In this paper, a multi-functional composite coating with low friction coefficient, high wear resistance and excellent tribocorrosion is fabricated on AZ31 Mg alloys by micro-arc oxidation spray-coating methods. The microstructure, composition of the are characterized SEM, EDS, XRD, FT-IR. Potentiodynamic polarization EIS tests conducted to evaluate corrosion coating. property also studied using pin-on-disk tribometer in 3.5 wt.% NaCl solution. It found that possesses better long-term than...

For Mg alloy, it is important to develop effective protection coatings against galvanic corrosion. In this work, the effects of plasma electrolytic oxidation (PEO) coating with and without a polyurethane (PU) top layer on corrosion (coupled mild steel) behavior AZ31 alloy are investigated. The microstructure compositions were studied by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffractometer (XRD) Fourier transform infrared spectroscopy (FT-IR)....

The water oxidation half-reaction at anodes is always considered the rate-limiting step of overall splitting (OWS), but actual bias distribution between photoanodes and cathodes photoelectrochemical (PEC) OWS cells has not been investigated systematically. In this work, we find that, for PEC consisting (nickel-modified

Real-time monitoring of hydroxyl radical (⋅OH) generation is crucial for both the efficacy and safety chemodynamic therapy (CDT). Although ⋅OH probe-integrated CDT agents can track production by themselves, they often require complicated synthetic procedures suffer from self-consumption ⋅OH. Here, we report facile fabrication a self-monitored agent (denoted as Fc-CD-AuNCs) incorporating ferrocene (Fc) into β-cyclodextrin (CD)-functionalized gold nanoclusters (AuNCs) via host-guest molecular...

Accelerating proton transfer has been demonstrated as key to boosting water oxidation on semiconductor photoanodes. Herein, we study proton-coupled electron (PCET) of five typical photoanodes [i.e., α-Fe2O3, BiVO4, TiO2, plasmonic Au/TiO2, and nickel-iron oxyhydroxide (Ni1-xFexOOH)-modified silicon (Si)] by combining the rate law analysis H2O molecules with H/D kinetic isotope effect (KIE) operando spectroscopic studies. An unexpected universal half-order kinetics is observed for H2O,...

The photoelectrochemical (PEC) urea oxidation reaction (UOR) presents a promising half‐reaction for green hydrogen production, but the stable resonance structure of molecule results in sluggish kinetics breaking C−N bond. Herein, we realize record PEC UOR performance on NiO‐modified n‐Si photoanode (NiO@Ni/n‐Si) by harnessing adsorbate‐adsorbate interaction. We quantificationally unveil dependence activation barrier coverage photogenerated surface high‐valent Ni‐oxo species (NiIV=O)...

Abstract This study introduces an innovative 3D numerical simulation method designed to address the direct current resistivity under undulating terrain conditions. The ingeniously utilizes 2D Fourier transform technology convert complex problems into 1D in space-wavenumber mixed domain, thereby simplifying computational process. We further assume background medium be layered and employ weighted residual solve this simplified problem. Additionally, accurately handle boundary nodes, we...

ABSTRACT Genetic analysis of short tandem repeat (STR) loci using noninvasive fecal samples is currently the most widely used method in genetic surveys giant pandas ( Ailuropoda melanoleuca ). However, low‐quality DNA obtained from may affect accuracy genotyping results and pose a challenge to accurately identify individuals. The aim this study was thus compare efficiency extraction kits obtaining high‐quality host panda samples. In study, six commercial extraction, QIAamp Fast Stool Mini...

The sluggish H2 O oxidation kinetics on photoanodes severely obstructs the overall solar-to-energy efficiency of photoelectrochemical (PEC) cells. Herein, we find a 10 to 55-fold increase photocurrent by conducting ammonia reaction (AOR) hematite (α-Fe2 O3 ) under near-neutral pH (9-11) and moderate applied potentials (1.0-1.4 VRHE compared oxidation. By rate law analysis operando spectroscopic studies, confirm non-radical nucleophilic attack NH3 molecules high-valent surface Fe-O species...

The photoelectrochemical (PEC) urea oxidation reaction (UOR) presents a promising half‐reaction for green hydrogen production, but the stable resonance structure of molecule results in sluggish kinetics breaking C−N bond. Herein, we realize record PEC UOR performance on NiO‐modified n‐Si photoanode (NiO@Ni/n‐Si) by harnessing adsorbate‐adsorbate interaction. We quantificationally unveil dependence activation barrier coverage photogenerated surface high‐valent Ni‐oxo species (NiIV=O)...

The sluggish water oxidation reaction (WOR) is considered the kinetic bottleneck of artificial photosynthesis due to complicated four-electron and four-proton transfer process. Herein, we find that WOR can be kinetically nearly barrierless on four representative photoanodes (i.e., α-Fe2O3, TiO2, WO3, BiVO4) under concentrated light irradiation, wherein rate-limiting O-O bond formation step driven by accumulated surface photogenerated holes exhibit a superior fourth-order kinetics. activation...

This work presents a photoanode with state-of-the-art selective ammonia oxidation performance and elucidates its barrierless N–O coupling mechanism.

Phosphate and aluminate electrolytes were used to prepare plasma electrolytic oxidation (PEO) coatings on 6061 aluminum alloy. The surface cross-section microstructure, element distribution, phase composition of the PEO characterized by SEM, EDS, XPS, XRD. friction wear properties evaluated pin-on-disk sliding tests under dry conditions. corrosion resistance was investigated electrochemical salt spray in acidic environments. It found that prepared from both phosphate mainly composed α-Al2O3...

<title>Abstract</title> The sluggish water oxidation reaction (WOR) is considered the kinetic bottleneck of artificial photosynthesis, due to complicated four-electron and four-proton transfer process. Herein, we find that WOR can be kinetically nearly barrierless on four representative photoanodes (i.e., α-Fe₂O₃, TiO₂, WO₃, BiVO₄) under concentrated light irradiation, wherein rate-limiting O − bond formation step driven by highly...

Abstract Semiconductor‐based photoelectrochemical (PEC) organic transformations usually show radical characteristics, in which the reaction selectivity is often difficult to precisely control due nonselectivity of radicals. Accordingly, several simple reactions (e.g., oxidations alcohols, aldehydes, and other small molecules) have been widely studied, while more complicated processes like C─C coupling remain challenging. Herein, a synergistic heterogeneous/homogeneous PEC strategy developed...

Genetic analysis of short tandem repeat (STR) loci using non-invasive fecal samples is currently the most widely used method in genetic surveys giant pandas (Ailuropoda melanoleuca). However, Low-quality DNA obtained from may affects correctness genotyping results and poses a challenge to accurately identify individuals. The aim this study was thus compare efficiency extraction kits obtaining high-quality host panda samples. In present study, six commercial extraction, QIAamp Fast Stool Mini...

Abstract The sluggish H 2 O oxidation kinetics on photoanodes severely obstructs the overall solar‐to‐energy efficiency of photoelectrochemical (PEC) cells. Herein, we find a 10 to 55‐fold increase photocurrent by conducting ammonia reaction (AOR) hematite (α‐Fe 3 ) under near‐neutral pH (9–11) and moderate applied potentials (1.0–1.4 V RHE compared oxidation. By rate law analysis operando spectroscopic studies, confirm non‐radical nucleophilic attack NH molecules high‐valent surface Fe−O...

Abstract Real‐time monitoring of hydroxyl radical (⋅OH) generation is crucial for both the efficacy and safety chemodynamic therapy (CDT). Although ⋅OH probe‐integrated CDT agents can track production by themselves, they often require complicated synthetic procedures suffer from self‐consumption ⋅OH. Here, we report facile fabrication a self‐monitored agent (denoted as Fc‐CD‐AuNCs) incorporating ferrocene (Fc) into β‐cyclodextrin (CD)‐functionalized gold nanoclusters (AuNCs) via host–guest...