Surface nitriding to improve the catalytic performance of FeNi for the oxygen evolution reaction.

Solving the problem of the slow kinetic process of the oxygen evolution reaction by electrocatalysts has attracted extensive attention. Here, we report an enhancement of the oxygen evolution reaction (OER) electrocatalytic activity the surface nitriding of FeNi nanosheets for the formation of amorphous Fe/Ni-N species. The optimized Fe/Ni-N@FeNi nanosheets exhibit an overpotential of 251 mV to achieve a current density of 10 mA cm and an excellent durability of 210 h.

Fe in a tetrahedral position determined the electrocatalytic properties in FeMnO.

As an electrocatalyst for the oxygen evolution reaction (OER) for water decomposition purposes, spinel ferrite materials have gained a lot of attention from many researchers. Herein, we document a co-precipitation synthesis of antitypical spinel nanoparticles (FeMnO) by post-annealing at different temperatures to enable modulation of the cationic oxidation state and tuning of the conversion degree for efficient and good OER performance. The electrocatalytic activity test shows that the sample annealed at 500 °C has the most optimal catalytic activity with an overpotential of 360 mV at a current density of 10 mA cm and a Tafel slope as low as 105.

Hydrogen-etched CoS to produce a CoS@CoS heterostructure electrocatalyst for highly efficient oxygen evolution reaction.

There is a pressing requirement for developing high-efficiency non-noble metal electrocatalysts in oxygen evolution reactions (OER), where transition metal sulfides are considered to be promising electrocatalysts for the OER in alkaline medium. Herein, we report the outstanding OER performance of CoS@CoS heterojunctions synthesized by hydrogen etched CoS, where the optimized heterojunction shows a low of 396 mV and a small Tafel slope of 181.61 mV dec.

Low-Dimension Nanomaterial-Based Sensing Matrices for Antibiotics Detection: A Mini Review.

Antibiotics, a kind of secondary metabolite with antipathogen effects as well as other properties, are produced by microorganisms (including bacterium, fungi, and actinomyces) or higher animals and plants during their lives. Furthermore, as a chemical, an antibiotic can disturb the developmental functions of other living cells. Moreover, it is impossible to avoid its pervasion into all kinds of environmental media via all kinds of methods, and it thus correspondingly becomes a trigger for environmental risks.

The preparation of liquefied bio-stalk carbon nanofibers and their application in supercapacitors.

Carbon nanofibers (CNFs) have been widely used in electrochemical energy storage devices because of their excellent conductivity, extremely large surface area and structural stability. Herein, we obtained a viscous, liquefied bio-stalk carbon the simple chemical treatment of biomass, and mixed it with polyacrylonitrile to prepare a spinning solution. Subsequent electrospinning and high temperature activation resulted in the successful preparation of liquefied lignin-based activated carbon nanofibers.

Potential factors and mechanism of particulate matters explosive increase induced by free radicals oxidation.

Atmospheric particulate pollution in China has attracted much public attention. Occasionally, the particle number concentration increases sharply in a short time period, which is defined as a "particulate matter explosive increase". Heavy particulate matter pollution not only reduces visibility but also has an adverse effect on human health.

Preparation and electrochemical studies of electrospun phosphorus doped porous carbon nanofibers.

An ultra-facile fabrication process for the preparation of phosphorus doped porous carbon nanofibers (P-PCNFs) through the electrospinning and heat treatment method has been studied. The materials were characterized by X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy. Studies showed that fabricated P-PCNFs have unique porous fibers structures, large specific surface area (462.