Theoretical design and synthesis of CoNi/CC for high selective methanol oxidation assisted energy-saving hydrogen production.

The integration of methanol oxidation reaction (MOR) with hydrogen evolution reaction (HER) represents an advanced approach to hydrogen production technology. Nonetheless, the rational design and synthesis of bifunctional catalysts for both MOR and HER with exceptional activity, stability and selectivity present formidable challenges. In this work, firstly, density functional theory (DFT) was utilized to design and evaluate material models with high performance for both MOR and HER.

Trimetallic Ni-CuCoN Ohmic junction for the enhanced oxidation of methanol and urea.

Methanol oxidation reaction (MOR) and urea oxidation reaction (UOR) can be utilized as effective alternatives to the anodic oxygen evolution reaction (OER) in overall water-splitting. Nevertheless, the development of cost-effective, highly efficient and durable electrocatalysts for MOR and UOR remains a significant challenge. Herein, the Ohmic junction (Ni-CuCoN@CC) comprising CuCoN nanosheets and Ni nanoparticles anchored on carbon cloth (CC) was successfully synthesized via a two-step hydrothermal process followed by pyrolysis.

Defect-engineered indium-organic framework displays the higher CO adsorption and more excellent catalytic performance on the cycloaddition of CO with epoxides under mild conditions.

In order to achieve the high adsorption and catalytic performance of CO, the direct self-assembly of robust defect-engineered MOFs is a scarcely reported and challenging proposition. Herein, a highly robust nanoporous indium(III)-organic framework of {[In(CPPDA)(HO)](NO)·2DMF·3HO} (NUC-107) consisting of two kinds of inorganic units of chain-shaped [In(COO)(HO)] and watery binuclear [In(COO)(HO)] was generated by regulating the growth environment. It is worth mentioning that [In(COO)(HO)] is very rare in terms of its richer associated water molecules, implying that defect-enriched metal ions in the activated host framework can serve as strong Lewis acid.

Robust {Pb}-Cluster-Based Metal-Organic Framework for Capturing and Converting CO into Cyclic Carbonates under Mild Conditions.

Developing a highly active catalyst that can efficiently capture and convert carbon dioxide (CO) into high-value-added energy materials remains a severe challenge, which inspires us to explore effective metal-organic frameworks (MOFs) with high chemical stability and high-density active sites. Herein, we report a robust 3D lead(II)-organic framework of {(MeNH)[Pb(PTTPA)(HO)]·2DMF·3HO} () with unreported [Pb(COO)(HO)] clusters (abbreviated as {Pb}) as nodes (HPTTPA = 4,4',4″-(pyridine-2,4,6-triyl)triisophthalic acid). After thermal activation, is functionalized by the multifarious symbiotic acid-base active sites of open Pb sites and uncoordinated pyridine groups on the inner surface of the void volume.

Confining Polymer Electrolyte in MOF for Safe and High-Performance All-Solid-State Sodium Metal Batteries.

Nanoconfined polymer molecules exhibit profound transformations in their properties and behaviors. Here, we present the synthesis of a polymer-in-MOF single ion conducting solid polymer electrolyte, where polymer segments are partially confined within nanopores ZIF-8 particles through Lewis acid-base interactions for solid-state sodium-metal batteries (SSMBs). The unique nanoconfinement effectively weakens Na ion coordination with the anions, facilitating the Na ion dissociation from salt.

Enhancing CO/N and CH/N separation performance by salt-modified aluminum-based metal-organic frameworks.

The energy-saving separation of CO/N and CH/N in the energy industry facilitates the reduction of greenhouse gas emissions and replenishes energy resources, but is a challenging separation process. The trade-off between adsorption capacity and selectivity of the adsorbents is one of the key bottlenecks in adsorption separation technologies' large-scale application in the above separation task. Herein, we introduced a series of fluoroborate or fluorosilicate salts (Cu(BF), Zn(BF) and ZnSiF) into the open coordination nitrogen sites of aluminum-based metal-organic frameworks (MOF-253) to create multiple binding sites to simultaneously enhance the adsorption capacity and selectivity for the target gas.

Nanoporous {Co}-Organic framework for efficiently seperating gases and catalyzing cycloaddition of epoxides with CO and Knoevenagel condensation.

Enhancing the catalysis of metal-organic frameworks (MOFs) by regulating inherent Lewis acid-base sites to realize the efficient seperation and chemical fixation of inert carbon dioxide (CO) is crucial but challenging. Herein, the solvothermal self-assembly of Co, 5'-(4-carboxy-2-nitrophenyl)-2,2',2'',4',6'-pentanitro-[1,1':3',1''-terphenyl]-4,4''-dicarboxylic acid (HTNBTB) and 4'-phenyl-4,2':6',4''-terpyridine (PTP) generated a highly robust cobalt-organic framework of {[Co(TNBTB)(PTP)]·7DMF·6HO} (NUC-82). In NUC-82, the tri-core clusters of {Co} with linear shape are bridged by TNBTB to form two-dimensional structure in ac plane, which is further linked by PTP to generate a three-dimensional framework with two kinds of solvent-accessible channels: rhombic-like (ca.

A disposable and sensitive sensor based on a ZIF-8@graphene modified carbon paper electrode for the quantitative determination of luteolin.

Rapid and accurate determination of luteolin is of great significance for pharmaceutical quality control. Herein, a disposable and sensitive luteolin sensor was fabricated by a hydrothermal method with carbon paper as substrate where ZIF-8 grew on GR . Notably, the large specific surface area of ZIF-8 provided active sites on the electrode surface and the ability of GR to promote electron transfer greatly improved the sensitivity towards the oxidation of luteolin.

Heterometallic ZnHoMOF as a Dual-Responsive Luminescence Sensor for Efficient Detection of Hippuric Acid Biomarker and Nitrofuran Antibiotics.

Developing efficient and sensitive MOF-based luminescence sensors for bioactive molecule detection is of great significance and remains a challenge. Benefiting from favorable chemical and thermal stability, as well as excellent luminescence performance, a porous Zn(II)Ho(III) heterometallic-organic framework (ZnHoMOF) was selected here as a bifunctional luminescence sensor for the early diagnosis of a toluene exposure biomarker of hippuric acid (HA) through "turn-on" luminescence enhancing response and the daily monitoring of NFT/NFZ antibiotics through "turn-off" quenching effects in aqueous media with high sensitivity, acceptable selectivity, good anti-interference, exceptional recyclability performance, and low detection limits (LODs) of 0.7 ppm for HA, 0.

Highly stable lanthanide(III) metal-organic frameworks as ratiometric fluorescence sensors for vitamin B.

Three lanthanide(III)-based metal-organic frameworks, formulated as [(CH)NH][Ln(μ-OH)(EBTC)(HO)]·4HO·2DMF (Ln = Eu (1), Tb (2) and Ce (3)), were synthesized using a rigid tetracarboxylate organic ligand (1,1'-ethynebenzene-3,3',5,5'-tetracarboxylic acid, H4EBTC). Complexes 1-3 possess 12-connected hexanuclear [Ln(μ-OH)(OOC-)(HO)] clusters with the topology, which were stable in water and acid/alkaline aqueous solution. Due to the antenna effect, complexes 1 and 2 presented double fluorescence emission peaks, which are the characteristic emission peaks of Ln ions and the ligand H4EBTC, respectively.

Heterostructured Mo and Co-based phosphides as high-performance bifunctional electrocatalysts for overall water splitting.

Transitional metal phosphides are efficient and durable electrocatalysts for water splitting. In this work, Mo-CoP/CoP/NF heterostructures are reported to exhibit bifunctional electrocatalyst properties in various electrolytes. The Co phosphides were found to be possessing a hydrogenase-like structure in these heterostructures with P as the proton-acceptor site and Co as the hydride-acceptor site, making them highly active during the HER process.

Efficient separation of CO from CH and N in an ultra-stable microporous metal-organic framework.

The efficient separation of CO from CH and N is essential for the upgrading of biogas and reducing carbon emissions in flue gas, but is challenging in the energy industry. Developing ultra-stable adsorbents with high CO adsorption performance in adsorption separation technology is deemed an effective solution for the separation of CO/CH and CO/N. Herein, we report an ultra-stable yttrium-based microporous metal-organic framework (Y-bptc) used for the efficient separation of CO/CH and CO/N.

construction of WNiM-WNi LDH (M = Se, S, or P) with heterostructure as highly efficient electrocatalyst for overall water splitting and urea oxidation reaction.

Electrochemical water splitting as an important means of obtaining high purity hydrogen fuel has attracted great interest. In this study, the structural engineering of complex WNiM-WNi LDH (M = Se, S, or P) was firstly developed by growth on Ni foam for use in overall water splitting and the urea oxidation reaction. These WNiM-WNi LDH (M = Se, S, or P) catalysts exhibit outstanding electrocatalytic performance in the hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and urea oxidation reaction (UOR), respectively.

A highly robust cluster-based indium(III)-organic framework with efficient catalytic activity in cycloaddition of CO and Knoevenagel condensation.

The efficient catalytic performance displayed by MOFs is decided by an appropriate charge/radius ratio of defect metal sites, large enough solvent-accessible channels and Lewis base sites capable of polarizing substrate molecules. Herein, the solvothermal self-assembly led to a highly robust nanochannel-based framework of {[In(CPDD)(μ-OH)(DMF)(HO)]·2DMF·5HO} (NUC-66) with a 56.8% void volume, which is a combination of a tetranuclear cluster [In(μ-OH)(COO)(DMF)(HO)] (abbreviated as {In}) and a conjugated tetracyclic pentacarboxylic acid ligand of 4,4'-(4-(4-carboxyphenyl)pyridine-2,6-diyl)diisophthalic acid (HCPDD).

RhB-encapsulated metal-organic cage as a dual-emission fluorescence sensor for detection of malachite green and glycine.

RhB@ZrT-1-OH composite was constructed by introduction of Rhodamine B (RhB) into the cages of zirconium-based metal-organic cage that had two fluorescence emission peaks at 466 and 612 nm upon excitation at 327 nm. The dual-emission fluorescence sensor exhibits ultra-high sensitive detection for malachite green (MG) and glycine (Gly) in phosphate buffer solution (pH = 6.86).

Cd (II) coordination polymer as a strip based fluorescence sensor for sensing Fe ions in aqueous system.

The design and construction of a sensor that can sensitively and conveniently recognize metal ions are essential for the treatment of industrial wastewater. In this work, {[Cd(HL)(pyp)(HO)]·2HO·1.5Diox} (1) was synthesized under solvothermal condition and presented a 2D 3,5-connected layered network with the point symbol of {3.

Nanochannel {InZn}-Organic Framework with a High Catalytic Performance on CO Chemical Fixation and Deacetalization-Knoevenagel Condensation.

The rare combination of In 5p and Zn 3d in the presence of a structure-oriented TDP ligand led to a robust hybrid material of {(MeNH)[InZn(TDP)(OH)]·4DMF·4HO} () with the interlaced hierarchical nanochannels (hexagonal and cylindrical) shaped by six rows of undocumented [InZn(CO)(OH)] clusters, which represented the first 5p-3d nanochannel-based heterometallic metal-organic framework. With respect to the multifarious symbiotic Lewis acid-base and Brønsted acid sites in the high porous framework, the catalytic performance of activated upon CO cycloaddition with styrene oxide was evaluated under solvent-free conditions with 1 atm of CO pressure, which exhibited that the reaction could be well completed at ambient temperature within 48 h or at 60 °C within 4 h with high yield and selectivity. Moreover, because of the acidic function of metal sites and a central free pyridine in the TDP ligand, deacetalization-Knoevenagel condensation of acetals and malononitrile could be efficiently facilitated by an activated sample of under lukewarm conditions.

Template-Induced {Mn}-Organic Framework with Lewis Acid-Base Canals as a Highly Efficient Heterogeneous Catalyst for Chemical Fixation of CO and Knoevenagel Condensation.

The target for the self-assembly of functional microporous metal-organic frameworks (MOFs) could be realized by employing ligand-directed and/or template-induced strategies, which prompted us to explore the synthetic technique of d secondary-building-unit-based nanoporous frameworks. Here, the exquisite combination of a paddle-wheel [Mn(CO)(OH)] cluster and a TDP ligand contributes one robust honeycomb framework of {(MeNH)[Mn(TDP)(HO)]·3HO·3DMF} (; DMF = ,-dimethylformamide), whose activated state with the removal of associated aqueous molecules characterizes the outstanding physicochemical properties of nanochannels, penta- and tetracoordinated Mn serving as highly open metal sites, rich Lewis base sites (rows of C═O groups and N atoms), and excellent thermal stability. Moreover, it is worth mentioning that Lewis acid-base sites on the inner surface of the channels in activated successfully form one unprecedented canal-shaped acid-base confined space with evenly distributed open metal sites of Mn and N atoms as the canal bottom as well as two rows of C═O groups serving as dyke dams.

V═O Functionalized {Tm}-Organic Framework Designed by Postsynthesis Modification for Catalytic Chemical Fixation of CO and Oxidation of Mustard Gas.

In terms of recently documented references, the introduction of V═O units into porous MOF/COF frameworks can greatly improve their original performance and expand their application prospects due to a change in their electronegativity. In this work, by a cation-exchange strategy, a consummate combination of separate 4f [Tm(CO)] SBUs and 3d [VO(HO)] units generated the functionalized porous metal-organic framework {(MeNH)[VO(HO)][Tm(BDCP)]·3DMF·3HO} (), in which [Tm(CO)] SBUs constitute the fundamental 3D host framework of {[Tm](BDCP)} along with [VO(HO)] units being further docked on the inner wall of channels by covalent bonds. Significantly, represents the first example of V═O modified porous MOFs, in which uncoordinated carboxylic groups (-COH) further grasp the functional [VO(HO)] units on the initial basic skeleton along with the formation of covalent bonds as fixed ropes.

6s-3d {BaZn}-Organic Framework as an Effective Heterogeneous Catalyst for Chemical Fixation of CO and Knoevenagel Condensation Reaction.

The exquisite combination of Ba and Zn with the aid of 2,4,6-tri(2,4-dicarboxyphenyl)pyridine (HTDP) under the condition of solvothermal self-assembly generates one highly robust [BaZn(CO)(HCO)(OH)]-organic framework of {[BaZn(TDP)(HCO)(OH)]·7DMF·4HO} (), in which adjacent 2D layers are interlaced via hydrogen-bonding interactions to form a 3D skeleton with peapod-like channels and nano-caged voids. It is worth emphasizing that both Ba and Zn ions in display the extremely low coordination modes: hexa-coordinated [Ba(1)] and tetra-coordinated [Ba(2), Zn(1), and Zn(2)]. Furthermore, to the best our knowledge, is one scarcely reported 2D-based nanomaterial with an unprecedented Z-shaped hepta-nuclear heterometallic cluster of [BaZn(CO)(HCO)(OH)] as SBUs, which not only has plentiful low-coordinated open metal sites but also has the excellent physicochemical properties including omni-directional opening pores, ultrahigh porosity, larger specific surface area, and the coexistence of Lewis acid-base sites.

Reversible filtration redox of methylene blue in dimethylsulfoxide by manganese oxide loaded carbonaceous nanofibrous membrane through Fenton-like oxidation.

The reversible redox of methylene blue in organic solvents was highly attractive, yet was rarely reported. In this study, we realized the continuous filtration redox of methylene blue (MB) in dimethylsulfoxide (DMSO) through Fenton-like oxidization by using MnO loaded carbonaceous nanofibrous membrane (cPAN-MnO). The carbonaceous nanofibrous membrane (cPAN) was fabricated through electrospun of polyacrylonitrile and subsequent carbonization.

One Robust Microporous Tm-Organic Framework for Highly Catalytic Activity on Chemical CO Fixation and Knoevenagel Condensation.

In terms of documented references, multifunctional MOFs with high catalytic performance could be constructed from the combination of metal cations and polycarboxyl-pyridine ligands, which could efficiently endow crystallized porous frameworks with the coexisting Lewis acid-base properties. Thus, by employing a ligand-directed synthetic strategy, the exquisite combination of wave-like inorganic chains of [Tm(CO)(OH)] and mononuclear units of [Tm(CO)(OH)] with the aid of the specially designed ligand of 2,6-bis(2,4-dicarboxylphenyl)-4-(4-carboxylphenyl)pyridine (HBDCP) generates one highly robust microporous framework of {(MeNH)[Tm(BDCP))(HO)]·4DMF·HO} (simplified as ), which contains near-rectangular nanochannels and large solvent-residing voids. Furthermore, the activated state of with the removal of associated water molecules is a rarely reported bifunctional heterogeneous catalyst due to the coexistence of Lewis acid-base sites including 6-coordinated Tm ions, uncoordinated carboxyl oxygen atoms, and N atoms.

Nickel nanocrystal/nitrogen-doped carbon composites as efficient and carbon monoxide-resistant electrocatalysts for methanol oxidation reactions.

High-performance electrocatalysts for the methanol oxidation reaction (MOR) are the key to advance the application of direct methanol fuel cells. Pt-Based electrocatalysts for the MOR are limited due to their high cost, low stability and poor resistance to carbon monoxide (CO) poisoning. The development of non-noble metal-based electrocatalysts for the MOR with high activity and good stability is desired, but it remains a challenge.

A cobalt(ii) chain based on pymca generated from the hydrolysis of 2-cyanopyrimidine: spin canting and magnetic relaxation.

A one-dimensional (1D) coordination polymer, [{Co(pymca)·(HO)}SO·2HO] (1) (pymca = 2-carboxypyrimidine), was solvothermally synthesized the reaction of 2-cyanopyrimidine and Co(SCN). A bidentate pymca ligand was formed by the hydrolysis of 2-cyanopyrimidine. Furthermore, in this study, the magnetic properties of complex 1 were investigated in detail.

Novel ionic surface imprinting technology: design and application for selectively recognizing heavy metal ions.

Traditional bulk polymerization imprinted technology and existing surface imprinted technology have some congenital defects. Therefore, it is necessary to design more efficient surface imprinted technology. In this paper, novel surface imprinting technology with higher imprinting efficiency is well designed.