Sulfur-bridge ligands altering the microenvironment of single-atom CoNS sites to boost the oxygen reduction reaction.

We report here an asymmetric N,S-coordinated cobalt-based single-atom catalyst with sulfur (S)-bridge ligands (Co-N/S-C) for the oxygen reduction reaction (ORR). The Co-N/S-C exhibits a half-wave potential () of 0.908 V RHE, outperforming most state-of-the-art ORR catalysts.

Observation of 4-order water oxidation kinetics by time-resolved photovoltage spectroscopy.

Artificial photo-driven water oxidation has been proposed over half a century through a four-charge involved multiple-step oxygen evolution process. However, the knowledge of the intrinsic activity, such as the rate-law of the water oxidation reactions, has been inadequately studied. Up to date, the highest order reported is the third one under photoelectrochemical condition.

Metasequoia-like Nanocrystal of Iron-Doped Copper for Efficient Electrocatalytic Nitrate Reduction into Ammonia in Neutral Media.

It is of significance to design catalysts for achieving high-performance electrochemical nitrate reduction to ammonia (NRA) in mild neutral media. However, the faradaic efficiency and selectivity are still far from satisfactory. Here, the fabrication of an efficient catalyst was achieved by rationally doping Fe to Cu into a metasequoia-like nanocrystal of CuFe for NRA in neutral media.

One-step synthesis of IrO-decorated ultrathin NiFe LDH nanosheets for efficient oxygen evolution reaction.

The oxygen evolution reaction (OER) is a vital proton donor for various clean energy technologies. Here, we synthesized IrOx-decorated ultrathin NiFe-LDH nanosheets (thickness 1-2 nm) by a one-step co-precipitation method. The IrOx was uniformly dispersed on the surface of ultrathin NiFe-LDH nanosheets, greatly increasing the active sites and the electric conductivity for NiFe-LDH.

Recent Advances of Two-Dimensional (2 D) MXenes and Phosphorene for High-Performance Rechargeable Batteries.

The design and development of advanced electrode materials for high-performance rechargeable batteries have been subjected to extensive studies. Very recently, two-dimensional (2 D) nanomaterials have become promising candidates for batteries, owing to their unique physicochemical properties. In particular, MXenes and phosphorene, which exhibit tailored electrical conductivity and ion storage capability, have attracted increasing attention.

CoO-CeO/C as a Highly Active Electrocatalyst for Oxygen Reduction Reaction in Al-Air Batteries.

Developing high-performance and low-cost electrocatalysts for oxygen reduction reaction (ORR) is still a great challenge for Al-air batteries. Herein, CeO, a unique ORR promoter, was incorporated into ketjenblack (KB) supported CoO catalyst. We developed a facile two-step hydrothermal approach to fabricate CoO-CeO/KB as a high-performance ORR catalyst for Al-air batteries.

Nickel cobalt oxide/carbon nanotubes hybrid as a high-performance electrocatalyst for metal/air battery.

High-performance, low cost catalyst for oxygen reduction reaction (ORR) remains a big challenge. Herein, nanostructured NiCo2O4/CNTs hybrid was proposed as a high-performance catalyst for metal/air battery for the first time. The well-formed NiCo2O4/CNTs hybrid was studied by steady-state linear polarization curves and galvanostatic discharge curves in comparison with CNTs-free NiCo2O4 and commercial carbon-supported Pt.

Dynamic alterations of connexin43, matrix metalloproteinase-2 and tissue inhibitor of matrix metalloproteinase-2 during ventricular fibrillation in canine.

The aim of this study is to investigate the dynamic alterations of cardiac connexin 43 (Cx43), matrix metalloproteinase-2 (MMP-2) and tissue inhibitor of metalloproteinase-2 (TIMP-2) in the setting of different ventricular fibrillation (VF) duration. In this study, thirty-two dogs were randomly divided into sham control group, 8-min VF group, 12-min VF group, and 30-min VF group. Cx43 and phosphorylated Cx43 (p-Cx43) in tissues were detected by western blot and immunofluorescence analysis.

ZP123 reduces energy required for defibrillation by preventing connexin43 remodeling during prolonged ventricular fibrillation in swine.

In ventricular fibrillation, the uncoupling of gap junctions slows conduction velocity and increases action-potential dispersion, which slows and diminishes defibrillation. We studied how the peptide ZP123, a gap-junction enhancer, might lower defibrillation-energy requirements during ventricular fibrillation in live pigs. We randomly assigned 33 pigs into 3 groups: ZP123 (receiving a 1-µg/kg bolus and 10 µg/kg/hr of ZP123), control (receiving saline solution), and sham (undergoing a sham operation).

Imbalance between tissue inhibitor of metalloproteinase 1 and matrix metalloproteinase 9 after cardiopulmonary resuscitation.

Aims: This study aimed to determine whether (a) there was an imbalance between matrix metalloproteinase 9 (MMP-9) and tissue inhibitor of metalloproteinase 1 (TIMP-1) after cardiopulmonary resuscitation (CPR) in a canine model of prolonged ventricular fibrillation (VF); (b) with the duration of VF, the degree of the imbalance would be greater; and (c) there was a relationship between the level of MMP-9 or TIMP-1 and the cardiac function.

Methods And Results: Ventricular fibrillation was electrically induced in 24 dogs. The animals were randomly divided into 3 groups (sham control, n = 8; 8-minute VF, n = 8; 12-minute VF, n = 8).

Effect of ZP123, a gap junction modifier, on prolonged ventricular fibrillation in swine.

Objectives: It was the aim of this study to investigate the effect of ZP123 on prolonged ventricular fibrillation (VF) in swine.

Methods: VF was electrically induced in 20 pigs. The animals randomly received either ZP123 or saline control infusion before VF.

[Changes in myocardial connexin 43 during ventricular fibrillation].

Objective: To observe changes in connexin 43 (Cx43) after ventricular fibrillation (VF) and the effects of rotigaptide (ZP123) on Cx43.

Methods: Thirty domestic pigs were randomly assigned to three groups (10 in each group): sham group, model group and ZP123 group. VF was induced by an 80 V AC transthoracic shock for 5 seconds with the use of subcutaneous needles.