Second-Shell Coordination Environment Modulation for MnN Active Sites by Oxygen Doping to Boost Oxygen Reduction Performance.

As a category of transition metal-nitrogen-carbon (M-N-C) catalysts, Mn-based single-atom catalysts (SACs) are considered as promising non-precious metal catalysts for stable oxygen reduction reaction (ORR) due to their Fenton-inactive character (versus Fe) and more abundant earth reserves (versus Ni, Co). However, their ORR activity is unsatisfactory. Besides, the structure-activity relationship via tuning the coordination environment of the second coordination shell for transition metal single sites is still elusive.

Unveiling the Role of Cationic Pyridine Sites in Covalent Triazine Framework for Boosting Zinc-Iodine Batteries Performance.

Rechargeable Zinc-iodine batteries (ZIBs) are gaining attention as energy storage devices due to their high energy density, low-cost, and inherent safety. However, the poor cycling performance of these batteries always arises from the severe leakage and shuttle effect of polyiodides (I and I ). Herein, a novel cationic pyridine-rich covalent triazine framework (CCTF-TPMB) is developed to capture and confine iodine (I) species via strong electrostatic interaction, making it an attractive host for I in ZIBs.

Stable and High-performance Flow H-O Fuel Cells with Coupled Acidic Oxygen Reduction and Alkaline Hydrogen Oxidation Reactions.

Conventional H-O fuel cells suffer from the low output voltage, insufficient durability, and high-cost catalysts (e.g., noble metals).

Research on the initiation pressure criterion of directional hydraulic fracturing in coal mine.

Directional hydraulic fracturing (DHF) is more and more widely used in coal mines in China for hard roof and coal burst control. The key to this technology is to determine the crack initiation pressure that affected by the shape of the artificial notch and the stress state around the fracturing hole. Reasonable and simple formula for fracturing pressure calculation is essential since the fracturing pump used in coal mines is usually limited by the harsh conditions and hardly replaced once selected.

Fe/Co dual metal catalysts modulated by S-ligands for efficient acidic oxygen reduction in PEMFC.

Here, we report a conceptual strategy for introducing spatial sulfur (S)-bridge ligands to regulate the coordination environment of Fe-Co-N dual-metal centers (Spa-S-Fe,Co/NC). Benefiting from the electronic modulation, Spa-S-Fe,Co/NC catalyst showed remarkably enhanced oxygen reduction reaction (ORR) performance with a half-wave potential () of 0.846 V and satisfactory long-term durability in acidic electrolyte.

LINC00461/miR-4478/E2F1 feedback loop promotes non-small cell lung cancer cell proliferation and migration.

Non-small cell lung cancer (NSCLC) is a prevalent subtype of lung cancer, whose mortality is high. Long non-coding RNAs (lncRNAs) have caught rising attentions because of their intricate roles in regulating cancerization and cancer progression. Long intergenic non-protein coding RNA 461 (LINC00461) has recently shown oncogenic potential in several cancers, but the function of LINC00461 in NSCLC remains to be investigated.