Physical review. B./Physical review. B, Journal Year: 2024, Volume and Issue: 110(21)
Published: Dec. 2, 2024
Physical review. B./Physical review. B, Journal Year: 2024, Volume and Issue: 110(21)
Published: Dec. 2, 2024
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: June 10, 2024
Abstract The rationalization of pH‐robust catalysis is highly desired but challengeable for overall water electrolysis (WE). It requests a metal active site that can make an efficient adaption with both cathodic hydrogen and anodic oxygen evolution reactions (HER/OER). Herein, RuO 2‐x /RuSe 2 heterostructure electrocatalyst profiled interfacial Se─Ru─O bridge the splitting studies. An asymmetric bond delta‐polarization (Δp) found at bridge, including Δp > 0 Ru─O part < Ru─Se side by experiment calculation results. enlarged polarizability (Δp 0) in principle trigger lattice mediated (LOM) pathway OER; meanwhile, reduced benefit HER due to strengthened d‐p band hybridization. Resultantly, deliver ultralow overpotentials 25/10 mV Pt‐beyond 210/255 OER 10 mA cm −2 acidic/alkaline media, respectively. In especial, acidic WE be stably operated 200 h low cell voltage 1.478 V . This research clarifies polarization as criterion rational design catalysts.
Language: Английский
Citations
40npj Quantum Materials, Journal Year: 2025, Volume and Issue: 10(1)
Published: Jan. 7, 2025
Abstract Realizing the quantum anomalous Hall effect (QAHE) at high temperatures remains a significant challenge in condensed matter physics. MnBi 2 Te 4 , an intrinsic magnetic topological insulator, presents promising platform for QAHE. However, its inherent interlayer antiferromagnetic coupling hinders practical realization temperatures. In this study, we propose novel approach to achieve ferromagnetic (FM) MBT bilayer by intercalating septuple-layer of insulators XBi (X=Ge, Sn, Pb). Using first-principles calculations, demonstrate that p z orbital X atom mediates interactions between Mn atoms, enabling FM coupling. Monte Carlo simulations predict transition temperature 38 K /PbBi /MnBi heterostructure. Our band structure and analyses confirm preservation QAHE all /XBi heterostructures, while heterostructure exhibits gap 72 meV, significantly exceeding pure bilayer. Furthermore, continuum model is developed elucidate underlying mechanism nontrivial states. work provides pathway achieving bilayers, paving way high-temperature advancing development spintronic applications.
Language: Английский
Citations
0Fuel, Journal Year: 2025, Volume and Issue: 386, P. 134283 - 134283
Published: Jan. 9, 2025
Language: Английский
Citations
0Physical review. B./Physical review. B, Journal Year: 2024, Volume and Issue: 110(21)
Published: Dec. 2, 2024
Citations
0