Advances in porous and nanoscale catalysts for viable biomass conversion

Solid catalysts with unique porosity and nanoscale properties play a promising role for efficient valorization of biomass into sustainable advanced fuels and chemicals.

Insight into the H2S selective catalytic oxidation performance on well-mixed Ce-containing rare earth catalysts derived from MgAlCe layered double hydroxides

A series of well-mixed Ce-containing MgAlCe rare earth catalysts derived from layered double hydroxides were synthesized and tested for H₂S selective catalytic oxidation. Particularly, no chemisorption O-vacancies but intrinsic defect sites were present on catalyst surface. Significantly, the catalysts exhibited excellent catalytic activity, reasonable durability, and outstanding sulfur selectivity (100%) at relatively low temperatures. Furthermore, the catalyst followed a step-wise mechanism, and the catalyst deactivation was due mainly to the slower oxidation rate of Ce³⁺ to Ce⁴⁺ by O₂ as compared to the reduction rate of Ce⁴⁺ to Ce³⁺ by H₂S. Particularly, the added water, a Lewis base, can compete with inefficient S₈ catalyst for the occupation of Lewis acid sites and active sites. Meanwhile, it can change the characteristics of catalyst surface, resulting in sulfur existing form transforming from inefficient S₈ catalyst to inactive S₃. Thus, lead to a decrease of deposited inefficient S₈ catalyst content. Consequently, decrease the catalytic activity.

Promoting effects of MgO, (NH4)2SO4or MoO3modification in oxidative esterification of methacrolein over Au/Ce0.6Zr0.4O2-based catalysts

The MgO, (NH₄)₂SO₄or MoO₃-modified Au/Ce_0.6Zr_0.4O₂catalysts presented better catalytic performance in the oxidative esterification of MAL to MMA and the active oxygen species assigned to low-temperature reduction played a significant role.

A Study on Spectro-Analytical Aspects, DNA - Interaction, Photo-Cleavage, Radical Scavenging, Cytotoxic Activities, Antibacterial and Docking Properties of 3 - (1 - (6 - methoxybenzo [d] thiazol - 2 - ylimino) ethyl) - 6 - methyl - 3H - pyran - 2, 4 - dione and its Metal Complexes

The focus of the present work is on the design, synthesis, characterization, DNA-interaction, photo-cleavage, radical scavenging, in-vitro cytotoxicity, antimicrobial, docking and kinetic studies of Cu (II), Cd (II), Ce (IV) and Zr (IV) metal complexes of an imine derivative, 3 - (1 - (6 - methoxybenzo [d] thiazol - 2 - ylimino) ethyl) - 6 - methyl - 3H - pyran - 2, 4 - dione. The investigation of metal ligand interactions for the determination of composition of metal complexes, corresponding kinetic studies and antioxidant activity in solution was carried out by spectrophotometric methods. The synthesized metal complexes were characterized by EDX analysis, Mass, IR, (1)H-NMR, (13)C-NMR and UV-Visible spectra. DNA binding studies of metal complexes with Calf thymus (CT) DNA were carried out at room temperature by employing UV-Vis electron absorption, fluorescence emission and viscosity measurement techniques. The results revealed that these complexes interact with DNA through intercalation. The results of in vitro antibacterial studies showed the enhanced activity of chelating agent in metal chelated form and thus inferring scope for further development of new therapeutic drugs. Cell viability experiments indicated that all complexes showed significant dose dependent cytotoxicity in selected cell lines. The molecular modeling and docking studies were carried out with energy minimized structures of metal complexes to identify the receptor to metal interactions.

Highly efficient cerium dioxide nanocube-based catalysts for low temperature diesel soot oxidation: the cooperative effect of cerium- and cobalt-oxides

Co₃O₄ promoted CeO₂ nanocubes exhibit a remarkable catalytic activity for soot oxidation, attributed to the superior reducible nature of CeO₂ and the preferential exposure of CeO₂ (100) and Co₃O₄ (110) facets.

Preparation of P(St-co-MAA)/CeO2 composite microspheres via surface carboxyl oxidation followed by in situ chemical deposition of CeO2 and their catalytic application on oxidative degradation of methyl orange

P(St-co-MAA)/CeO₂ composites microspheres were fabricated by a novel and facile approach, exhibiting excellent catalytic performance in oxidative degradation.

Physicochemical characterization and catalytic CO oxidation performance of nanocrystalline Ce–Fe mixed oxides

Fe-doped CeO₂ nano-oxide exhibited superior CO oxidation activity compared to pristine CeO₂ due to its facile reducible nature, enhanced lattice strain, and ample oxygen vacancies.

Promising ceria–samaria-based nano-oxides for low temperature soot oxidation: a combined study of structure–activity properties

Nanostructured Ce–Sm mixed oxides are promising catalysts for diesel soot oxidation through facile active oxygen participation.

Structural evaluation and catalytic performance of nano-Au supported on nanocrystalline Ce0.9Fe0.1O2−δ solid solution for oxidation of carbon monoxide and benzylamine

Nano-Au supported on nanocrystalline Ce_0.9Fe_0.1O_2−δ solid solution was found to show excellent catalytic performance for both CO oxidation and benzylamine oxidation.

An efficient noble metal-free Ce–Sm/SiO2 nano-oxide catalyst for oxidation of benzylamines under ecofriendly conditions

Nanosized Ce–Sm/SiO₂ mixed oxide is an efficient reusable noble metal-free catalyst for aerobic oxidation of benzylamines.