Mutual treatment of algae organic matters and heavy metal ions using a coagulation process: Processes and mechanisms

Separation and Purification Technology, Год журнала: 2025, Номер 362, С. 131900 - 131900

Опубликована: Янв. 31, 2025

Язык: Английский

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Interface Engineering of Crystalline Cu-Amorphous Pt Heterophase for Enhanced Zno Hydrogen Sensitivity Performance

Опубликована: Янв. 1, 2025

The construction of crystalline-amorphous heterogeneous phase interfaces is an effective strategy to enhance their surface active sites. We successfully synthesised amorphous Pt-crystalline Cu (aPtcCu) nanospheres for ultrasensitive H2 detection. Cu2+ first reduced in the oleylamine−ascorbic acid (OAm-AA) solvent system due inhibition Pt reduction. Next Pt2+ by electrocoupling substitution already and amorphisation achieved strong OAm adsorption. gas sensing test results show that aPtcCu/ZnO sensor has higher response lower working temperature (160 oC) than Pt/ZnO (180 ZnO (240 oC). Moreover, can detect as low 2 ppm response/recovery time only s/6 s. significantly sensitization characteristic aPtcCu be attributed following: 1) more site on Pt; 2) crystalline/amorphous heterophase interface separates electrons holes, which further catalytic activity aPtcCu; 3) Pt4+ ↔ accelerates reaction surface. prepared expected a candidate monitoring hydrogen leakage, provides new direction application amorphous/crystalline sensitizers sensors.

Язык: Английский

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Dynamic Reconstruction of Ce‐Doped Fe₂P/NiCoP Hybrid for Ampere‐Level Oxygen Evolution in Anion Exchange Membrane Water Electrolysis

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 10, 2025

Abstract The sluggish kinetics of the oxygen evolution reaction (OER) critically limit efficiency anion exchange membrane water electrolysis (AEMWE). Herein, a Ce‐doped bimetallic Fe 2 P/NiCoP hybrid pre‐catalyst that undergoes dynamic reconstruction to activate highly efficient OER pathway is designed. optimized Ce 0.1 ‐Fe exhibits an impressively low overpotential 280 mV at 0.5 A cm −2 and small Tafel slope 55.3 dec −1 in 1.0 M KOH. Remarkably, when integrated as anode AEMWE electrolyzer, it delivers cell voltage 1.812 V maintains stable performance for over 500 h 60 °C. In situ characterizations density functional theory (DFT) calculations reveal Ce‐doping enhances surface modulates electronic structure, thereby reducing energy barriers intermediates (Δ G *OH Δ *OOH ) formation accelerating kinetics. This work introduces novel strategy utilize catalyst reconstruction, advancing their applications systems.

Язык: Английский

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Intelligent Responsive Armored Aerogel for Efficient Natural Seawater Electrolysis at High Current Density

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 7, 2025

Abstract Natural seawater electrolysis faces significant challenges due to the complex environment, particularly formation of insoluble deposits on cathode that block active sites. Here, an intelligent phthalocyanine‐armorized Ru aerogel electrocatalyst is introduced exhibits exceptional hydrogen evolution reaction (HER) performance and outstanding stability at industrial current densities in natural seawater. The armor promotes dissociation water self‐captures protons build acidic microenvironment, creating a positively charged layer shields against Mg Ca cations This continuously responds throughout process, offering dynamic, long‐term protection electrode. unsaturated Lewis acid sites center phthalocyanine binds OH ⁻ , slowing down rise pH avoiding precipitation. Additionally, significantly reduces HER energy barriers aerogel, enhancing its intrinsic catalytic activity. Consequently, demonstrates overall water‐splitting voltage 2.35 V maintains for over 250 hours densities. responsive presented here offers promising strategy advance efficiency durability direct electrolysis.

Язык: Английский

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Crystal Field Stabilization Energy Asymmetrically Constructed Built‐in Electric Fields for Efficient Water Cracking

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Abstract Efficient bifunctional electrocatalysts for hydrogen and oxygen evolution reactions (HER OER) play crucial roles in water electrolysis. However, the discrepancy binding affinities of catalytic sites to O/H‐contained intermediates makes it difficult achieve OER HER catalysis simultaneously. Multi‐component heterostructures have been demonstrated be an effective solution realize electrocatalysts, but division labor action mechanism each component are not fully elucidated. Therefore, based on asymmetrical crystal field stabilization energy (CFSE) between NiS Ni 2 P, heterogeneous catalyst (NiS/Ni P@NF) with built‐in electric (BEF) is constructed this paper, which showed efficient bifocal cracking. DFT calculation has confirmed that BEF causes directional movement electrons material, thus optimizing OER/HER reaction path. Further control experiments indicated P serves as active species corresponding HER, NiS/Ni P@NF delivers a remarkably reduced cell voltage 1.62 V (10 mA cm −2 ) within H‐type electrolyzer both anode cathode electrodes. The strategy constructing CFSE potential precisely induce local electron flow site accurately design multifunctional catalysts composition‐function contrast.

Язык: Английский

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Ligand‐Driven Annular‐Epitaxial Growth of CuS‐Au Heterostructures as Trinity Plasmonic Nanozyme for Multimode Diagnosis of Pathogenic Bacteria

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 24, 2025

Abstract This study presents a novel method to control the site‐selective growth of Au nanostars on CuS nanodisc substrate, it indicates that surfactant ligands play key role in architecture control, only CTAC and homologous series with appropriate affinity can direct annular‐epitaxial nanoparticles CuS, which demonstrates superior peroxidase (POD)‐mimic SERS activity. Mechanistic studies indicate plasmon‐enhanced catalytic activity be attributed spatially separated CuS‐Au heterostructure, supports light‐triggered hot electron‐hole pairs production localized surface plasmon resonance hotspots. For practical biosensing, heterostructures assembled lateral flow assay (LFA) was used for SERS/catalytic colorimetric/photothermal three‐mode detection Streptococcus pneumoniae Klebsiella , visually colorimetric mode at 103 CFU/mL quantitative SERS/photothermal modes 2–10 2 within 15 min, clinical samples were validate assay, result 100% concordant results real‐time PCR. provides unique avenue controllably produce nanozyme, provide multi‐mode signals LFA application meet requirements different scenarios.

Язык: Английский

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Regular-Hexahedron-Shaped Iron–Copper Bimetallic Oxides Engineered on Plasma-Treated Iron Foam for Enhanced Electrocatalytic Oxygen Evolution in an Alkaline Medium

Inorganic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Май 5, 2025

Designing a highly efficient transition-metal-based electrocatalyst for the oxygen evolution reaction (OER) in an alkaline electrolyte by green and low-cost protocol is still facing many challenges. Herein, regular-hexahedron-shaped iron-copper oxide (CuFe2O4-Fe2O3) engineered on plasma-treated iron foam (PFF) with one-step hydrothermal process. Benefiting from formed rich heterointerfaces, obtained CuFe2O4-Fe2O3/PFF exhibits outstanding OER activity stability medium, overpotential delivering current density of 10 mA cm-2 (j10) only 190 mV. Meanwhile, thanks to micronized hexahedron profile, also shows excellent electrocatalytic stability, decays 8% after 90 h test under high (j100). Furthermore, theory calculation (DFT) indicates that Fe sites exposed heterointerface CuFe2O4 Fe2O3 are main active centers O2 medium.

Язык: Английский

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Central Composite Design Optimization of Cobalt-Copper Phosphate Binderless Battery-grade Electrode via Electrodeposition Technique

Electrochimica Acta, Год журнала: 2025, Номер unknown, С. 146471 - 146471

Опубликована: Май 1, 2025

Язык: Английский

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Interfacial Component Coupling Effects Induce Electron Redistribution for Enhanced Hydrazine‐Assisted Hydrogen Production at Ampere-Level Current Densities

Nano Energy, Год журнала: 2025, Номер unknown, С. 111201 - 111201

Опубликована: Июнь 1, 2025

Язык: Английский

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