PdMoPtCoNi High Entropy Nanoalloy with d Electron Self‐Complementation‐Induced Multisite Synergistic Effect for Efficient Nanozyme Catalysis

Advanced Science, Journal Year: 2024, Volume and Issue: 11(38)

Published: Aug. 9, 2024

Engineering multimetallic nanocatalysts with the entropy-mediated strategy to reduce reaction activation energy is regarded as an innovative and effective approach facilitate efficient heterogeneous catalysis. Accordingly, conformational entropy-driven high-entropy alloys (HEAs) are emerging a promising candidate settle catalytic efficiency limitations of nanozymes, attributed their versatile active site compositions synergistic effects. As proof nanozymes (HEzymes) concept, elaborate PdMoPtCoNi HEA nanowires (NWs) abundant sites tuned electronic structures, exhibiting peroxidase-mimicking activity comparable that natural horseradish peroxidase reported. Density functional theory calculations demonstrate enhanced electron abundance NWs near Fermi level (E

Language: Английский

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

Angewandte Chemie International Edition, 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

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Nanozyme-assisted CRISPR/Cas systems as an emerging platform for food safety applications: Recent advances

Microchemical Journal, Journal Year: 2025, Volume and Issue: unknown, P. 113270 - 113270

Published: March 1, 2025

Language: Английский

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Clarifying the Active Structure and Reaction Mechanism of Atomically Dispersed Metal and Nonmetal Sites with Enhanced Activity for Oxygen Reduction Reaction

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

Published: Dec. 24, 2024

Abstract Atomically dispersed transition metal (ADTM) catalysts are widely implemented in energy conversion reactions, while the similar properties of TMs make it difficult to continuously improve activity ADTMs via tuning composition metals. Introducing nonmetal sites into may help effectively modulate electronic structure metals and significantly activity. However, is achieve co‐existence with atoms clarify their synergistic effect on catalytic mechanism. Therefore, elucidating active within atomically metal‐nonmetal materials unveiling mechanism highly important. Herein, a novel hybrid catalyst, coexistence Co single‐atoms Co─Se dual‐atom (Co─Se/Co/NC), successfully synthesized exhibits remarkable performance for oxygen reduction reaction (ORR). Theoretical results demonstrate that Se can charge redistribution at sites. Furthermore, between single‐atom further adjust d‐band center, optimize adsorption/desorption behavior intermediates, finally accelerate ORR kinetics. This work has clearly clarified shows great potential nanomaterials storage applications.

Language: Английский

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A Review on High Entropy Alloys as Metallic Biomaterials: Fabrication, Properties, Applications, Challenges, and Future Prospects

Deleted Journal, Journal Year: 2025, Volume and Issue: unknown

Published: March 21, 2025

In recent years, designing alloys with diverse elements or high entropy (HEAs) has received significant research interest for biomedical applications, particularly bone repair techniques that use materials excellent strength and biocompatibility. This review paper transitions from the core HEA concept to factors influencing cell-material interactions. The application area Bio-HEA was not only fixed orthopaedic implants; prospects in photothermal, bioimaging, biosensors, therapeutics have also been discussed. Another focus of this is identifying suitable can elucidate reduced toxicity enhanced antimicrobial activity. Critical discussions on lowering elastic modulus bio-HEAs provided mitigate stress-shielding effect-related implant rejection. Further, corrosion wear resistance their impact cellular functions Synthesis as a bulk material nuances nanoparticle discussed along entropy-based other systems applications. further delves into composite fabrication its applicability coating material. Concepts like strength-ductility trade-off, elemental alloy composition physical properties, strengthening mechanism, single-phase stability concepts were connection Bio-HEA. concludes by present challenges limiting clinical translation HEAs exploring future in-depth directions involving computational modelling advanced manufacturing optimize further.

Language: Английский

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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

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Engineering multifunctional high-entropy oxide nanozymes for robust marine antifouling

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137604 - 137604

Published: April 1, 2025

Language: Английский

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Copper Nanoparticles Loaded on N-Doped Carbon Nanotubes with Enhanced Peroxidase-Like Performance for Gallic Acid Detection in Food

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

The accurate monitoring of gallic acid (GA) in foodstuffs is crucial for safeguarding human health. application nanozymes colorimetric assays offers a promising route assessing the GA level. However, development high-efficiency and cost-effective quick detection holds substantial challenge. In this study, copper (Cu) nanoparticles (NPs) immobilized on N-doped carbon nanotubes (NCNTs) have been prepared, exhibiting exceptional peroxidase (POD)-like activity food. anchoring Cu with NCNTs enables their excellent antioxidant capacity. Then, obtained NPs/NCNTs show remarkable POD-like catalyzing TMB oxidation, attributes long-term storage stability reproducibility. Electrochemical radical scavenging experiments reveal dual mechanism action (involving reactive oxygen species electron transfer) POD-mimicking activity. Furthermore, developed catalytic platform applied to detect actual tea samples, demonstrating high reliability potential utility food industry.

Language: Английский

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High‐Entropy Alloy Nanowires for Efficient and Durable Hydrogen Oxidation Reaction

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract High‐entropy alloy nanowires (HEA NWs) hold significant promise for achieving exceptional catalytic activity and stability, owing to their unique 1D morphology the electronic engineering potential of HEAs. However, controlled synthesis HEA NWs remains a challenge. In this work, novel wet‐chemical approach is reported ultrathin NWs, represented by PtRuNiCuPb, through an active‐hydrogen (H·)‐mediated reduction mechanism. The H· species, generated organic dehydrogenation, facilitate effective co‐reduction metal salts with differing potentials, while mild conditions ensure control toward nanowire formation. resulting PtRuNiCuPb exhibit remarkable in electrocatalytic hydrogen oxidation reaction (HOR) alkaline media, due multimetallic compositions abundant grain boundaries. At 50 mV, specific mass activities reach 8.46 mA cm −2 5.54 A mg Pt+Ru −1 , respectively, ≈11.3 14.5 times greater than those commercial Pt/C. Thanks morphology, demonstrate excellent retaining 97% initial after 20000 cycles accelerated durability testing. These findings offer promising strategy designing highly efficient durable catalysts using morphologies applications.

Language: Английский

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Recent development of nanozymes for dual and multi-mode biosensing applications in food safety and environmental monitoring: a review

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 116832 - 116832

Published: April 1, 2025

Language: Английский

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