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In-situ evolution of electrocatalysts is of paramount importance in defining catalytic reactions. Catalysts for aprotic electrochemistry such as lithium-sulfur (Li-S) batteries are the cornerstone to enhance intrinsically sluggish reaction kinetics but the true active phases are often controversial. Herein, we reveal the electrochemical phase evolution of metal-based pre-catalysts (Co4N) in working Li-S batteries that renders highly active electrocatalysts (CoSx ). Electrochemical cycling induces the transformation from single-crystalline Co4N to polycrystalline CoSx that are rich in active sites. This transformation propels all-phase polysulfide-involving reactions. Consequently, Co4N enables stable operation of high-rate (10 C, 16.7 mA cm-2 ) and electrolyte-starved (4.7 μL mg S-1 ) Li-S batteries. The general concept of electrochemically induced sulfurization is verified by thermodynamic energetics for most of low-valence metal compounds, which opens up catalyst innovation, reshape understanding of polysulfide electrocatalysis, and enlighten other catalytic reactions in aprotic electrochemistry.
This article was published in the following journal.
Name: Angewandte Chemie (International ed. in English)
On-site peroxide generation via electrochemical reduction is gaining tremendous attention due to its importance in many fields, including water treatment technologies. Oxidized graphitic carbon-based ...
The electrochemical CO 2 reduction reaction (CO 2 RR) to yield synthesis gas (syngas, CO and H 2 ) has been considered as a promising method to realize the net reduction in CO 2 emission. However, it ...
To acheive efficient water splitting, it is essential to develop catalysts with high electrochemical performance, enhanced durability and tunable properties. Most of the transition metal based catalys...
As the hydrogen has been increasingly considered as promising sustainable energy supply, the electrochemical water overall splitting driven by highly efficient non-noble metal electrocatalysts has aro...
The g-C3N4 is a promising viable-light-driven photocatalyst for H2 evolution reaction, however, the achievement of the high photocatalytic performance is primarily limited by the low separation effici...
The aim of this study is to demonstrate the non-inferiority of the ceramic-on-metal articulation using large diameter bearings (38mm to 60mm) compared to the metal on metal articulation us...
Use of cutaneous electrochemical conductance for preclinical screening of small-caliber nerve fibers
This study is being conducted to determine the rate of symptomatic and asymptomatic nonmalignant, noninfective soft tissue mass presence (referred to in the literature as pseudotumour, ALV...
Biomedical implant metals are reactive when in contact with body fluids. Some reactions may adverse the biocompatibility character of the material and should be studied. This can be achiev...
Slightly elevated blood metal levels have been found in adults undergoing hip and knee replacement. It is unknown whether pediatric patients with metal implant(plates/screws/rods) have ele...
A scanning probe microscopy technique that uses an ultramicroelectrode as the scanning probe that simultaneously records changes in electrochemical potential as it scans thereby creating topographical images with localized electrochemical information.
The period from onset of one menstrual bleeding (MENSTRUATION) to the next in an ovulating woman or female primate. The menstrual cycle is regulated by endocrine interactions of the HYPOTHALAMUS; the PITUITARY GLAND; the ovaries; and the genital tract. The menstrual cycle is divided by OVULATION into two phases. Based on the endocrine status of the OVARY, there is a FOLLICULAR PHASE and a LUTEAL PHASE. Based on the response in the ENDOMETRIUM, the menstrual cycle is divided into a proliferative and a secretory phase.
Nanoparticles produced from metals whose uses include biosensors, optics, and catalysts. In biomedical applications the particles frequently involve the noble metals, especially gold and silver.
The interdisciplinary science that studies evolutionary biology, including the origin and evolution of the major elements required for life, their processing in the interstellar medium and in protostellar systems. This field also includes the study of chemical evolution and the subsequent interactions between evolving biota and planetary evolution as well as the field of biology that deals with the study of extraterrestrial life.
The interval between two successive CELL DIVISIONS during which the CHROMOSOMES are not individually distinguishable. It is composed of the G phases (G1 PHASE; G0 PHASE; G2 PHASE) and S PHASE (when DNA replication occurs).