Precise Synthesis of Dual-Atom Catalysts for Better Understanding the Enhanced Catalytic Performance and Synergistic Mechanism

Accounts of Chemical Research, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

ConspectusDual-atom catalysts (DACs), featuring two catalytic sites in close proximity, have emerged as a new frontier energy-related catalysis. Compared with single-atom (SACs), DACs more space to optimize the performance by changing dual-atom and their coordination environments. Through adjusting compositions environments of metal DACs, it is possible finely tune electronic geometric properties active centers, then synergistic effects for facilitating substrates activation intermediates stabilization can be strengthened or optimized, consequently tailoring diverse reaction pathways achieving various challenging reactions. The most important yet task studies precise synthesis which crucial understand relationship between structure at atomic level. In cases, were synthesized via pyrolysis mixture salts organic ligands, metals are randomly distributed was difficult control M···M distance (M = ion) uniform dispersion DACs. Hence, developing innovative strategies definite structures high-efficiency urgently needed.In this Account, we tentatively summarize applications conversion small molecules such H2O, CO2, so on. Focusing on three types been put forward systematically introduced. Based strategies, resulting high purity synergistically activating converting concurrently discussed, including cleavage C-C bonds, reduction CO2 Attempts made explain why these functions much higher than what SACs achieved. Efforts revealing influences dual-metal site types, separations dual metals, geometry configurations environments, well ligand performance. Emphasis has placed analysis structure-reactivity mechanism molecular Finally, perspectives current challenges future development forward. We anticipate believe that Account will provide profound insights into structurally defined give

Language: Английский

---

Artificial Photothermal Synthesis of Hydrocarbons from CO₂ and H₂O

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Abstract The excessive release of CO 2 from fossil fuel combustion has disrupted the carbon cycle, leading to elevated greenhouse gas levels. Converting into value‐added chemicals like CH 4 and C H not only offers a sustainable alternative fuels but also helps mitigate emissions. However, producing high‐energy hydrocarbons involves complex electron proton coupling, presenting significant kinetic challenges. Photothermal catalysis, which harnesses solar energy in light heat, emerges as promising method for efficient conversion hydrocarbons. This process reduces thermodynamic barriers protonation by enabling rapid transfer through thermal assistance. development photothermal catalysts capable absorbing light, generating electron–hole pairs, facilitating redox reactions is crucial enhancing efficiency selectivity. review highlights importance catalyst design, reaction conditions, reactor configuration, addresses lack comprehensive reviews on synergistic approach catalysis. By focusing precise design photogenerated heat mechanisms, this aims advance field, emphasizing its potential promote carbon‐neutral future.

Language: Английский

---

Nitrogen-Doped Co₃O₄@Porous Carbon Derived from Metal–Organic Frameworks for High-Performance Lithium Ion Batteries

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

Published: April 24, 2025

A novel 3D metal-organic framework (CUST-705) was successfully constructed through a mixed-ligand strategy under solvothermal conditions. The synthesized employed as template to prepare nitrogen-doped porous cobalt tetraoxide carbon, named Co3O4@N-C. Among the derived materials, Co3O4@N-C-700 demonstrated most promising performance and underwent comprehensive evaluation an anode in lithium-ion batteries, delivering high specific capacity of 850 mA h/g current density 0.1 A/g. After 100 charge-discharge cycles, retained discharge 944 h/g, with its retention ratio reaching 90.87%. This outcome highlights exceptional long-term cycling durability. study confirms substantial potential Co3O4@N-C component for battery systems. It further indicates material's applicability various energy storage technologies, showcasing adaptability future high-performance devices.

Language: Английский

---

Enhancing CO2 photoreduction efficiency via direct Z-scheme CuS/NH2-UiO-66 heterojunction with high selectivity of CO2 to CO

Journal of Solid State Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 125398 - 125398

Published: April 1, 2025

Language: Английский

---

Engineering Local Coordination and Electronic Structures of Dual-Atom Catalysts

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Heterogeneous dual-atom catalysts (DACs), defined by atomically precise and isolated metal pairs on solid supports, have garnered significant interest in advancing catalytic processes technologies aimed at achieving sustainable energy chemical production. DACs present board opportunities for atomic-level structural property engineering to enhance performance, which can effectively address the limitations of single-atom catalysts, including restricted active sites, spatial constraints, typically positive charge nature supported single species. Despite rapid progress this field, intricate relationship between local atomic environments behavior dual-metal sites remains insufficiently understood. This review highlights recent major challenges field. We begin discussing modulation coordination electronic structures its impact performance. Through specific case studies, we demonstrate importance optimizing entire ensemble achieve efficient, selective, stable performance both model industrially relevant reactions. Additionally, also outline future research directions, emphasizing synthesis, characterization, practical applications, aiming fully unlock potential these advanced catalysts.

Language: Английский

---

Graphene-Based Organic Semiconductor Film for Highly Selective Photocatalytic CO2 Reduction

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(9), P. 677 - 677

Published: April 29, 2025

Mimicking artificial photosynthesis utilizing solar energy for the production of high-value chemicals is a sustainable strategy to tackle fossil fuel-based crisis and mitigate greenhouse effect. In this study, we developed two-dimensional (2D) graphene oxide (GO)–diketopyrrolopyrrole (DPP) film photocatalyst. GO nanosheets facilitate uniform dispersion DPP nanoparticles (~5 nm) while simultaneously constructing an efficient charge transport network carrier recombination. Under visible-light irradiation in aqueous solution without sacrificial agents, optimized GO–DPP50 catalyst exhibited exceptional performance, achieving CO rate 32.62 μmol·g⁻1·h⁻1 with nearly 100% selectivity. This represents 2.77-fold 3.28-fold enhancements over pristine (8.65 μmol·g−1·h−1) bare (7.62 μmol·g−1·h−1), respectively. Mechanistic analysis reveals synergistic mechanism. The 2D framework not only serves as high-surface-area substrate anchoring, but also substantially suppresses recombination through rapid electron channels. Concurrently, uniformly distributed improve absorption efficiency effective photogenerated excitation. work establishes novel paradigm integration nanomaterials organic semiconductors, providing critical design principles developing high-performance film-based photocatalysts selectivity control CO2 reduction applications.

Language: Английский

---

Advancing water treatment: The emerging role of NIR-driven BiO2−x catalysts

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 350, P. 127900 - 127900

Published: May 10, 2024

Language: Английский

---

Incorporation of a Binuclear Cobalt Complex into MOFs for Photocatalytic CO₂ Reduction with H₂O as an Electron Donor

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(46), P. 22033 - 22039

Published: Nov. 8, 2024

The development of molecular composite photocatalysts for cost-effective, sacrificial-reagent-free CO2 reduction is desirable but challenging. Herein, we employed an in situ encapsulation strategy to encapsulate the binuclear cobalt complex (Co2L) within NH2-MIL-125 and synthesized a range MOF-based composites with varying content photocatalytic reduction. results showed that catalytic performance increased increase Co2L content, reaching rapid CO generation rate 27.95 μmol·g–1·h–1, over 5 times bare NH2-MIL-125, water as electron donor instead any organic sacrificial agent. This catalyst effectively harnesses advantages both catalysts MOFs, leveraging superior activity while also capitalizing on light absorption oxidation capabilities resulting remarkable ability mechanism involving transfer activation has been revealed by photoluminescence spectroscopy, X-ray photoelectron diffuse reflectance infrared Fourier transform other control experiments.

Language: Английский

---

Asymmetric Charge Distribution in One‐dimensional Metal‐Organic Assemblies to Promote Photocatalytic Hydrogen Evolution

ChemSusChem, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 19, 2024

Abstract The local charge distribution of photocatalyst is crucial to the catalytic activity due its influence on separation process. Herein, we report two one‐dimensional Ni‐based metal‐organic assemblies for efficient photocatalytic hydrogen evolution without using noble‐metal cocatalysts. By adjusting aromatic ring in center tricarboxylic ligand, was increased from 1715 2652 μmol h −1 g . detailed mechanism study shows that introduced nitrogen atoms ligands coordination assembly could modulate distribution, and yielding a significant enhancement molecular dipole moment which engenders propulsive force effective transport photoinduced carriers. This work provides insights into via ligand modulation enhancing photocatalysts.

Language: Английский

---

Atomically Fe(Ⅲ) Anchored Metal-Organic Frameworks-based Fluorescent Nanozyme for Smartphone-Adopted Chemiluminescence-Fluorescence Dual-Mode Analysis of Uric Acid

Analytica Chimica Acta, Journal Year: 2024, Volume and Issue: 1330, P. 343286 - 343286

Published: Sept. 28, 2024

Language: Английский

---