Catalysis Communications最新文献

The unique ability of Cu⁺ to enhance C-C coupling makes it important in the field of CO₂ reduction reaction (CO₂RR) over Cu-based catalyst, while Cu⁺ is very prone to deactivation. Hereby, we propose a simple and feasible stabilization strategy to stabilize Cu⁺ species through reducing Cu-Mg-Al hydrotalcite by adding ascorbic acid, which owns stable product selectivity in a span of 6 h at −0.95 V vs.RHE. Characterization results show that the excellent stability is promoted by the heterostructure of Cu₂O and hydrotalcite with retained Cu⁺ species, which derives from Cu₂O and slow down the rapid reduction of Cu⁺ to Cu⁰.

The first manganese catalyzed tandem methodology for the synthesis of 2-aminobenzothiazoles from 2-bromophenyl isothiocyanate and differently substituted amines has been demonstrated. This protocol employs environmentally benign, cost-effective and readily available MnCl₂.4H₂O as the catalyst under air. The present strategy exhibits wide substrate scope and affords differently substituted 2-aminobenzothiazoles in moderate to good yields.

The study present the synthesis and applications of AgCl@Pd/Au/Ag trimetallic nanoparticles (NPs). The NPs are synthesized using BTI urine that facilitate their formation. The paper explores the crystalline structure and morphology of the NPs. In terms of applications, the NPs show superior catalytic activity in the reduction of compounds and enhanced degradation of dyes. They also exhibit antimicrobial properties against bacteria and antioxidant potential. The synthesis technique is environmentally friendly and economically efficient. The NPs have a high recyclability rate and can be produced in large quantities. Overall, the AgCl@Pd/Au/Ag trimetallic NPs have promising multifaceted applications.

In this study, we investigated the non-free radical pathways and active sites of N-doped graphene (N-rGO)-activated peroxymonosulfate (PMS). All as-prepared N-rGO samples could activate PMS and develop non-radical pathways. Graphitic-N sites were the major sites for N-rGO activation of PMS, and their content was positively related to the intensity of non-radical pathways. For sulfamethoxazole (SMX), the degradation rate by NH₃-rGO-10/PMS and non-radicals within 10 min was 93.66 and 75.34% respectively. In the presence of different anions and different concentrations of humic acid, the removal rate of SMX was still more than 90%.

This work investigates the impact of immobilization supports on the performance of Pd nanocatalysts in light-induced Suzuki coupling reactions by utilizing two model supports, mesoporous silica (SBA-15) and covalent triazine framework (CTF-Ph). Despite comparable Pd loading (0.3–0.5 wt%) and chemical states, under visible light illumination, Pd/CTF-Ph demonstrated a remarkable 40% reduction in activation energy, outperforming the 16% decrease observed with Pd/SBA-15. This superior performance is attributed to the light-absorbing properties of CTF-Ph and its facilitated pi-pi interaction toward reagents on the catalyst surface. Our findings offer valuable insights into the development of effective catalysts for light-assisted CC bond formation reactions.

Photocatalysts based on the anodic single-walled titania nanotubes modified with metal nanoparticles (Au, Pd, Pt) were prepared and investigated. The metal nanoparticles sizes are in a range from 3 to 15 nm. The wall thickness of the nanotubes varied from 14 to 17 nm. It is established that photocatalysts with Au, Pd, Pt produce acetaldehyde during complete ethanol decomposition reaction. Additionally the formation of methane occurs in the TiO₂ nanotubes with Pd and Au nanoparticles. We obtained firstly the multifunctional TiO₂ nanotubes modified with Pd and Au nanoparticles for use both in air purification and in the production of hydrocarbon fuel precursors.

CoFe₂O₄-PES photocatalytic membranes were assessed for Naproxen degradation in water. The degradation obeyed first-order reaction kinetics (K_app: 1.25 × 10⁻³ min⁻¹ - 3.90 × 10⁻³ min⁻¹). Surface roughness altered the collision dynamics of reactive species. It enhanced the chances of successful collision between Naproxen and reactive radicals. Membrane hydrophilicity improved the generation of reactive radicals by minimizing the blockage of active sites. Intermediates detected by Quadrupole Time-of-Flight Mass Spectrometry showed that Naproxen degraded via demethylation, hydroxylation, and ring-opening reactions. Leaching studies investigated the stability of the prepared membranes. CoFe₂O₄-PES membranes can be used in advanced oxidation technologies for water treatment.

Photocatalysis emerged as a promising alternative to address fossil fuel scarcity and the limitations of other clean energy sources. Photocatalysis enables hydrogen production via water splitting, using photocatalysts and light irradiation, which can be stored and utilized across various applications. Photocatalysis has exhibited significant improvements and promising yields in hydrogen production, surpassing its initial stages. The current photocatalyst market offers diverse materials with unique characteristics, and continuous evolution is observed in their synthesis methods. This contribution aims to compile recent literature on advancements in photocatalysts for hydrogen production, with particular emphasis on photocatalyst type, hydrogen production performance and market trends.

Catalytic valorization of biomass into high energy density fuels plays a vital role in order to achieve future carbon neutrality. Herein, a class of H-MZ-5 catalysts with different mesoporous pore structures and acid site properties were synthesized. Among them, HMZ-5 prepared with tetrapropylammonium bromide (TPABr) and hexadecyltrimethylammonium bromide (CTAB) as templating agents showed the most excellent catalytic activity and selectivity of α-pinene dimerization. Under optimal catalytic conditions, 100% α-pinene was converted with 89.6% selectivity to dimers. The efficient catalytic activity and affordability of the catalysts in this system make it promising for industrial applications.

The manuscript covers Vanadium Pentoxide Gas Sensors: Elemental Doping Strategies and Sensing Performance Impact. In this paper, we discuss elemental doping ways to improve gas sensing performance in V₂O₅ sensors. The sensing characteristics of V₂O₅ are influenced by dopants such as transition metals, rare earth elements, and non-metals. We investigate the processes behind doping-induced enhancements in sensitivity, selectivity, response time, and stability. Additionally, we explore elemental doping issues and constraints, such as precise process control, crystal structural alterations, and dopant concentration implications on sensing characteristics. This study demonstrates the possibility of elemental doping for modifying gas detecting capabilities in V₂O₅ sensors for various applications.