The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Design of highly efficient electrocatalysts for alkaline hydrogen evolution reaction (HER) is of paramount importance for water electrolysis, but still a considerable challenge because of the slow HER kinetics in alkaline environments. Alloying is recognized as an effective strategy to enhance the catalytic properties. Lanthanides (Ln) are recognized as an electronic and structural regulator, attributed...
A novel semiconductive Co/Fe‐MOF embedded with Fe2O3 nanocrystals (Fe2O3@CoFe‐MOF) is developed as a trifunctional electrocatalyst for the urea oxidation reaction (UOR), oxygen evolution reaction (OER), and hydrogen evolution reaction for enhancing the efficiency of the hydrogen production via the urea‐assisted overall water splitting. Fe2O3@CoFe‐TPyP‐MOF comprises unsaturated metal‐nitrogen coordination...
On account of high capacity and high voltage resulting from anionic redox, Li‐rich layered oxides (LLOs) have become the most promising cathode candidate for the next‐generation high‐energy‐density lithium‐ion batteries (LIBs). Unfortunately, the participation of oxygen anion in charge compensation causes lattice oxygen evolution and accompanying structural degradation, voltage decay, capacity attenuation,...
Biomimetic Peptoid Membranes
Co‐assembly of carbon nanotube porins into peptoid sheets creates novel precision pore membrane nanostructures. The membrane matrix is made up of peptoids, self‐assembled designed sequence polymers, while carbon nanotube porins, short fragments of carbon nanotubes inserted into the peptoid matrix, form precision pores. This new membrane could be advantageous for high‐value...
The shuttling effect and sluggish reaction kinetics are the main bottlenecks for the commercial viability of lithium–sulfur (Li–S) batteries. Metal‐nitrogen‐carbon single atom catalysts have attracted much attention to overcoming these obstacles due to their novel electrocatalytic activity. Herein, a novel cooperative catalytic interface with dual active sites (oversaturated Fe‐N5 and polar Fe2O3...
Robust and cost‐effective membrane‐based separations are essential to solving many global crises, such as the lack of clean water. Even though the current polymer‐based membranes are widely used for separations, their performance and precision can be enhanced by using a biomimetic membrane architecture that consists of highly permeable and selective channels embedded in a universal membrane matrix...
Artificial organelles are compartmentalized nanoreactors, in which enzymes or enzyme‐mimic catalysts exhibit cascade catalytic activities to mimic the functions of natural organelles. Importantly, research on artificial organelles paves the way for the bottom‐up design of synthetic cells. Due to the separation effect of microcompartments, the catalytic reactions of enzymes are performed without the...
3D porous Ni is fabricated via an easily scalable electroless plating method using a dynamic template formed through in‐situ hydrogen bubbles. The pore size in the range of several micrometers is controllable through adjusting the Ni2+ depositing rate and hydrogen bubbles releasing rate. The Ni3S2 nanosheet arrays anode is then grown on the unique 3D porous Ni current collector followed by subsequent...
Since the advent of graphene ushered the era of 2D materials, many forms of hydrogenated graphene have been reported, exhibiting diverse properties ranging from a tunable bandgap to ferromagnetic ordering. Patterned hydrogenated graphene with micron‐scale patterns has been fabricated by lithographic means. Here, successful millimeter‐scale synthesis of an intrinsically honeycomb‐patterned form of...
Single‐atom catalysts (SACs) with specific coordination environment are expected to be efficient electrocatalysts for oxygen reduction reaction (ORR). Herein, NiN4C10 coordination site is constructed through encapsulating Ni2+ into the cavity of ZIF‐8 as a self‐sacrificing precursor and anchoring it on 3D N‐doped carbon frameworks. The NiN4C10 catalyst shows excellent ORR activity and stability,...
The phenomena and mechanism of electrospray modes in nanoscale are investigated from experiments and molecular dynamics simulations. It is found that the ionic concentration plays a crucial role in determining the dripping or the jetting modes in a nanoscale electrospray system. Molecular dynamics simulations uncover that the two modes are caused by the competition between the electric field stress...
Low threshold micro/nanolasers have attracted extensive attention for wide applications in high‐density storage and optical communication. However, constrained by quantum efficiency and crystalline quality, conventional semiconductor small‐sized lasers are still subjected to a high lasing threshold. In this work, a low‐threshold planar laser based on high‐quality single‐crystalline hexagonal CdS nanoplatelets...
Recently, organometal halide perovskite‐based optoelectronics, particularly lasers, have attracted intensive attentions because of its outstanding spectral coherence, low threshold, and wideband tunability. In this work, high‐quality CH3NH3PbBr3 single crystals with a unique shape of cube‐corner pyramids are synthesized on mica substrates using chemical vapor deposition method. These micropyramids...
Tuning the optical properties of 2D direct bandgap semiconductors is crucial for applications in photonic light source, optical communication, and sensing. In this work, the excitonic properties of molybdenum disulphide (MoS2) are successfully tuned by directly depositing it onto silica microsphere resonators using chemical vapor deposition method. Multiple whispering gallery mode (WGM) peaks in the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.