )‐ and ( S )‐selective enzymes led to the corresponding chiral amines with moderate...

2d

Emerging catalysis in biomass valorisation: simple Zn(II) catalysts for fatty acids esterification and transesterification

Zinc(II) catalysis: This review reports the state of the art in the growing sector of esterification and transesterification of fatty acids and their esters catalyzed by Zn(II) species. The result is a framework in which this ion stands out thanks to its suited Lewis acidity, which is accompanied by a whole series of technical and ecological benefits...

2d

Microscale Atmospheric Pressure Plasma Jet as a Source for Plasma‐Driven Biocatalysis

Plasma jets and enzymes! A microscale atmospheric pressure plasma jet was employed to generate H2O2 for biocatalysis. Unspecific peroxygenase from Agrocybe aegerita was immobilized and used in a rotating bed reactor system. Conversion of ethylbenzene to (R)‐1‐Phol using plasma‐generated H2O2 was performed with high enantioselectivity and satisfactory...

2d

Gold Catalysts Synthesized Using a Modified Incipient Wetness Impregnation Method for Propylene Epoxidation

Au Catalysis: By using a modified incipient wetness impregnation method, we were able to optimize the Au : Ti ratio of Au/TS‐1 catalyst which exhibited improved catalytic performance in propylene epoxidation in the presence of hydrogen and oxygen. A key in this modified IWI is the hydrolysis of Au precursor before the impregnation. Abstract Propylene...

2d

Mesoporous Silica Supported Perovskite Oxides for Low Temperature Thermochemical CO2 Conversion

In this study, high yields of CO are reported from CO 2 using the silica (SiO 2 ) supported perovskite oxide, La 0.75 Sr 0.25 FeO 3 (LSF), composites in the reverse water gas shift chemical looping (RWGS‐CL) process. XRD patterns of materials formed upon adding SBA‐15 to the perovskite sol‐gel precursor solution indicated successful formation...

2d