A "Dual Spatial Confinement" Route to Tailor Efficient Dual-Active Sites ORR Catalyst for Rechargeable Zn-Air Batteries.

Dual active center catalysts (DACs) are effective for accelerating the sluggish kinetics of cathodic oxygen reduction reaction (ORR) in rechargeable zinc-air batteries (ZABs). However, their tendency to aggregate severely restrict the catalytic efficiency. Herein, a "dual spatial confinement" route is conceived to develop a family of well-dispersed DACs for boosting ORR activity and ZABs.

A "Pre-Division Metal Clusters" Strategy to Mediate Efficient Dual-Active Sites ORR Catalyst for Ultralong Rechargeable Zn-Air Battery.

To conquer the bottleneck of sluggish kinetics in cathodic oxygen reduction reaction (ORR) of metal-air batteries, catalysts with dual-active centers have stood out. Here, a "pre-division metal clusters" strategy is firstly conceived to fabricate a N,S-dual doped honeycomb-like carbon matrix inlaid with CoN sites and wrapped Co P nanoclusters as dual-active centers (Co P/CoN @NSC-500). A crystalline {Co } coordination cluster divided by periphery second organic layers is well-designed to realize delocalized dispersion before calcination.

Interpenetrated N-rich MOF derived vesicular N-doped carbon for high performance lithium ion battery.

High-performance lithium ion batteries (LIBs) juggling high reversible capacity, excellent rate capability and ultralong cycle stability are urgently needed for all electronic devices. Here we report employing a vesicle-like porous N-doped carbon material (abbr. N/C-900) as a highly active anode for LIBs to balance high capacity, high rate and long life.

Hierarchical Fe-Mn binary metal oxide core-shell nano-polyhedron as a bifunctional electrocatalyst for efficient water splitting.

Electrochemical water splitting is convinced as one of the most promising solutions to combat the energy crisis. The exploitation of efficient hydrogen and oxygen evolution reaction (HER/OER) bifunctional electrocatalysts is undoubtedly a vital spark yet challenging for imperative green sustainable energy. Herein, through introducing a simple pH regulated redox reaction into a tractable hydrothermal procedure, a hierarchical FeO@MnO binary metal oxide core-shell nano-polyhedron was designed by evolving MnO wrapped FeO.

A Co-MOF-derived CoS@NS-C electrocatalyst for efficient hydrogen evolution reaction.

The exploitation of efficient hydrogen evolution reaction (HER) electrocatalysts has become increasingly urgent and imperative; however, it is also challenging for high-performance sustainable clean energy applications. Herein, novel CoS nanoparticles embedded in a porous N,S-dual doped carbon composite (abbr. CoS@NS-C-900) were fabricated by the pyrolysis of a single crystal Co-MOF assisted with thiourea.

Nanocage-Based N-Rich Metal-Organic Framework for Luminescence Sensing toward Fe and Cu Ions.

Luminescent metal-organic frameworks (LMOFs) as sensors showing highly efficient detection toward toxic heavy-metal ions are in high demand for human health and environmental protection. A novel nanocage-based N-rich LMOF () has been constructed and characterized. It is a 2-fold interpenetrating structure built from N-rich {Zn(dttz)} nanocages extended by N-donor ligand Hdpa [Hdttz = 4,5-di(1-tetrazol-5-yl)-2-1,2,3-triazole; Hdpa = 4,4'-dipyridylamine].

Fe-MOF-Derived Efficient ORR/OER Bifunctional Electrocatalyst for Rechargeable Zinc-Air Batteries.

The construction of an efficient oxygen reduction reaction and oxygen evolution reaction (ORR/OER) bifunctional electrocatalyst is of great significance but still remains a giant challenge for high-performance metal-air batteries. In this study, uniform FeS/FeC nanoparticles embedded in a porous N,S-dual doped carbon honeycomb-like composite ( FeS/FeC@NS-C-900) have been conveniently fabricated by pyrolysis of a single-crystal , which has a low potential gap Δ of ca. 0.

Structural Diversity of Copper(I) Cluster-Based Coordination Polymers with Pyrazine-2-thiol Ligand.

Six novel copper(I) cluster-based coordination polymers (CPs) [Cu(pzt)Cl] (), [Cu(pzt)Cl] (), [Cu(pzt)Br] (), [Cu(pzt)] (), [Cu(pzt)I] (), and [Cu(pzt)I] () were solvothermally synthesized using Hpzt (Hpzt = pyrazine-2-thiol) ligand and well-characterized by elemental analysis, infrared (IR) spectroscopy, powder X-ray diffraction (PXRD), and single-crystal X-ray diffraction (SCXRD). Six CPs exhibit either 2D ( and ) or 3D (-, and ) network based on diverse multinuclear {CuS} clusters. The structural evolutions of - are greatly influenced by types of metal halides and the ligand-to-metal molar ratio used in the reaction.

A dinuclear cobalt cluster as electrocatalyst for oxygen reduction reaction.

Dinuclear metal clusters as metalloenzymes execute efficient catalytic activities in biological systems. Enlightened by this, a dinuclear {Co } cluster was selected to survey its ORR (Oxygen Reduction Reaction) catalytic activities. The crystalline {Co } possesses defined structure and potential catalytic active centers of {CoNO} sites, which was identified by X-ray single crystal diffraction, Raman and XPS.

Two microporous Co-MOFs with dual active sites for highly selective adsorption of CO/CH and CO/N.

Simultaneously involving abundant [NH2(CH3)2]+ cations and uncoordinated carboxylate oxygen atoms as dual active sites, two microporous CoII-MOFs (LCU-105 and LCU-106, LCU = Liaocheng University) both exhibit highly selective adsorption of CO2/CH4 and CO2/N2. GCMC theoretical simulations provide good verification of the experimental results.

Nanocage-Based Porous Metal-Organic Frameworks Constructed from Icosahedrons and Tetrahedrons for Selective Gas Adsorption.

Two isostructural nanocage-based porous Ni/Co(II)-MOFs have been hydrothermally synthesized, which were interestingly composed of icosahedron and tetrahedron cages with a new (3,8)-connected 3D topology. Moreover, the stable Ni-MOF exhibits good selective CO/CH and CO/N adsorption owing to its exposed nitrogen active sites.

Two microporous Fe-based MOFs with multiple active sites for selective gas adsorption.

Two Fe-based porous MOFs have been constructed from dimeric Fe-clusters and rod-shaped heterobimetallic {FeNa} chains as SBUs, respectively. Both of them exhibit highly selective CO adsorption over CH and N, owing to their abundant multiple active sites.

[Effect of Seasonal Temperature Increasing on Nitrogen Mineralization in Soil of the Water Level Fluctuating Zone of Three Gorge Tributary During the Dry Period].

To reveal the effect of seasonal temperature increasing on nitrogen mineralization in soil of the water level fluctuating soil zone of three gorge reservoir areas in the Yangtze river tributary during the dry period, surface soils were collected from the water level fluctuating zone of Pengxi river crossing two hydrological sections, i.e., upstream and downstream and three water level altitudes, 155 m (low), 165 m (middle) and 175 m (high).

[Spectral Characteristics and Catalytic Performances of SO2-4/Ce-TiO2 with Visible Light Response].

Ce doped TiO2 was prepared via sol-gel method. The as-prepared Ce doped TiO2 was impregnated with diluted H2SO4 to obtain a H2SO4-treated Ce doped TiO2. In succession, the characterizations of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), pyridine adsorption-FTIR (Py-FTIR), ultraviolet-visible spectroscopy (UV-vis) and X-ray photoelectron spectroscopy (XPS) were carried out to analyze the reasons for the improvement of the light response performance.

[Preparation and characterization of modified kaolins and their photocatalytic property].

In order to develop the cheap and efficient photocatalysts, kaolins were modified through calcination and acid leaching. In succession, the prepared samples were characterized using thermal gravimetric-differential thermal analysis (TG-DTA), scanning electron microscope (SEM) coupled with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-Vis) and BET specific surface area measurements (BET). Methyl orange, used as a model reactant, was degraded under UV light irradiation to evaluate the photocatalytic activities of the prepared samples.

HSulf-1 suppresses cell growth and down-regulates Hedgehog signaling in human gastric cancer cells.

Gastric cancer is the second most lethal cancer worldwide. Despite the current surgical and adjuvant therapies, 5-year survival remains less than 20-25% in the US, Europe and China. Therefore, there is an urgent need to identify new therapeutic targets for treating this malignant disease.

Use of serum circulating CCNB2 in cancer surveillance.

Cyclin B2 (CCNB2), a member of the cyclin protein family, has been found to be up-regulated in human cancers. To evaluate the potential use of circulating CCNB2 in serum in cancer surveillance, we examined relative expression levels of serum circulating CCNB2 mRNA in 103 cancer patients, 19 normal controls, and 40 benign disease patients using real-time quantitative reverse transcriptase polymerase chain reaction. We found that the relative expression level of circulating CCNB2 mRNA in cancer patients was significantly higher (p<0.

Use of serum circulating CCNB2 in cancer surveillance.

Cyclin B2 (CCNB2), a member of the cyclin protein family, has been found to be up-regulated in human cancers. To evaluate the potential use of circulating CCNB2 in serum in cancer surveillance, we examined relative expression levels of serum circulating CCNB2 mRNA in 103 cancer patients, 19 normal controls, and 40 benign disease patients using real-time quantitative reverse transcriptase polymerase chain reaction. We found that the relative expression level of circulating CCNB2 mRNA in cancer patients was significantly higher (p<0.