Enhanced oxygen evolution reaction through improved lattice oxygen activity via carbon dots incorporation into MOFs

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 685, P. 361 - 370

Published: Jan. 19, 2025

Language: Английский

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Intramolecular electron transfer for optimized coordination environment in bimetallic molecular electrocatalysts for flexible zinc-air battery applications

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 118, P. 116335 - 116335

Published: March 21, 2025

Language: Английский

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TpPa-1/{0 1 0}-BiVO4 S-scheme heterojunction fabricated on specific crystal facets for highly efficient H2O2 artificial photosynthesis

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 154262 - 154262

Published: July 27, 2024

Language: Английский

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Engineering the Active Sites of MOF‐derived Catalysts: From Oxygen Activation to Activate Metal‐Air Batteries^†

Chinese Journal of Chemistry, Journal Year: 2024, Volume and Issue: 42(20), P. 2520 - 2535

Published: June 19, 2024

Comprehensive Summary The electrochemical processes of oxygen reduction reaction (ORR) and evolution (OER) play a crucial role in various energy storage conversion systems. However, the inherently slow kinetics reversible reactions present an urgent demand for development efficient electrocatalysts. Recently, metal‐organic framework (MOF) derivatives have attracted extensive attention electrocatalysis research due to their unique porous structure, abundant active sites, tunable structural properties. Especially, optimization electronic structure sites MOF has been proven as effective strategy enhance catalytic activity. In this review, we provide overview strategies advanced catalysts O—O bond activation reactions, including construction synergistic effects between multiple heterogeneous interfaces, utilization metal support interactions, precise modulation organic ligands surrounding at atomic level. Furthermore, review offers theoretical insights into mechanisms derivatives, well identification sites. Finally, potential challenges prospects are discussed. This contributes understanding advancement Key Scientists

Language: Английский

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Lattice Oxygen Redox Dynamics in Zeolite‐Encapsulated CsPbBr₃ Perovskite OER Electrocatalysts

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

Published: Jan. 9, 2025

Abstract Understanding the oxygen evolution reaction (OER) mechanism is pivotal for improving overall efficiency of water electrolysis. Despite methylammonium lead halide perovskites (MAPbX 3 ) have shown promising OER performance due to their soft‐lattice nature that allows lattice‐oxygen oxidation active α‐PbO 2 layer surface, role A‐site MA or X‐site elements in electrochemical reconstruction and mechanisms has yet be explored. Here, it demonstrated perovskite@zeolite composites intrinsically dominated by group lead‐halide perovskites, while type halogen crucial kinetics composites. Using CsPbBr x I 3‐ @AlPO‐5 ( = 0, 1, 2, 3) as a model catalyst, found behaves oxygen‐intercalation pseudocapacitance during surface restructuring absence halogen‐ion migration phase separation , achieving larger diffusion rate OH − within core‐shell structure. Moreover, distinct from single‐metal‐site MAPbBr @AlPO‐5, experimental theoretical investigations reveal soft lattice triggers oxygen‐vacancy‐site via /α‐PbO interface, resulting excellent performance. Owing variety easy tailoring perovskite compositions, these findings pave way development novel catalysts efficient electrocatalysis.

Language: Английский

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Regulation of eg orbital occupancy in Ni-based metal-organic frameworks for efficient hydrogen peroxide electrosynthesis

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 358, P. 124436 - 124436

Published: July 22, 2024

Language: Английский

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Revolutionizing Oxygen Evolution Reaction Catalysts: Efficient and Ultrastable Interstitial W‐Doped NiFe‐LDHs/MOFs through Controlled Topological Conversion of Metal‐Organic Frameworks

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

Published: July 18, 2024

Abstract Although metal‐organic frameworks (MOFs) show promise as electrocatalysts due to their unique intrinsic features, activity and stability often fall short. Herein, NiFe‐MOFs is used a model introduce group VIB metalates (Na 2 WO 4 , Na CrO MoO ) into the topological conversion process of layer double hydroxide (LDHs)/MOFs, creating series interstitial element‐doped LDHs/MOFs catalysts. The engage in alkaline hydrolysis MOF, generating LDHs on MOF surface. Furthermore, altering pH value reaction environment can modify catalysts' morphology, dopant/LDHs content, electronic structure. Consequently, prepared W‐doped NiFe‐LDHs/MOFs catalyst displays superior catalytic performance, with overpotentials only 250 mV at 500 mA cm −2 . Moreover, homemade anion‐exchange membrane water electrolysis (AEMWE) system featuring fabricated electrocatalyst anode operate stably for hours 1 A exceptional stem from optimized intermediate adsorption/desorption behavior nanostructure. This work not highlights potential catalysts practical applications but also offers new design approach modulating MOFs using an strategy.

Language: Английский

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FeCo-MOF-74/Mn-MOF-74 Nanocomposite as a electrocatalyst for improved oxygen evolution reaction catalytic activity

Fuel, Journal Year: 2024, Volume and Issue: 381, P. 133516 - 133516

Published: Oct. 31, 2024

Language: Английский

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Rapid Surface Reconstruction of Te-Doped NiFe Layered Double Hydroxide for Robust Oxygen Evolution at High Current Density

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(32), P. 12101 - 12112

Published: Aug. 2, 2024

Surface reconstruction generates genuine active phases under an electrochemical oxygen evolution reaction (OER); however, most OER catalysts exhibit slow self-reconstruction due to their relative stability in electrochemistry. Therefore, it is highly essential rationally design precatalysts capable of rapidly generating more species. Herein, a novel reconfigurable Te-doped NiFe layered double hydroxide (Te-NiFe LDH/NF) precatalyst prepared, which exhibits ultrafast and in-depth self-reconstruction, significantly enhancing the activity for step. By employing various in/ex situ techniques theoretical calculations, distinctive structure Te-NiFe LDH/NF along with alkaline electrolyte are identified as pivotal factors facilitating phase transition. The presence Te cations can effectively reduce energy barrier, thereby providing feasibility continuous reconstruction, while supplies complement OH– form oxyhydroxides. Besides, doped into NiFeOxHy lattice (Te-NiFeOxHy/NF), leading optimized binding energies intermediates reduced barriers rate-determining step (RDS), ultimately performance. As such, self-restructured Te-NiFeOxHy/NF only required 208 310 mV achieve 10 500 mA cm–2, respectively, together high current 300 h. This study provides rational strategy develop efficient electrocatalysts through surface reconstruction.

Language: Английский

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N‐Doped Carbon Modified (Ni_xFe_1‐x)Se Supported on Vertical Graphene toward Efficient and Stable OER Performance

Small, Journal Year: 2024, Volume and Issue: 20(46)

Published: Aug. 11, 2024

Abstract NiFe‐based nanomaterials are extensively studied as one of the promising candidates for oxygen evolution reaction (OER). However, their practical application is still largely impeded by unsatisfied activity and poor durability caused severe leaching active species. Herein, a rapid facile combustion method developed to synthesize vertical graphene (VG) supported N‐doped carbon modified (Ni x Fe 1‐x )Se composites (NC@(Ni )Se/VG). The interconnected heterostructure obtained materials plays vital role in boosting catalytic performance, offering rich sites convenient pathways electron ion transport. incorporation Se into NiFe facilitates formation species via situ surface reconstruction. According density functional theory (DFT) calculations, Ni 0.75 0.25 Se/Ni OOH layer significantly enhances NC@(Ni )Se/VG. Furthermore, surface‐adsorbed selenoxide contribute stabilization phase increase overall stability. )Se/VG exhibits low overpotential 220 mV at 20 mA cm −2 long‐term stability over 300 h. This work offers novel perspective on design fabrication OER electrocatalysts with high

Language: Английский

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