Surface Engineering‐Induced d‐Band Center Down‐Regulation in High‐Entropy Alloy Nanowires for Enhanced Nanozyme Catalysis

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract High‐entropy alloys (HEAs) have garnered extensive attention owing to their broad compositional tunability and high catalytic activity. However, precisely modulating the enzyme‐like activity of HEAs enhancing biocompatibility for biological applications remain severely challenging. Herein, PtRuFeCoNi HEA nanowires (NWs) are synthesized by adjusting metal composition surface‐engineered with polydopamine (PDA) form NWs@PDA nanozymes (HEzymes@PDA) superior photothermal properties. Density functional theory calculations Sabatier principle reveal that self‐polymerized PDA surface engineering moderately lowers d‐band center HEAs, optimizes charge distribution, enhances adsorption–desorption efficiency substrates. As a proof‐of‐concept, HEzymes@PDA synergistically integrated hydrogels biosensing analysis. This study presents an innovative paradigm designing highly active via demonstrates immense potential in sensing applications.

Language: Английский

Suppression of Structural Heterogeneity in High‐Entropy Intermetallics for Electrocatalytic Upgrading of Waste Plastics

Angewandte Chemie, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 29, 2024

Abstract The key to fully realizing the potential of high‐entropy alloys (HEAs) lies in balancing their inherent local chemical disordering with long‐range ordering required for electrochemical applications. Herein, we synthesized a distinctive L1 0 ‐(PtIr)(FeMoBi) intermetallics (HEIs) exhibiting nanoscale order and atomic scale short‐range disorder via lattice compensation strategy mitigate entropy reduction tendency. (PtIr)(FeMoBi) catalyst exhibited remarkable activity selectivity glycollic acid (GA) production electrocatalytic waste polymer‐derived ethylene glycol oxidation reaction (EGOR). With mass 5.2 A mg Pt −1 Faradaic efficiency (FE) GA 95 %, it outperformed most previously reported electrocatalysts selective production. lattice‐compensation effect promotes homogeneity Fe actives sites, facilitating co‐adsorption EG OH reducing energy barriers dehydrogenation OH‐combination processes. This approach effectively avoids formation low‐active sites commonly encountered HEA solid solutions, offering promising avenue exploring complex interplay between catalytic HEI structures.

Language: Английский

Medium entropy-derived flower-like FeCeCu nanozyme with excellent oxidase-like activity for on-site and visual detection of carbosulfan

Analytica Chimica Acta, Journal Year: 2024, Volume and Issue: unknown, P. 343566 - 343566

Published: Dec. 1, 2024

Language: Английский