ChemCatChem

Wiley Online Library : ChemCatChem

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Understanding the synergistic effects observed when using tethered dual catalysts for heat and light activated catalysis

Dual catalysis, where two different catalysts work cooperatively to promote a chemical reaction, is an important synthetic approach as it can allow a wide range of unique reactivity to be accessed. Whilst most dual catalysis strategies utilise separate catalysts in the reaction mixture, there is a growing interest in using tethered dual catalysts to...

Discerning Activity and Inactivity in Earth‐Abundant Molecular Water Oxidation Catalysts

Most computational studies on the oxygen evolution reaction (OER) focus on systems which are known to catalyze this process experimentally. This work computationally examines a number of earth‐abundant metal (M = Mn, Fe, Co, Ni) complexes with tetradentate coordinating anionic ligands which, subject to the same experimental conditions, either evolve...

Transformations of bio‐sourced 4‑hydroxyphenylpropanoids based on olefin metathesis

4‐Hydroxyphenylpropanoids represent an important class of natural products directly extracted from plants or derived from lignocelullosic materials. They are phenol derivatives equipped with a terminal propenyl group, which is perfectly suited for applications involving olefin metathesis processes. In this review, we show that conditions have been found...

Revealing the Li2O2 Nucleation Mechanisms on CeO2 Catalysts for Lithium‐Oxygen Batteries

Nucleation fascination :Ceria nanoparticles (NPs) added to the cathode improve the performance of the lithium‐oxygen battery. In the early stages of Li2O2 nucleation at this catalyst, the adsorption energies are stronger than on graphene or the already formed Li2O2. The best catalytic conditions are found for the reduced (110) facet. Abstract...

Syntheses of Pt‐Ni Hollow Nanoalloy for Hydrogen Generation from Catalytic Hydrolysis of Ammonia Borane

Hydrogen Max : The fabrication of low‐cost and efficient catalysts by reducing the amount and maximizing the utilization efficiency of noble metal is indispensable for the hydrolytic dehydrogenation of ammonia borane. A series of novel Pt−Ni nanoalloys with hollow structures were successfully synthesized and exhibited high activity for H2 evolution...

Gold(I)‐Thiolate Oligomers for Catalytic Hydrogenation of Nitroaromatics in Aqueous and Organic Medium

Thiolated gold nanoclusters (AuNCs) have been introduced to efficiently and selectively catalyze the hydrogenation of nitroaromatics due to the strong interaction of their S‐Au‐S staple motifs with the nitro groups of nitroaromatics. However, without a gold core, gold(I)‐thiolate oligomers (AuSOs) with S‐Au‐S staple motifs are rarely explored as catalysts...

Phosphine‐oxide‐catalyzed Enantioselective Cross‐aldol Reaction of Aldehydes with Trichlorosilane as Lewis Acid Promoter

A hypervalent silicon complex between trichlorosilane and a chiral phosphine oxide acts as an effective Lewis acid mediator that successfully promotes highly enantioselective cross‐aldol reactions between two aldehydes. The high yielding transformation is realized with the assistance of triisobutylamine, which does not decompose trichlorosilane but...

Reactivation of CeO2‐based Catalysts in the HCl Oxidation Reaction: In situ Quantification of the Degree of Chlorination and Kinetic Modeling

Deactivation of CeO2‐based catalysts in the HCl oxidation reaction proceeds via selective bulk chlorination of the active CeO2 component to form CeCl3×nH2O. We study the reactivation of two bulk‐chlorinated CeO2‐based Deacon catalysts by oxygen treatment at 430°C, namely pure CeO2 and 20 mol% of CeO2 supported on preformed ZrO2 particles (20CeO2@ZrO2),...

Pd/Lewis acid synergy in macroporous Pd@Na‐ZSM‐5 for enhancing selective conversion of biomass

Pd nanometal particles encapsulated in macroporous Na‐ZSM‐5 with only Lewis acid sites have been successfully synthesized by a steam‐thermal approach. The synergistic effect of Pd and Lewis acid sites have been investigated for significant enhancement of the catalytic selectivity towards furfural alcohol in furfural hydroconversion.

Recent Advance in Silver‐Mediated Radical Difunctionalization of Alkenes

Radical‐initiated difunctionalization of alkenes is one of the most important methods in organic synthesis and medicinal chemistry, which can be applied to synthesize value complex compounds as well as structural motifs that found in bioactive natural products and pharmaceuticals. In recent years, impressive progress have been made in this area with...

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