Published: Jan. 1, 2024
Language: Английский
Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 155005 - 155005
Published: Aug. 23, 2024
Language: Английский
Citations
2
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(52)
Published: Aug. 29, 2024
Abstract Advanced oxygen reduction reaction (ORR) catalysts, integrating with well‐dispersed single atom (SA) and atomic cluster (AC) sites, showcase potential in bolstering catalytic activity. However, the precise structural modulation in‐depth investigation of their mechanisms pose ongoing challenges. Herein, a proactive lockdown strategy is introduced, relying on confinement trinuclear clusters metal exchange covalent organic polymers, enabling targeted synthesis series multicomponent ensembles featuring FeCo (Fe or Co) dual‐single‐atom ( D SA) configurations (FeCo‐ SA/AC) via thermal pyrolysis. The designed FeCo‐ SA/AC surpasses Fe‐ Co‐derived counterparts by 18 mV 49 ORR half‐wave potential, whilst exhibiting exemplary performance Zn‐air batteries. Comprehensive analysis theoretical simulation elucidate enhanced activity stems from adeptly orchestrating d z 2 ‐ xz O 2p orbital hybridization proximate to Fermi level, fine‐tuning antibonding states expedite OH* desorption OOH* formation, thereby augmenting This work elucidates synergistic potentiation active sites hybrid electrocatalysts, pioneering innovative design strategies for single‐atom‐cluster electrocatalysts.
Language: Английский
Citations
2
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Oct. 4, 2024
Abstract Pt‐based intermetallic compounds have been considered promising electrocatalysts in the practical applications of fuel cells; however, development catalysts that meet performance targets high activity, maximized stability, and low cost remains a huge challenge. Herein, an atomically ordered low‐Pt nitride (PtMn 3 N) catalyst are synthesized consisting strained Pt shell PtMn N core on carbon support via KCl‐matrix protection strategy. The represents mass activity 0.70 A mg −1 at 0.9 V specific degradation 4.2% after 5000 potential cycles for oxygen reduction reaction (ORR) rotating disk electrode (RDE) testing, which substantially outperformed commercial Pt/C (0.25 17.4%). Density functional theory calculations reveal introduction Mn elements to lattice is beneficial produce appropriate compressive strain weaken binding energy species promote strong metal‐N interactions conducive alleviating dissolution metal atoms, allowing displaying prominent durability. This work provides effective strategy N‐doped enhance corrosion resistance 3d transition metals ORR performance.
Language: Английский
Citations
2
Small, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 24, 2024
Abstract In recent years, single‐atom catalysts (SACs) with separated active centers and high atom utilization have grown significantly as a significant area of catalytic research. applications, SACs various kinds demonstrated exceptional performance, so the study mechanism provides clearer direction for preparation performance. Strong linkages between single atoms support are necessary to overcome tendency aggregate into clusters, which is called metal‐support interaction (MSI). MSI affects not only stability individual atoms, but also nature binding site applicable reactions. Therefore, investigating connection crucial. This work describes latest developments in means activity modulation catalysis. First, synthesis strategies presented, including ALD, co‐deposition, impregnation, on. Second, mechanisms realized by using loading different types supports highlighted. Third, discussed, heterojunction strategy, ligand environment dual‐single‐atom strategy. Finally, possible directions future development catalysis suggested.
Language: Английский
Citations
2
Published: Jan. 1, 2024
Language: Английский
Citations
1