Abstract Widespread access to greener energy is required in order mitigate the effects of climate change. A significant barrier cleaner natural gas usage lies safety/efficiency limitations storage technology. Despite highly porous metal-organic frameworks (MOFs) demonstrating record-breaking gas-storage capacities, their conventionally powdered morphology renders them non-viable. Traditional powder shaping utilising high pressure or chemical binders collapses porosity creates low-density...

The energy crisis caused by the incessant growth in global demand joint to its associated greenhouse emissions motivates urgent need control and mitigate atmospheric CO2 levels. Leveraging as carbon pool produce value-added products represents a cornerstone of circular economy. Among utilization strategies, electrochemical reduction conversion fuels chemicals is booming due versatility end-product flexibility. Herein most studies focused on C1 although C2 C2+ compounds are chemically...

Integrating metal–organic frameworks (MOFs) into microfabrication processes will benefit from controlled vapor-phase deposition techniques. This study presents a molecular layer method that enables area-selective and oriented growth of zeolitic imidazolate framework-8 (ZIF-8) films. Substrates functionalized with self-assembled monolayers (SAMs) different end groups (alkyl, phenyl, hydroxyl, carboxyl, amine, imidazole) allow tuning the degree crystallographic orientation in resulting MOF...

Novel MOF-based polymer nanocomposite films were successfully prepared using Zr-based UiO-67 as a metal-organic framework (MOF) and polyurethane (PU) polymeric matrix. Synchrotron X-ray powder diffraction (SXRPD) analysis confirms the improved stability of embedded nanocrystals scanning electron microscopy images confirm their homogeneous distribution (average crystal size ~100-200 nm) within 50-um thick film. Accessibility to inner porous structure MOFs was completely suppressed for N2 at...

Metal–organic frameworks (MOFs) have been evaluated as potential nanocarriers for intraocular incorporation of brimonidine tartrate to treat chronic glaucoma. Experimental results show that UiO-67 and MIL-100 (Fe) exhibit the highest loading capacity with values up 50–60 wt %, whereas performance is quite limited MOFs narrow cavities (below 0.8 nm, example, UiO-66 HKUST-1). The large in accompanied by an irreversible structural amorphization aqueous physiological media promotes extended...

The rapid increase in the concentration of atmospheric carbon dioxide is one most pressing problems facing our planet.

This study presents an integrated approach combining aqueous phase reforming (APR) and hydrodeoxygenation (HDO) for the hydrotreatment of guaiacol, a model compound representing lignin-derived phenols in pyrolysis bio-oils. The APR process enables in-situ H2 generation, eliminating need external hydrogen source. We examine interplay between metal species, Pt-promoting effect on Ni–Pt catalyst supported activated carbon (AC), choice source (methanol or glycerol). Amongst monometallic...

Reverse water gas shift (RWGS) competes with methanation as a direct pathway in the CO2 recycling route, being dominant process low-temperature window and RWGS at higher temperatures. This work showcases design of multi-component catalysts for full-temperature-range behavior by suppressing reaction low The addition alkali promoters (Na, K, Cs) to reference Ni/CeO2 catalyst allows identifying clear trend activation promotion both low- high-temperature ranges. Our characterization data...

Dry reforming of methane is a very appealing catalytic route biogas (mainly composed by greenhouse gases: carbon dioxide and methane) conversion into added value syngas, which could be further upgraded to produce liquid fuels chemicals. However, the major culprits this reaction are coking active phase sintering that result in catalysts deactivation. Herein we have developed highly stable bimetallic Ni–Rh catalyst supported on mixed CeO2–Al2O3 oxide using low-noble metal loadings. The...

The increasing anthropogenic emissions of greenhouse gases (GHG) is encouraging extensive research in CO2 utilisation. Dry reforming methane (DRM) depicts a viable strategy to convert both and CH4 into syngas, worthwhile chemical intermediate. Among the different active phases for DRM, use nickel as catalyst economically favourable, but typically deactivates due sintering carbon deposition. stabilisation Ni at loadings cerium zirconate inorganic complex structures investigated this work...

Dense metal-organic frameworks with high spin paramagnetic nodes are competitive materials for cryogenic magnetic refrigeration, particularly in applications which local cooling is advantageous. We focus on obtaining thin films of gadolinium formate, has a large volumetric magnetocaloric effect. Continuous and homogeneous deposits formate successfully formed silicon by means aerosol jet printing, control over the film thickness from 0.35 μm up to 2.5 μm. The excellent power evidenced via...

The evaluation of the flexibility in zeolitic imidazolate frameworks (ZIFs) has been very useful to understand their performance gas adsorption and separation applications. Here, we have evaluated properties a nanoporous mixed-linker ZIF-62 using combination measurements, grand canonical Monte Carlo simulations, synchrotron X-ray powder diffraction under operando conditions. While studies at 77 K atmospheric pressure predict large O2/N2 ability, computational anticipate that observed...

Mesoporous MgO was synthesized by the nanoreplication method using CMK-3 carbon as a hard template and magnesium nitrate metal oxide precursor. The produced support modified with different amounts of ammonium metavanadate solution. Various distributions V-containing species on surface were found XRD, low-temperature adsorption N2, TEM, XPS UV–vis-DR spectroscopy. At low V loadings isolated VO4 dominated. Increasing content resulted in clustering formation Mg3V2O8 crystallites. As...

The pufferfish effect in ZIF-4: synchrotron X-ray powder diffraction studies under <italic>operando</italic> conditions confirm that ZIF-4 experiences a breathing phenomenon above ∼30 kPa associated with large expansion the unit cell volume (∼8–9%). presence of an expanded-pore (N₂) structure is predicted by molecular simulations.

A series of UiO-66 materials with different functional groups (-H, -NH2, and -NO2) have been evaluated for the adsorption release a common ocular drug such as brimonidine tartrate. samples were synthesized under solvothermal conditions activated by solvent exchange ethanol. Experimental results suggest that incorporation surface functionalities gives rise to development structural defects (missing linker defects) but without altering basic topology framework. These improve performance parent...

The exponential growth of greenhouse gas emissions and their associated climate change problems have motivated the development strategies to reduce CO2 levels via capture conversion. Reverse water shift (RWGS) reaction has been targeted as a promising pathway convert into syngas which is primary reactive in several reactions obtain high-value chemicals. Among different catalysts reported for RWGS, nickel-based catalyst proposed an alternative expensive noble metal catalyst. However, Ni-based...

Selective CO methanation from H2-rich stream has been regarded as a promising route for deep removal of low concentration and catalytic hydrogen purification processes. This work is focused on the development more efficient catalysts applied in practical conditions. For this purpose, we prepared series based Ru supported over titania promoted with small amounts Rh Pt. Characterization details revealed that Pt modify electronic properties Ru. The results activity showed negative effect since...

Humins are a by-product of many acid-catalyzed biorefinery processes converting polysaccharides into platform chemicals. The valorization humin residue to increase the profit operations and reduce waste is field that growing interest as production humins continues increase. This includes their in materials science. For successful processing humin-based materials, this study aims understand thermal polymerization mechanisms from rheological perspective. Thermal crosslinking raw leads an...

In this work, we investigate the vapor-assisted synthesis of metal-organic framework MOF-74 starting from three metal oxides (ZnO, CoO, and MgO). Depending on nature added vapor (H2O, DMF, DMSO), oxide, temperature, outcome reaction can be directed towards desired porous phase. Ex situ in XRD measurements reveal formation an intermediate phase during MgO with H4dobdc, while forms directly for ZnO CoO. The reduced CO2 uptake resulting materials compared to solvothermally prepared MOFs might...

Continuous and homogenous films of gadolinium formate formed by spin-coating on bare Si possess unprecedentedly high surface magnetic cooling power.