Zn-N-C possesses the intrinsic inertia for Fenton-like reaction and can retain robust durability in harsh circumstance, but it is often neglected oxygen reduction (ORR) because of its poor catalytic activity. Zn fully filled 3d

A clean N₂-plasma was employed to develop self-supported porous tungsten nitride nanowires on carbon cloth (WN NW/CC) as an efficient 3D electrocatalyst for hydrogen evolution. The resulting catalyst gives a high activity and outstanding stability in both acidic alkaline solutions.

A 3D-composite structure of FeP nanorods on vertically aligned graphene nanosheets has been fabricated for the high-performance hydrogen evolution reaction.

Novel 3D porous tungsten carbide hybrid nanowires (p-WC_xNWs) are prepared on carbon cloth as a binder-free efficient electrocatalyst for hydrogen evolution. It shows high activity and outstanding stability in both acidic alkaline solutions.

Ni decorated MoO₂ nanowires gives platinum-like HER activity and unprecedented stability over 320 hours even in the order of 1000 mA cm⁻² alkaline solution.

A N, O-doped, edge- and defect-rich vertically aligned graphene has been fabricated through a simple one-step method for highly enhanced oxygen evolution reaction.

To meet the practical demand of wearable/portable electronics, developing high-efficiency and durable multifunctional catalyst in-situ assembling catalysts into electrodes with flexible features are urgently needed but challenging. Herein, we report a simple route to fabricate bendable by carbonization metal ion absorbed polyaniline precursor. Alloy nanoparticles encapsulated in graphite layer uniformly distributed N-doping carbon nanorod skeleton. Profiting from favorable free-standing...

Coaxial connectors are one of the main contributors to passive intermodulation (PIM) in radio frequency systems. Such systems exhibit nonlinear characteristics, especially as transmission power is increased. In this paper, microscopic surface analysis and macroscopic models introduced provide explanations for PIM characteristics make more precise predictions third-order fifth-order products (IM3 IM5) resulting from n-type connectors. The equivalent circuit presented insight into effects...

Abstract Developing non‐precious bifunctional electrocatalysts to drive the over water splitting that can operate well at high current densities (1,000 mA/cm 2 ) is an urgent requirement for viable electrolysis of water. Transition metal oxides (TMO) have been intensely investigated as one most efficient oxygen evolution reaction (OER) catalysts. Unfortunately, their sluggish kinetics towards hydrogen (HER) bring about poor overall performance. In this study, we perform a simple method...

This study examined the associations between health literacy and smoking behaviors among residents in Ningbo City, Zhejiang Province, China, investigating both impact of on prevalence intensity, its potential role cessation interventions. cross-sectional analyzed data from 2,948 male participants 2023 Health Literacy Tobacco Use Surveillance Survey. We applied logistic regression models restricted cubic spline analyses to assess association behaviors, adjusting for demographic...

The utilization of a highly active and robust bifunctional catalyst for simultaneously producing H2 O2 is still major challenging issue, which vital improving the efficiency overall water splitting. Herein, we employ novel plasma-assisted strategy to rapidly conveniently synthesize three-dimensional (3D) porous composite nanosheets assembled on monodispersed Co nanoparticles encapsulated in carbon framework (CoNPs@C) cloth. Such 3D hierarchical nanosheet improves exposure accessibility sites...

Though transition-metal-based materials have emerged as the most promising alternatives to Pt-based electrocatalysts in hydrogen evolution reaction (HER), only a few of them (Fe-, Co-, Ni-, W-, and Mo-based materials) are used efficient HER electrocatalysts, while others generally considered HER-inactive with poor activities. Here, theory-guided experiment is carried out activate titanium dioxide new electrocatalyst. First-principles simulations indicate that adsorption free energy could be...

Electrical connector failures may alter the signal that is being transmitted and one of major causes low communication quality. As degrades, dc resistance impedance characteristics induced by corrosion products should both be considered. In this paper, effects electrical degradation on its high-frequency behaviors were experimentally studied theoretically analyzed. A series experiments was conducted to test internal connectors for different levels using an analyzer. It found when initially...

Abstract Translating a homogenous catalyst into heterogeneous requires fundamental understanding of how the “fits” zeolite and reaction is influenced. Previous studies bimetallic design identified potent copper homobinuclear catalyst, [(L)Cu 2 (H)] + for selective decomposition formic acid. Here, close interplay between theory experiment shows to preserve this reactivity within zeolites. Gas‐phase experiments DFT calculations showed that switching from 1,1‐bis(diphenylphosphino)‐methane...

A novel 5th-order cross-coupled tunable bandpass filter based on full-wavelength resonator with four independent coupling regions, including two electric and magnetic regions is proposed. The slop of the coefficients versus resonant frequency can be pre-defined to meet requirement constant bandwidth. bandwidth cascaded trisection (CT) structures, one all type CT cell cell, cells share a common reduce size. Therefore, transmission zeros are generated besides passband for improving...

Background Health literacy (HL) is a protective factor for some chronic diseases. However, its role in the Coronavirus Disease 2019 (COVID-19) pandemic has not been clarified. This study aims to explore association between HL and COVID-19 knowledge among residents Ningbo. Methods A total of 6,336 aged 15–69 years Ningbo were selected by multi-stage stratified random sampling method. The “Health Literacy Questionnaire Chinese Citizens (2020)” was used evaluate relationship HL. Chi-square...

Ferromagnetic materials in coaxial connectors are one of the main contributors to passive intermodulation (PIM) radio frequency systems. In this paper, effects coating and iron content base brass on PIM performance were theoretically modeled analyzed, results experimentally verified. A finite-element analysis model for a cross section inner conductor was developed evaluate current density distribution with different materials, thickness, copper alloy. Simulation calculations performed study...

In alkaline media, the water-dissociation-related Volmer process always suppresses hydrogen formation/desorption process, which makes it challenging to develop non-noble-metal electrocatalysts with excellent catalytic activity. Here, we proposed a two-pronged strategy simultaneously promote kinetic of both water dissociation and desorption Co-doped WO2/amorphous CoxW hybrid electrocatalyst. Impressively, optimized exhibits an outstanding evolution reaction (HER) activity quite small Tafel...

The widespread application of irregular arrays is prevented due to their low gain and high sidelobe at large scanning angles. This article proposes a wide-angle approach based on unequal phase feeding for arrays. Through different elements in subarray, the radiation vector deflected, reducing relative wavelength path distance. proposed array realizes improved directivity sidelobes angles, cost small reduction broadside. method symmetrical exchange achieves wideband capability, even though...

The design of efficient and robust non-precious metal electrocatalysts towards oxygen evolution reaction (OER) is great value for developing green energy technologies. in-situ formed high-valence (oxy)hydroxides species during the reconstruction process pre-catalysts are recognized as real contributing sites OER. However, generally undergo a slow inadequate self-reconstruction. Herein, we reported PO43− optimized CoFe-based OER catalysts with amorphous structure, which enables fast deep...

Radio frequency (RF) connectors may exhibit nonlinear characteristics in the higher levels of transmission power, which causes passive intermodulation (PIM) to seriously degrade performance communication system, even when are pristine. Accordingly, it is important investigate PIM induced by effects RF connectors. In present work, an equivalent circuit model for a contact surface coaxial connector was analyzed and physical mechanism investigated explain sources nonlinearities. Simulations...