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An activated carbon-supported Cu/ZnO catalyst (CCZ-AE-ox) was successfully obtained by the ammonia evaporation method for the hydrogenation of carbon dioxide to methanol, and the surface properties of the catalyst post-calcination and reduction were investigated. Activated carbon facilitated the increased dispersion of the loaded metals, which promote the CO space-time yield (STY) of methanol and turnover frequency (TOF) on the active sites. Furthermore, the factors affecting the catalyst in the hydrogenation of CO to methanol were in-depth investigated. The larger surface area and higher CO adsorption capacity are found to make possible the main attributions of the superior activity of the CCZ-AE-ox catalyst.
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http://dx.doi.org/10.1039/d3ra01502e | DOI Listing |
Arch Microbiol
September 2025
College of Bioengineering, Sichuan University of Science and Engineering, Zigong, 643000, China.
The esterase gene encoding EstJN1 of Clostridium butyricum, which was isolated from the pit cellar of Chinese liquor facility, was expressed. EstJN1 was identified as a novel GDSL esterase belonging to family II. The enzyme demonstrated a marked substrate preference for p-nitrophenyl butyrate, with optimal activity at a temperature of 40 ℃ and a pH of 7.
View Article and Find Full Text PDFDalton Trans
September 2025
Instituto de Química, Universidad Nacional Autónoma de México, Circuito Interior, CU, Ciudad de México, 04510, Mexico.
Synthesis, characterization, and electrocatalytic water oxidation studies of the cubane-type complexes [(μ-)CoCl(MeOH)] (1) and [(μ-)CoCl(MeOH)] (2) are herein reported. Cubanes 1 and 2 were obtained in high yields under mild conditions by self-assembly of the ligands = 1--2-benzimidazolylmethanol and = 1-methyl-2-benzimidazolylmethanol with CoCl·6HO in basic methanolic solution. Both compounds feature a cubane-type structure in which the central {CoO} units are built by four Co centers coordinated by alkoxide-bridged oxygen and nitrogen atoms from the deprotonated ligands and stabilized by MeOH molecules and chloride ions.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
Center for Clean Energy Technology, School of Mathematical and Physical Sciences, Faculty of Science, University of Technology Sydney, Sydney, New South Wales, 2007, Australia.
The coupling of electrocatalytic CO reduction (ECR) and methanol oxidation reaction (MOR) presents a promising strategy for simultaneous cogeneration of formic acid (FA) at both cathode and anode. However, sluggish kinetics, low selectivity and efficiency hinder practical application. Herein, we demonstrate an integrated ECR||MOR system employing CuBi cathode and NiCo anode for energy-efficient FA cogeneration.
View Article and Find Full Text PDFJ Phys Chem Lett
September 2025
State Key Laboratory of Fluorine & Nitrogen Chemicals, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
ZnZrO catalysts exhibit excellent performance in the hydrogenation of CO to methanol, yet the structural identification of active sites in the mixed oxide remains elusive. Herein, combining density functional theory calculations, large-scale machine-learning atomic simulations, and microkinetic modeling, we discovered that double-chain ZnO structures supported on monoclinic ZrO(1̅11) surfaces (ZnO-ZrO) are highly active and stable for methanol synthesis. The double-chain ZnO structure, corresponding to 50% ZnO surface coverage and featuring interconnected 8-membered rings, induces a local minimum (0.
View Article and Find Full Text PDFLangmuir
September 2025
School of Materials Science and Engineering, Sun Yat-sen University, Higher Education Megacenter, Guangzhou 510006, P. R. China.
The interface between grafted poly(-isopropylacrylamide) (PNIPAM) and fluid plays an important role in drug delivery, responsive nanomaterials, and separation technologies. However, under external shear, the transport at the interface is regulated by both the thermoresponsive behavior and grafting densities. This study combines equilibrium and nonequilibrium molecular dynamics simulations to investigate the synergistic effects of grafting density, temperature, and shear flow on the structural and dynamic properties of PNIPAM brushes in methanol-water solutions.
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