Correlating the current/voltage response of an electrode to intrinsic properties active material requires knowledge electrochemically surface area (ECSA), a parameter that is often unknown and overlooked, particularly for highly nanostructured electrodes. Here we demonstrate power nonaqueous electrochemical double layer capacitance (DLC) provide reasonable estimates ECSA across 17 diverse materials spanning metals, conductive oxides, chalcogenides. Whereas data recorded in aqueous...

The photocatalytic degradation mechanism of an azo dye, C.I. Reactive Black 5 (RB5), has been investigated in aqueous suspension SrTiO3/CeO2 composite under 250 W UV irradiation at pH 12.0. process was studied by monitoring the change RB5 concentration and intermediate products employing UV−visible spectrophotometry, ion chromatography (IC), gas chromatography/mass spectrometry (GC/MS) techniques depletion total organic carbon (TOC) content as a function time. adsorption peaks wavelengths...

Electrodeposited thin films and nanoparticles of Ni3S2 are highly active, poison- corrosion-resistant catalysts for oxygen reduction to water at neutral pH. In pH 7 phosphate buffer, displays catalytic onset 0.8 V versus the reversible hydrogen electrode, a Tafel slope 109 mV decade(-1), high faradaic efficiency four-electron O2 water. Under these conditions, activity stability exceeds that polycrystalline platinum manganese, nickel, cobalt oxides, illustrating potential pairing labile...

Abstract Mimicking the active site and substrate binding cavity of enzyme to achieve specificity in catalytic reactions is an essential challenge. Herein, porous coordination cages (PCCs) with intrinsic cavities tunable metal centers have proved regulation reactive oxygen species (ROS) generating pathways as evidenced by multiple photo‐induced oxidations. Remarkably, presence Zn 4 ‐μ ‐O center, PCC converted dioxygen molecules from triplet singlet excitons, whereas Ni center promoted...

Activating inert sp3 -sp3 carbon-carbon (C-C) bonds remains a major bottleneck in the chemical upcycling of recalcitrant polyolefin waste. In this study, redox mediators are used to activate C-C bonds. Specifically, N-hydroxyphthalimide (NHPI) is as mediator, which oxidized phthalimide-N-oxyl (PINO) radical initiate hydrogen atom transfer (HAT) reactions with benzylic C-H The resulting carbon readily captured by molecular oxygen form peroxide that decomposes into oxygenated bond-scission...

Comprehensive Summary The preparation and resolution of chiral molecules hold significant importance in scientific industrial domains, such as drug development manufacturing. In recent years, porous frameworks have attracted increasing attention asymmetric catalysis enantiomer due to their excellent performance. metal‐organic (MOFs), covalent organic (COFs), cages (POCs), coordination (PCCs) are important representative the framework family. Significantly, chirality can be easily introduced...

Large‐scale micro‐ and nano‐sized Eu 3+ ‐doped gadolinium tungstate molybdate Gd 2 MO 6 :Eu (M=Mo, W) red phosphors with special morphologies have been successfully prepared via an efficient molten salt synthesis (MSS) method at 950°C for h using NaCl as the reaction medium. The results of X‐ray powder diffraction patterns indicate that MoO WO monoclinic structures. scanning electronic microscope transmission electron studies revealed samples obtained by MSS in medium a sphere‐like...

Abstract Polymer electrolyte membranes employed in contemporary fuel cells severely limit device design and restrict catalyst choice, but are essential for preventing short‐circuiting reactions at unselective anode cathode catalysts. Herein, we report that nickel sulfide Ni 3 S 2 is a highly selective the oxygen reduction reaction presence of 1.0 m formate. We combine this with carbon‐supported palladium (Pd/C) to establish membrane‐free, room‐temperature formate cell operates under benign...

Abstract Starting from D,L ‐acid and SnCl 2 as catalyst, poly( ‐lactic acid) (PDLLA) was directly synthesized by melt polycondensation. Under the appropriate conditions such 0.5 wt % , 170–180°C, 70 Pa, 10 h, viscosity‐average molecular weight ( M η ) of PDLLA 4100 Da. produced most practical method used drug‐delivery material for erythromycin ciprofloxacin. The optimal preparation erythromycin–poly( acid)–microsphere (ERY–PDLLA–MS) lung targeting investigated, further confirmed good...

C2H6 and C2H4 gases are two typical decompositions produced by partial discharge of transformer oil. To fully evaluate the feasibility MoS2-based materials for detection gases, adsorption molecules on intrinsic Au-doped MoS2 monolayer have been studied in this paper First-principle Density Functional Theory (DFT). The mechanism were investigated carefully terms energy, distance, bandgap structure, charge transfer density states (DOS). calculated results show that structures with larger...

Electrochemical energy conversion requires electrodes that can simultaneously facilitate substrate bond activation and electron–proton charge transfer. Traditional co-localize both functions to a single solid|liquid interface even though each process is typically favored in disparate reaction environment. Herein, we establish strategy for spatially separating transfer by exploiting mixed conduction (MEPC) an oxide membrane. Specifically, interpose MEPC WOx membrane between Pt catalyst...

A novel GaN-based luminescent hybrid material has been prepared by covalently functionalizing the GaN matrices with an ionic liquid (IL), and then exchanging anion of IL lanthanide complexes. 1-Methyl-3-[3-(trimethoxysilyl)propyl]imidazolium chloride, a kind multi-functional room temperature IL, is used to silanize hydroxylated surfaces sample. After that, exchange measurement performed introduce tetrakis β-diketonate europium(III) complex matrices. The FTIR spectra, UV-vis diffuse...

In this work, flake-flower NiO was successfully prepared via a facile hydrothermal method. The microstructure of the synthesized sample characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and transmission (TEM). We find that hierarchical structure assembled numerous nanosheets with different size shape. fabricated sensor based on obtained exhibited excellent gas sensing performance including high response, outstanding selectivity stability towards 5 ppm CO at...

Abstract Mimicking the active site and substrate binding cavity of enzyme to achieve specificity in catalytic reactions is an essential challenge. Herein, porous coordination cages (PCCs) with intrinsic cavities tunable metal centers have proved regulation reactive oxygen species (ROS) generating pathways as evidenced by multiple photo‐induced oxidations. Remarkably, presence Zn 4 ‐μ ‐O center, PCC converted dioxygen molecules from triplet singlet excitons, whereas Ni center promoted...

Electrocatalytic synthesis of high-value chemicals has been attracting growing interest owing to its environmentally benign reaction pathways. Among these processes, the electrocatalytic reduction nitrate (NO3-) ammonia (NH3), known as NO3RR, and oxidation 5-hydroxymethylfurfural (HMFOR) stand out two cornerstone reactions; yet, their efficiency selectivity pose ongoing challenges. In this study, we introduce a charge manipulation approach for design highly efficient electrocatalysts...