Local Electronic Structure Modulation of Interfacial Oxygen Vacancies Promotes the Oxygen Activation Capacity of Pt/Ce_1–xM_xO_2−δ

ACS Catalysis, Год журнала: 2024, Номер 14(8), С. 5936 - 5948

Опубликована: Апрель 3, 2024

The asymmetric oxygen vacancies on the surface of doped oxides and at interface between metal oxide are commonly regarded as real active sites for molecular activation reaction, owing to their unique electronic perturbation properties. However, essential rules modulating local structure promote capacity still ambiguous. In this work, a series interfacial vacancy sites, Pt/Ce–Ov–M (Ov, vacancy, M = Y, La, Pr, Nd), with different coordination environments were constructed based Pt/Ce0.95M0.05O2−δ materials. experimental data theoretical calculation results prove that site can capture electrons from Pt d-bands d- f-bands, acting an electron enrichment center. elevated d-band center upward Fermi level significantly boost transfer unoccupied π2p* orbital O2, achieving O2 through π-electron feedback mechanism. Remarkably, Pt/Ce–Ov–Y in Pt/Ce0.95Y0.05O2−δ highest delocalized density exhibited best behaviors catalytic activity aerobic oxidation 5-hydroxymethylfurfural. This work reveals over metal-oxide catalysts is highly dependent d/f-orbital valence-electron modulation, providing more insights into effect vacancy-localized performance.

Язык: Английский

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Designing efficient catalysts for electrocatalytic organic synthesis: From electronic structure to adsorption behavior

Matter, Год журнала: 2024, Номер 7(2), С. 456 - 474

Опубликована: Янв. 21, 2024

Язык: Английский

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Customizing oxygen electrocatalytic microenvironment with S, N codoped carbon nanofibers confining carbon nanocapsules and Co9S8 nanoparticles for rechargeable Zn-air batteries

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер 352, С. 124060 - 124060

Опубликована: Апрель 21, 2024

Язык: Английский

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Boosting the ORR/OER Activity of Cobalt‐Based Nano‐Catalysts by Co 3d Orbital Regulation

Small, Год журнала: 2024, Номер 20(35)

Опубликована: Апрель 2, 2024

Abstract The transition metal oxides/sulfides are considered promising catalysts due to their abundant resources, facile synthesis, and reasonable electrocatalytic activity. Herein, a significantly improved intrinsic catalytic activity is achieved for constructing Co‐based nanocrystal (Co‐S@NC) with the coordination of Co─S, Co─S─C, Co─N x ─C. calculational experimental results demonstrate that diversified chemical environment Co‐cations induces 3d orbitals high spin‐state exhibits coexistence Co 2+ fully occupied d π 3+ unpaired electrons in orbitals. diverse occupation contributes an elevated d‐band center ions, which accelerates oxygen reduction reaction evolution kinetics Co‐S@NC nanocrystal. Therefore, Li–O 2 batteries as cathode catalyst exhibit 300 cycles at current density 500 mA g −1 cut‐off capacity 1000 mAh . Moreover, ultrahigh discharge specific 34 587 obtained , corresponding energy 949 Wh kg prototype battery. study on orbital regulation nanocrystals provides innovative strategy bifunctional electrocatalysts toward practical application metal–air batteries.

Язык: Английский

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Single atom catalyst-mediated generation of reactive species in water treatment

Chemical Society Reviews, Год журнала: 2023, Номер 52(22), С. 7673 - 7686

Опубликована: Янв. 1, 2023

Unique activation mechanisms of oxidants by metal single atom catalysts for water treatment were compared with conventional advanced oxidation processes.

Язык: Английский

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Enhancing catalytic activity for toluene and acetone oxidation over ZraCo1-aOx catalysts by doping Zr to improve the oxygen activation capacity due to formation of Zr-O-Co bonds

Chemical Engineering Journal, Год журнала: 2023, Номер 465, С. 142857 - 142857

Опубликована: Апрель 11, 2023

Язык: Английский

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Recent Advancements in the Preparation and Application of Copper Single-Atom Catalysts

ACS Applied Nano Materials, Год журнала: 2023, Номер 6(7), С. 4987 - 5041

Опубликована: Март 27, 2023

Single-atom catalysts (SACs) have developed as a potential advanced variety of wherein copper SACs (Cu SACs) appeared rising star in catalysis which promising catalytic activity is achieved by well-adjusted d-band center. Herein, the most recent advancements synthesis are highlighted. Various electrocatalytic applications such carbon dioxide reduction reaction, oxygen nitrogen biotherapeutic applications, coupling reactions, hydroxylation, hydrogenation, photocatalytic and other miscellaneous reactions Cu coordinated into different supports been thoroughly reviewed, stability performance fuel cells, zinc–CO2 batteries, zinc–air batteries discussed. This review summarizes study developments SACs.

Язык: Английский

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Photo-electrochemical ep-oxidation using environmentally friendly oxidants: Overview of recent advances in efficiently designed photo-electrode

Coordination Chemistry Reviews, Год журнала: 2024, Номер 503, С. 215641 - 215641

Опубликована: Янв. 8, 2024

Язык: Английский

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Differences between atomically-dispersed and particulate Pt supported catalysts on synergistic photothermocatalytic oxidation of VOCs from cooking oil fumes

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 339, С. 123116 - 123116

Опубликована: Июль 23, 2023

Язык: Английский

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Cu/Co Bimetallic Carbon Catalyst as a Highly Efficient Promoter for Reactive Dyes Degradation with PMS

Langmuir, Год журнала: 2024, Номер 40(21), С. 11039 - 11048

Опубликована: Май 14, 2024

The synergistic effect between bimetallic catalysts has been confirmed as an effective method for activating persulfate (PMS). Therefore, we immobilized copper–cobalt on chitosan to prepare carbon PMS activation and degradation of reactive dyes. Experimental results demonstrate that the CuCo-CTs/PMS catalytic system exhibits excellent performance toward various types dyes (e.g., Ethyl violet, Chlortalidone, Di chlorotriazine), with rates reaching 90% within 30 min. CuCo-CTs exhibit high activity over a wide pH range 3–11 at room temperature under static conditions, degrading 92% RV5 60 ultraviolet–visible (UV–vis) spectroscopy color changes in dye solution confirm RV5, rate 97.2% 10 Additionally, good stability reusability, maintaining 92.8% after eight cycles. Kinetic studies indicate follows pseudo-first-order kinetics. Furthermore, based radical scavenging experiments, mechanism involves both nonradical pathways, 1O2 identified primary active species. This study provides insights experimental evidence application oxidation treatment dyeing wastewater.

Язык: Английский

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