Porous CoFe2 O4 /C NRAs supported on nickel foam@NC (denoted as NF@NC-CoFe2 NRAs) are directly fabricated by the carbonization of bimetal-organic framework grown NF@poly-aniline(PANI), and they exhibit high electrocatalytic activity, low overpotential, stability for oxygen evolution reaction in alkaline media.

Conventional adsorbents preferentially adsorb the small, high-polarity, and unsaturated 1,3-butadiene molecule over other C4 hydrocarbons from which it must be separated. We show single-crystal x-ray diffraction computational simulation that a hydrophilic metal-organic framework, [Zn2(btm)2], where H2btm is bis(5-methyl-1H-1,2,4-triazol-3-yl)methane, has quasi-discrete pores can induce conformational changes in flexible guest molecules, weakening adsorption through large bending energy...

Abstract Separating ethene (C 2 H 4 ) from ethane 6 is of paramount importance and difficulty. Here we show that C can be efficiently purified by trapping the inert in a judiciously designed metal-organic framework. Under ambient conditions, passing typical cracked gas mixture (15:1 /C through 1 litre this selective adsorbent directly produces 56 litres with 99.95%+ purity (required polymerization reactor) at outlet, single breakthrough operation, while other materials only produce ca . ⩽...

Postsynthetic ion exchange of [Co2(μ-Cl)2(btta)] (MAF-X27-Cl, H2bbta =1H,5H-benzo(1,2-d:4,5-d′)bistriazole) possessing open metal sites on its pore surface yields a material [Co2(μ-OH)2(bbta)] (MAF-X27-OH) functionalized by both and hydroxide ligands, giving drastically improved electrocatalytic activities for the oxygen evolution reaction (an overpotential 292 mV at 10.0 mA cm–2 in 1.0 M KOH solution). Isotope tracing experiments further confirm that ligands are involved OER process to...

The paddle-wheel type cluster Co2(RCOO)4(LT)2 (R = substituent group, LT terminal ligand), possessing unusual metal coordination geometry compared with other cobalt compounds, may display high catalytic activity but is highly unstable especially in water. Here, we show that judicious considerations of the host/guest geometries and modular synthetic strategies, labile dicobalt clusters can be immobilized stabilized a metal-organic framework (MOF) as coordinative guests. Fe(na)4(LT) fragment...

Conversion from CO2 to C2H4 is important for the development of energy and environment, but high barrier hydrogenation *CO intermediate C–C coupling step tend result in C1 compounds as main product thus restrict generation C2H4. Here, we report a metal–organic framework (denoted PcCu-Cu-O), composed 2,3,9,10,16,17,23,24-octahydroxyphthalo-cyaninato)copper(II) (PcCu-(OH)8) ligands square-planar CuO4 nodes, electrocatalyst Compared with discrete molecular copper-phthalocyanine (Faradaic...

Converting CO2 into fuels via photochemical reactions relies on highly efficient and selective catalysts. We demonstrate that the catalytic active metal center can cooperate with neighboring hydroxide ligands to boost photocatalytic reduction. Six cobalt-based metal–organic frameworks (MOFs) different coordination environments are studied at same reaction condition (photosensitizer, electron donor, water/organic mixed solvent, visible light). In pure 1.0 atm, MOFs bearing μ-OH– open Co...

Framework flexibility is one of the most important characteristics metal–organic frameworks (MOFs), which not only interesting, but also useful for a variety applications. Designing, tailoring or controlling framework MOFs much more difficult than static structural features such as topology and pore size/shape. Nevertheless, with in-depth understanding relationship between host structure, guest loading other aspects crystal size/morphology external physical environment, some strategies have...

Porous materials combining high hydrophobicity, large surface area, as well and uniform pore size are very useful but rare. The nanoporous zeolitic metal azolate framework, RHO-[Zn(eim)2] (MAF-6, Heim = 2-ethylimidazole), is an attractive candidate thought to be unobtainable/unstable. In this work, the supramolecular isomerism of [Zn(eim)2] thoroughly studied using a rapid solution mixing reaction [Zn(NH3)4](OH)2 Heim, which enables MAF-6 with crystallinity, purity, thermal/chemical...

Using a bis-triazolate ligand and tetrahedral Zn(II) ion, we synthesized flexible porous coordination polymer functionalized with pairs of uncoordinated triazolate N-donors that can be used as guest chelating sites to give very high CO2 adsorption enthalpy CO2/N2 selectivity. The dynamic sorption behavior could monitored well by single-crystal X-ray diffraction.

Reversible chemisorption of CO₂is realized by introducing monodentate hydroxide onto the pore surface metal–organic frameworks.

Hydrazine can be grafted in CPO-27-Mg/MOF-74-Mg to provide an ultrahigh concentration of amine groups on the pore surface, giving exceptionally high CO₂capture performance, especially at extremely low pressures.

Reducing CO2 into fuels via photochemical reactions relies on highly efficient photocatalytic systems. Herein, we report a new and system for reduction. Driven by electrostatic attraction, an anionic metal-organic framework Cu-HHTP (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) as host cationic photosensitizer [Ru(phen)3]2+ (phen 1,10-phenanthroline) guest were self-assembled Ru@Cu-HHTP, which showed high activity reduction under laboratory light source (CO production rate of 130(5) mmol g-1...

A lanthanide cluster, PCC-72, which is the second largest, with 72 Dy(III) ions assembled into an unprecedented tubular structure, synthesized. Remarkably, PCC-72 exhibits superionic proton conductivity (>10−4 S cm−1) under both ambient (with relative humidity RH < 75%) and hot (T > 90 °C, = 95%) conditions. Moreover, slow magnetic relaxation observed, making largest cluster that a single-molecule magnet.

Electroreduction of CO2 to acetate provides a promising strategy reduce emissions and store renewable energy, but is usually by-product. Here, we show stable conductive two-dimensional phthalocyanine-based covalent-organic framework (COF) as an electrocatalyst for reduction with single-product Faradaic efficiency (FE) 90.3(2)% at -0.8 V (vs. RHE) current density 12.5 mA cm-2 in 0.1 M KHCO3 solution. No obvious degradation was observed over 80 hours continuous operation. Combined the...

It is of great significance to reveal the influence small differences in coordination environments metal ions catalytic active centers on selectivity products electrocatalytic CO2 reduction reaction (CO2RR). Here, two types metal–organic frameworks (MOFs) based square-pyramidal CuO5 and square-planar CuO4 nodes, respectively, are compared regard their performances CO2RR. The MOF (Cu-DBC, H8DBC = dibenzo-[g,p]chrysene-2,3,6,7,10,11,14,15-octaol) constructed by nodes catechol-derived ligands...

Crystalline porous materials sustained by supramolecular interactions (e.g., π–π stacking interactions) are a type of molecular crystals showing considerable stability, but their applications rarely reported due to the high difficulty construction. Herein, stable framework formed trinuclear copper(I) compound [Cu3(HBtz)3(Btz)Cl2] (CuBtz, HBtz = benzotriazole) with pyrazolate-bridged dicopper(I) sites is and employed for electrochemical CO2 reduction, an impressive performance 73.7 ± 2.8%...

Electroreduction of CO2 to CO is a promising approach for the cycling use , while it still suffers from impractical current density and durability. Here we report single-atom nanozyme (Ni-N5 -C) that achieves industrial-scale performance -to-CO conversion with Faradaic efficiency (FE) exceeded 97 % over -0.8--2.4 V vs. RHE. The at -2.4 RHE reached maximum 1.23 A cm-2 (turnover frequency 69.7 s-1 ) an FE 99.6 %. No obvious degradation was observed 100 hours continuous operation. Compared...

Artificial photocatalytic CO2 reduction, using water as the reductant, is challenging mainly because it difficult for multiple functional units to cooperate efficiently. Here, we show that classic photosensitive and H2O-oxidizing ruthenium bipyridyl CO2-reducing cobalt imidazolate can be incorporated into a metal–organic framework organic ligand, imidazo[4,5-f][1,10]phenanthroline. Under visible light without additional sacrificial agents photosensitizers, overall conversion of H2O CO O2 was...

Conversion from CO2 to the more desirable and valuable C2+ products under neutral conditions is important for development of energy environment, but it a challenging work. In this work, we demonstrate that bi-copper sites on crystal surface metal–organic framework Cu-HITP (HITP = 2,3,6,7,10,11-hexaiminotriphenylene) are very suitable catalyzing low-energy pathway *CO coupling with *COH form *OCCOH. The in situ infrared spectroscopy, theoretic calculations, controlled experiments show...

The electroreduction of CO2 into value-added liquid fuels holds great promise for addressing global environmental and energy challenges. However, achieving highly selective yielding multi-carbon oxygenates through the electrochemical reduction reaction (eCO2RR) is a formidable task, primarily due to sluggish asymmetric C-C coupling reaction. In this study, novel metal-organic framework (CuSn-HAB) with unprecedented heterometallic Sn···Cu dual sites (namely, pair SnN2O2 CuN4 bridged by μ-N...

The electrochemical CO2 reduction reaction (eCO2RR) under acidic conditions has become a promising way to achieve high utilization because of the inhibition undesirable carbonate formation that typically occurs neutral and alkaline conditions. Herein, unprecedented highly active ditin(IV) sites were integrated into nanopores metal-organic framework, namely NU-1000-Sn, by "ship-in-a-bottle" strategy. NU-1000-Sn delivers nearly 100% formic acid Faradaic efficiency at an industry current...