Dual role of sulfur doping in NiCr LDH for water oxidation: Promoting surface reconfiguration and lattice oxygen oxidation

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 351, P. 123994 - 123994

Published: April 24, 2024

Language: Английский

---

Dual Doping of B and Fe Activated Lattice Oxygen Participation for Enhanced Oxygen Evolution Reaction Activity in Alkaline Freshwater and Seawater

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(37)

Published: May 6, 2024

Abstract The exploitation of highly activity oxygen evolution reaction (OER) electrocatalysts is critical for the application electrocatalytic water splitting. Triggering lattice mechanism (LOM) expected to provide a promising pathway overcome sluggish OER kinetics, however, effectively enhancing involvement remains challenging. In this study, fabrication B, Fe co‐doped CoP (B, Fe─CoP) nanofibers reported, which serve as efficient electrocatalyst through phosphorization and boronation treatment Fe‐doped Co 3 O 4 nanofibers. Experimental results combined with theoretical calculations reveal that simultaneous incorporation both B can more trigger participation in CoFe oxyhydroxides reconstructed from Fe─CoP compared incorporating only or Fe. Therefore, optimized exhibit superb low overpotentials 361 376 mV at 1000 mA cm −2 alkaline freshwater natural seawater, respectively. present work provides significant guidelines innovative design concepts development following LOM pathway.

Language: Английский

---

Enhancing Ni/Co Activity by Neighboring Pt Atoms in NiCoP/MXene Electrocatalyst for Alkaline Hydrogen Evolution

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(20)

Published: Feb. 27, 2024

Density functional theory (DFT) calculations demonstrate neighboring Pt atoms can enhance the metal activity of NiCoP for hydrogen evolution reaction (HER). However, it remains a great challenge to link and NiCoP. Herein, we introduced curvature bowl-like structure construct Pt/NiCoP interface by adding minimal 1 ‰-molar-ratio Pt. The as-prepared sample only requires an overpotential 26.5 181.6 mV accordingly achieve current density 10 500 mA cm

Language: Английский

---

Subsurface A-site vacancy activates lattice oxygen in perovskite ferrites for methane anaerobic oxidation to syngas

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: June 26, 2024

Abstract Tuning the oxygen activity in perovskite oxides (ABO 3 ) is promising to surmount trade-off between and selectivity redox reactions. However, this remains challenging due limited understanding its activation mechanism. Herein, we propose discovery that generating subsurface A-site cation (La sub. vacancy beneath surface Fe-O layer greatly improved LaFeO , rendering enhanced methane conversion 2.9-fold higher than stoichiometric while maintaining high syngas of 98% anaerobic oxidation. Experimental theoretical studies reveal absence La -O interaction lowered electron density over mobility, which reduced barrier for C-H bond cleavage promoted oxidation C-atom, substantially boosting methane-to-syngas conversion. This highlights importance cations modulating electronic state oxygen, fundamentally different from traditional scheme mainly credits B-site can pave a new avenue designing prospective catalysts.

Language: Английский

---

Fe doping regulates the surface reconstruction and activates lattice oxygen of NiCr LDH for water oxidation

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 483, P. 149383 - 149383

Published: Feb. 5, 2024

Language: Английский

---

Structure–Activity Relationships in Oxygen Electrocatalysis

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

Published: Sept. 30, 2024

Abstract Oxygen electrocatalysis, as the pivotal circle of many green energy technologies, sets off a worldwide research boom in full swing, while its large kinetic obstacles require remarkable catalysts to break through. Here, based on summarizing reaction mechanisms and situ characterizations, structure–activity relationships oxygen electrocatalysts are emphatically overviewed, including influence geometric morphology chemical structures electrocatalytic performances. Subsequently, experimental/theoretical is combined with device applications comprehensively summarize cutting‐edge according various material categories. Finally, future challenges forecasted from perspective catalyst development applications, favoring researchers promote industrialization electrocatalysis at an early date.

Language: Английский

---

Stabilizing bulk lattice oxygen via the enhancement of Ir/Ru–O bonds for stable oxidation catalysts in acidic media

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125219 - 125219

Published: March 1, 2025

Language: Английский

---

Regulating the electronic state of SnO2@NiFe-LDH heterojunction: Activating lattice oxygen for efficient oxygen evolution reaction

Fuel, Journal Year: 2024, Volume and Issue: 370, P. 131762 - 131762

Published: May 4, 2024

Language: Английский

---

Rapid Conversion from Alloy Nanoparticles to Oxide Nanowires: Strain Wave‐Driven Ru‐O‐Mn Collaborative Catalysis for Durable Oxygen Evolution Reaction

Small, Journal Year: 2024, Volume and Issue: 20(30)

Published: Feb. 22, 2024

Abstract Metal‐doped ruthenium oxides with low prices have gained widespread attention due to their editable compositions, distorted structures, and diverse morphologies for electrocatalysis. However, the mainstream challenge lies in breaking so‐called seesaw relationship between activity stability during acidic oxygen evolution reaction (OER). Herein, strain wave‐featured Mn‐RuO 2 nanowires (NWs) asymmetric Ru‐O‐Mn bonds are first fabricated by thermally driven rapid solid phase conversion from RuMn alloy nanoparticles (NPs) at moderate temperature (450 °C). In 0.5 M H SO 4 , resultant NWs display a surprisingly ultralow overpotential of 168 mV 10 mA cm –2 run stable cell voltage (1.67 V) 150 h 50 PEMWE, far exceeding IrO ||Pt/C assemble. The simultaneous enhancement both stems presence dense waves composed alternating compressive tensile ones NWs, which collaboratively activate sites faster OER. More importantly, atomic trigger dynamic regeneration via refilling vacancies oxyanions adsorbed on adjacent Mn Ru sites, achieving long‐term stability. This work opens door designing non‐precious metal‐assisted unique strains practical application commercial PEMWE.

Language: Английский

---

Strain Engineering of High-Entropy Oxides Enriches Highly Active Lattice Oxygen for Electrocatalytic Water Oxidation

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(5), P. 1739 - 1745

Published: April 2, 2024

Developing novel high-entropy oxide electrocatalysts for oxygen evolution is a promising strategy to accelerate the alkaline water electrolysis kinetics by optimizing reaction paths. Herein, we demonstrate high-strain senary (FeCoNiCrMnCu)3O4 electrocatalyst with remarkably increased highly active lattice oxygen, which follows lattice-oxygen-mediated mechanism instead of traditional adsorbate-evolution (OER). A supersmall overpotential 241.4 mV required obtain 10 mA cm–2 and considerable current retention rate 94.9% attained after continuously operating 72 h. The diffusion coefficient 1.97 × 10–14 cm2 s–1, 5.6 times larger than (FeCoNi)3O4, ensuring rapid replenishment during oxidation. OER activity surpasses those most reported spinel electrocatalysts. More impressively, assembled anion exchange membrane electrolyzer can deliver an industrial-level density 1.0 under cell voltage 1.79 V, exhibiting attractive application potential.

Language: Английский

---