Atomically dispersed ternary FeCoNb active sites anchored on N-doped honeycomb-like mesoporous carbon for highly catalytic degradation of 4-nitrophenol

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 677, P. 718 - 728

Published: Aug. 5, 2024

Language: Английский

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Low Rh doping accelerated HER/OER bifunctional catalytic activities of nanoflower-like Ni-Co sulfide for greatly boosting overall water splitting

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 677, P. 221 - 231

Published: Aug. 9, 2024

Language: Английский

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A High‐Entropy Single‐Atom Catalyst Toward Oxygen Reduction Reaction in Acidic and Alkaline Conditions

Advanced Science, Journal Year: 2024, Volume and Issue: 11(26)

Published: April 30, 2024

Abstract The design of high‐entropy single‐atom catalysts (HESAC) with 5.2 times higher entropy compared to (SAC) is proposed, by using four different metals (FeCoNiRu‐HESAC) for oxygen reduction reaction (ORR). Fe active sites intermetallic distances 6.1 Å exhibit a low ORR overpotential 0.44 V, which originates from weakening the adsorption OH intermediates. Based on density functional theory (DFT) findings, FeCoNiRu‐HESAC nitrogen‐doped sample were synthesized. atomic structures are confirmed X‐ray photoelectron spectroscopy (XPS), absorption (XAS), and scanning transmission electron microscopy (STEM). predicted high catalytic activity experimentally verified, finding that has overpotentials 0.41 0.37 V Tafel slopes 101 210 mVdec −1 at current 1 mA cm −2 kinetic densities 8.2 5.3 , respectively, in acidic alkaline electrolytes. These results comparable Pt/C. used Zinc–air battery applications an open circuit potential 1.39 power 0.16 W . Therefore, strategy guided DFT provided rational HESAC can be replaced high‐cost Pt toward beyond.

Language: Английский

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Portable Colorimetric Sensor Array Based on a Porous Single‐Atom Fe Nanozyme with Different Surface Sites for Identifying Artificially Ripened Fruits

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 35(2)

Published: Oct. 4, 2024

Abstract Single‐atom nanozyme materials have demonstrated exceptional specific catalytic activity due to the atomic‐level dispersion of their active centers. However, exploration mechanisms for single‐atom catalysts is so far limited 2D surfaces nanozymes. In this study, porous Fe (psaFeN) successfully prepared through a straightforward coordination‐assisted polymerization‐assembly strategy. The psaFeN composite nanospheres are uniformly sized, exhibiting excellent dispersibility with well‐organized pore channels extending from center surface. Density functional theory calculations reveal that in nanozyme, (010) facets serve as primary surface, where atoms form tri‐coordinated or tetra‐coordinated structures doped nitrogen atoms. (100) act auxiliary reactive Fe─N center. exhibits POD‐like ( K m = 1.77 mM; V max 173.53 × 10 − ⁸ M s −1 ). Given bioactivity, portable colorimetric biosensor constructed distinguishing artificially ripened fruits naturally ones. sensor achieves precise discrimination detection limit low 310 nmol L . This study anticipated offer valuable insights into understanding 3D nanozymes, promoting application development robust biosensors food safety.

Language: Английский

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Self‐Encapsulated Ni Nanoparticles on Delignified Wood Carbon for Efficient Urea‐Assisted Hydrogen Production

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 8, 2024

Abstract Developing efficient, low‐cost electrocatalysts for industrial‐level hydrogen production remains a significant challenge. Here lattice‐distorted Ni nanoparticles (NPs) encapsulated within nitrogen‐doped carbon shell on delignified wood (Ni‐NC@DWC) are constructed through chitosan‐induced assembly and the pyrolysis process. Experimental theoretical results indicate that lattice distortion due to strong metal‐support interactions, boosts electron transfer reaction intermediate adsorption/desorption, enhancing both urea oxidation (UOR) evolution (HER). Interestingly, active center 3+ ‐O is dynamically cyclically generated during UOR. When utilized as self‐standing electrode in an alkaline electrolyte, Ni‐NC@DWC exhibits low potentials of 24 mV 1.244 V at 100 mA cm −2 HER UOR, respectively. Moreover, achieves ultrasmall cell voltage 1.13 urea‐assisted water splitting can operate stably over 1000 h. Furthermore, when it self‐assembled anion exchange membrane (AEM) electrolyzer, requires only 1.62 2000 industrial operates 150 h without degradation, confirming highly attractive economical, sustainable, scalable production.

Language: Английский

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Dual amplification for PEC ultrasensitive aptasensing of biomarker HER-2 based on Z-scheme UiO-66/CdIn2S4 heterojunction and flower-like PtPdCu nanozyme

Talanta, Journal Year: 2024, Volume and Issue: 274, P. 126034 - 126034

Published: April 3, 2024

Language: Английский

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Strain engineering of CoSAN C catalyst toward enhancing the oxygen reduction reaction activity

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 678, P. 447 - 457

Published: Aug. 25, 2024

Language: Английский

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Palladium nanocrystals coupled with quasi-cuboid ceria embedded nitrogen-doped graphene aerogel boosts ethanol electrocatalytic oxidation

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 106, P. 16 - 22

Published: Jan. 31, 2025

Language: Английский

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Air-breathing cathode for aluminum–air battery: From architecture to fabrication and evaluation

Materials Science and Engineering R Reports, Journal Year: 2025, Volume and Issue: 163, P. 100942 - 100942

Published: Feb. 1, 2025

Language: Английский

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Zeolitic imidazole framework-derived rich-Zn-Co3O4/N-doped porous carbon with multiple enzyme-like activities for synergistic cancer therapy

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 665, P. 1065 - 1078

Published: March 29, 2024

Language: Английский

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