Developing highly conductive, stable, and active nonprecious hydrogen evolution reaction (HER) catalysts is a key step for the proposed economy. However, few catalysts, except noble metals, meet all requirements. By using state-of-the-art density functional calculations, herein we demonstrate that 2D MXenes, like Ti2C, V2C, Ti3C2, are terminated by mixture of oxygen atoms hydroxyl, while Nb2C Nb4C3O2 fully under standard conditions [pH 0, p(H2) = 1 bar, U 0 V vs electrode], findings in good...

Expanding the world of 2D materials Two-dimensional (2D) have a wide variety potential applications in electronics industry. However, certain compositions are difficult to obtain owing challenges exfoliating thin sheets from bulk crystals. Zavabeti et al. exploited liquid metals synthesize Ga 2 O 3 , HfO Gd and Al . The appear as surface layer gallium-based after Hf, Gd, or is dissolved into alloy. oxide that appears on with lowest energy, suggesting it should be possible make other oxides...

Abstract Suppressing dendrite formation at lithium metal anodes during cycling is critical for the implementation of future metal-based battery technology. Here we report that it can be achieved via facile process immersing electrodes in ionic liquid electrolytes a period time before assembly. This creates durable and ion-permeable solid–electrolyte interphase allows safe charge–discharge commercially applicable Li|electrolyte|LiFePO 4 batteries 1,000 cycles with Coulombic efficiencies...

The oxides of copper (Cu_xO) are fascinating materials due to their remarkable optical, electrical, thermal and magnetic properties.

Coronavirus disease 2019 (COVID-19) is a highly contagious caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Diagnosis of COVID-19 depends on quantitative reverse transcription PCR (qRT-PCR), which time-consuming and requires expensive instrumentation. Here, we report an ultrasensitive electrochemical biosensor based isothermal rolling circle amplification (RCA) for rapid detection SARS-CoV-2. The assay involves the hybridization RCA amplicons with probes that were...

Small-scale pumps will be the heartbeat of many future micro/nanoscale platforms. However, integration small-scale is presently hampered by limited flow rate with respect to input power, and their rather complicated fabrication processes. These issues arise as conventional pumping effects require intricate moving elements. Here, we demonstrate a system that call liquid metal enabled pump, for driving range liquids without mechanical parts, upon application modest electric field. This pump...

Bulk liquid metals have prospective applications as soft and fluid electrical thermal conductors in electronic optical devices, composites, microfluidics, robotics, metallurgy with unique opportunities for processing, chemistry, function. Yet metals' great potential nanotechnology remains its infancy. Although work to date focuses primarily on Ga, Hg, their alloys, expand the field, we define "liquid metals" alloys melting points (mp) up 330 °C, readily accessible processable even using...

As one of the transition metal oxides, niobium pentoxide (Nb2O5) offers a broad variety properties that make it potentially useful and highly applicable material in many different areas. In comparison to other Nb2O5 has received relatively little attention, which presents significant opportunity for future investigations aimed at fundamentally understanding this finding new interesting applications it. article, general overview is presented focuses on its fundamental properties, synthesis...

Abstract Liquid metal marbles that are droplets of liquid encapsulated by micro‐ or nanoparticles introduced. Droplets galinstan coated with insulators (including Teflon and silica) semiconductors WO 3 , TiO 2, MoO In 2 O carbon nanotubes) rolling over a powder bed also submerging in colloidal suspensions. It is shown these can be split merged, suspended on water, even stable when moving under the force gravity impacting flat solid surface. Furthermore, marble coating operate as an active...

Controlled actuation of soft objects with functional surfaces in aqueous environments presents opportunities for liquid phase electronics, novel assembled super-structures and unusual mechanical properties. We show the extraordinary electrochemically induced metal droplets coated nanoparticles, so-called “liquid marbles”. demonstrate that nanoparticle coatings these marbles offer an extra dimension affecting bipolar actuation. The nanoparticles can readily migrate along surface metals, upon...

Abstract Negative carbon emission technologies are critical for ensuring a future stable climate. However, the gaseous state of CO 2 does render indefinite storage this greenhouse gas challenging. Herein, we created liquid metal electrocatalyst that contains metallic elemental cerium nanoparticles, which facilitates electrochemical reduction to layered solid carbonaceous species, at low onset potential −310 mV vs /C. We exploited formation oxide catalyst metal/electrolyte interface, together...

α- and β-Phase MoO3 are synthesized using an electrodeposition method on fluorine-doped tin oxide (FTO) glass substrates from sodium-molybdate (Na2MoO4) solutions. We show that it is possible to obtain both β-MoO3 by manipulating the cyclic voltammetry (CV) parameters during electrodeposition. Raman spectroscopy, X-ray diffraction, scanning electron microscopy indicate applied potential range sweep rate strongly influential phase obtained surface morphology of electrodeposited thin films....

A new platform described as the liquid metal/metal oxide (LM/MO) framework is introduced. The constituent spherical structures of these frameworks are made micro‐ to nanosized metal spheres and oxides, combining advantages both materials. It shown that diameters stoichiometry can be actively controlled. Additionally, suspension demonstrates tuneable plasmon resonances. These assembled form LM/MO which capable demonstrating high sensitivity towards low concentrations heavy ions, enhanced...

The rapid and direct electrochemical formation of amorphous nanostructured Co(OH)₂on gold electrodes under room temperature conditions was found to be a highly active, yet stable, precursor for the OER.

Components with self-propelling abilities are important building blocks of small autonomous systems and the characteristics liquid metals capable fulfilling self-propulsion criteria. To date, there has been no exploration regarding effect electrolyte ionic content surrounding a metal for symmetry breaking that generates motion. Here we show controlled actuation droplets using only properties aqueous electrolyte. We demonstrate pH or concentration gradients across droplet induce both...

Abstract Liquid metals offer unprecedented chemistry. Here it is shown that they can facilitate self‐limiting oxidation processes on their surfaces, which enables the growth of metal oxides are atomically thin. This claim exemplified by creating thin hydrated MnO 2 using a Galvanic replacement reaction between permanganate ions and liquid gallium–indium alloy (EGaIn). The “liquid solution”–“liquid metal” process leads to reduction ions, resulting in formation oxide monolayer at interface. It...

Oxygen vacancies (Vo) in electrocatalysts are closely correlated with the hydrogen evolution reaction (HER) activity. The role of vacancy defects and effect their concentration, however, yet remains unclear. Herein, Bi2O3, an unfavorable electrocatalyst for HER due to a less than ideal adsorption Gibbs free energy (ΔGH*), is utilized as perfect model explore function Vo on performance. Through facile plasma irradiation strategy, Bi2O3 nanosheets different concentrations fabricated evaluate...

The strategic design and fabrication of efficient electrocatalysts are pivotal for advancing the field electrochemical water splitting (EWS). To enhance EWS performance, integrating non-noble transition metal catalysts through a cooperative double incorporation strategy is important offers compelling alternative to conventional precious metal-based materials. This study introduces novel, straightforward, single-step process fabricating bimetallic MoCo catalyst integrated within...

Chemical reaction studies of N-methyl-N-propyl-pyrrolidinium-bis(fluorosulfonyl)imide-based ionic liquid with the lithium metal surface were performed using ab initio molecular dynamics (aMD) simulations and X-ray Photoelectron Spectroscopy (XPS). The showed rapid spontaneous decomposition anion, subsequent formation long-lived species such as fluoride. also revealed cation to retain its structure by generally moving away from surface. XPS experiments evidence consistent aMD it is envisaged...

We demonstrate that a three dimensional (3D) crystalline tungsten trioxide (WO(3)) nanoporous network, directly grown on transparent conductive oxide (TCO) substrate, is suitable working electrode material for high performance electrochromic devices. This nanostructure, with achievable thicknesses of up to 2 μm, prepared at room temperature by the electrochemical anodization RF-sputtered film deposited fluoride doped tin (FTO) glass, under low applied anodic voltages and mild chemical...

We demonstrate aqueous phase biosynthesis of phase-pure metallic copper nanoparticles (CuNPs) using a silver resistant bacterium Morganella morganii. This is particularly important considering that there has been no report demonstrates and stabilization pure in the phase. Electrochemical analysis bacterial cells exposed to Cu(2+) ions provides new insights into mechanistic aspect ion reduction within cell indicates strong link between resistance machinery bacteria context metal reduction....

We show for the first time that by controlling growth kinetics of Morganella psychrotolerans, a silver-resistant psychrophilic bacterium, shape anisotropy silver nanoparticles can be achieved. This is particularly important considering there has been no report demonstrates control over Ag bacteria during biological synthesis. Additionally, we have performed electrochemistry experiments on bacterial cells after exposing them to Ag+ ions, which provide significant new insights about...

The electrochemical and electrocatalytic behaviour of silver nanoprisms, nanospheres nanocubes comparable size in an alkaline medium have been investigated to ascertain the shape dependent nanoparticles, which are extensively studied nanomaterial. nanomaterials were synthesised using chemical methods characterised with UV-visible spectroscopy, transmission electron microscopy X-ray diffraction. immobilised on a substrate glassy carbon electrode by cyclic voltammetry for their surface oxide...

The galvanic replacement reaction is a highly versatile approach for the creation of variety nanostructured materials. However, majority reports are limited to metallic nanoparticles or metal surfaces. Here we extend this elegant and describe liquid alloy galinstan with Ag Au. This achieved at macrosized droplet create marble that comprises core solid shell, whereby morphology outer shell determined by concentration ions used in solution during process. In principle, allows one recover...