Insights on catalytic mechanism of CeO2 as multiple nanozymes

Nano Research, Год журнала: 2022, Номер 15(12), С. 10328 - 10342

Опубликована: Июль 11, 2022

Язык: Английский

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Synergistic Lewis and Brønsted Acid Sites Promote OH* Formation and Enhance Formate Selectivity: Towards High‐efficiency Glycerol Valorization

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(14)

Опубликована: Фев. 15, 2024

As a sustainable valorization route, electrochemical glycerol oxidation reaction (GOR) involves in formation of key OH* and selective adsorption/cleavage C-C(O) intermediates with multi-step electron transfer, thus suffering from high potential poor formate selectivity for most non-noble-metal-based electrocatalysts. So, it remains challenging to understand the structure-property relationship as well construct synergistic sites realize high-activity high-selectivity GOR. Herein, we successfully achieve dual-high performance low potentials superior GOR by forming Lewis Brønsted acid Ni-alloyed Co-based spinel. The optimized NiCo oxide solid-acid electrocatalyst exhibits (1.219 V@10 mA/cm

Язык: Английский

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B, N Codoped Defective Reduced Graphene Oxide as a Highly Efficient Frustrated Lewis Pairs Catalyst for the Selective Hydrogenation of α,β-Unsaturated Aldehydes to Unsaturated Alcohols

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

The development of all-solid-state frustrated Lewis pairs (FLPs) metal-free hydrogenation catalysts with excellent activity and stability remains a significant challenge. In this work, B, N codoped FLPs (De-rGO-NxBy) were prepared by the strategy fabricating carbon defects heteroatom doping on surface reduced graphene oxide applied in selective α,β-unsaturated aldehydes to unsaturated alcohols. It was found that electron-rich pyridine-N (Lewis base) adjacent electron-deficient B–N acid) sites could be constructed using dicyandiamide metaboric acid as B sources, thus forming sites. More importantly, facilitate formation pyridinic-N/B–N sites, thereby improving catalytic selectivity Furthermore, situ DRIFTS DFT calculations show can efficiently activate C═O H2 molecules only 0.53 eV dissociation energy H–H bond. Also, catalyst presents performance transfer reactions cyclohexanol its derivatives hydrogen sources. This study provides new ideas for design preparation promotes green synthesis

Язык: Английский

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ZIF-90 with biomimetic Zn–N coordination structures as an effective nanozyme to mimic natural hydrolase

Nanoscale, Год журнала: 2022, Номер 14(22), С. 7985 - 7990

Опубликована: Янв. 1, 2022

Inspired by the structures of enzymes, a fast and robust strategy for generating ZIF-90 metallo-nanozymes is presented.

Язык: Английский

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Bimetallic Metal–Organic Framework Fe/Co-MIL-88(NH₂) Exhibiting High Peroxidase-like Activity and Its Application in Detection of Extracellular Vesicles

ACS Applied Materials & Interfaces, Год журнала: 2022, Номер 14(37), С. 41800 - 41808

Опубликована: Сен. 9, 2022

Metal-organic frameworks (MOFs) have many attractive features, including tunable composition, rigid structure, controllable pore size, and large specific surface area, thus are highly applicable in molecular analysis. Depending on the MOF a high number of unsaturated metal sites can be exposed to catalyze chemical reactions. In present work, we report that using both Co(II) Fe(III) prepare MIL-88(NH2) MOF, produce bimetallic conversion 3,3',5,5″-tetramethylbenzidine (TMB) color product through reaction with H2O2 at higher rate than monometallic Fe-MIL-88(NH2). The Michaelis constants (Km) catalytic for TMB 3-5 times smaller, (kcat) 5-10 those horseradish peroxidase (HRP), supporting ultrahigh peroxidase-like activity. These values also much more superior HRP-mimicking MOFs reported previously. Interestingly, coupled glucose oxidase (GOx) trigger cascade enzymatic sensitive detection extracellular vesicles (EVs), family important biomarkers. Through conjugation aptamer recognizes marker protein EV surface, help isolate EVs from biological matrices, which subsequently labeled by GOx via antibody recognition. between enables concentration as low 7.8 × 104 particles/mL. assay applied monitor secretion cultured cells successfully detect different quantities sera samples collected cancer patients healthy controls. Overall, prove Fe/Co-MIL-88(NH2) its activity biocompatibility, is valuable tool deployable clinical assays facilitate disease diagnosis prognosis.

Язык: Английский

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Co‐based Nanozymatic Profiling: Advances Spanning Chemistry, Biomedical, and Environmental Sciences

Advanced Materials, Год журнала: 2023, Номер 36(8)

Опубликована: Сен. 19, 2023

Nanozymes, next-generation enzyme-mimicking nanomaterials, have entered an era of rational design; among them, Co-based nanozymes emerged as captivating players over times. been developed and garnered significant attention the past five years. Their extraordinary properties, including regulatable enzymatic activity, stability, multifunctionality stemming from magnetic photothermal conversion effects, cavitation relaxation efficiency, made a rising star. This review presents first comprehensive profiling in chemistry, biology, environmental sciences. The begins by scrutinizing various synthetic methods employed for nanozyme fabrication, such template sol-gel methods, highlighting their distinctive merits chemical standpoint. Furthermore, detailed exploration wide-ranging applications biosensing biomedical therapeutics, well contributions to monitoring remediation is provided. Notably, drawing inspiration state-of-the-art techniques omics, analysis undertaken, employing analogous statistical methodologies provide valuable guidance. To conclude, outlook on challenges prospects presented, spanning microscopic physicochemical mechanisms macroscopic clinical translational applications.

Язык: Английский

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Interfacial engineering-induced Janus heterostructures with enhanced electronic regulation for efficient oxygen electrocatalysis in rechargeable Zn-air batteries

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 342, С. 123459 - 123459

Опубликована: Ноя. 1, 2023

Язык: Английский

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Recent progress of nanozymes with different spatial dimensions for bioanalysis

Materials Today Nano, Год журнала: 2023, Номер 22, С. 100330 - 100330

Опубликована: Март 31, 2023

Язык: Английский

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Defective nickel sulfide hierarchical structures for efficient electrochemical conversion of plastic waste to value-added chemicals and hydrogen fuel

Green Chemistry, Год журнала: 2023, Номер 25(15), С. 5979 - 5988

Опубликована: Янв. 1, 2023

Hierarchical defective nickel sulfide catalysts enable efficient electro-upcycling of plastic waste to value-added chemicals and hydrogen fuel.

Язык: Английский

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Robust Zn(II)-Organic Framework for High Catalytic Activity on Cycloaddition of CO₂ with Epoxides and Reversible Iodine Uptake

Crystal Growth & Design, Год журнала: 2023, Номер 23(7), С. 4953 - 4960

Опубликована: Июнь 2, 2023

Increasingly serious natural disasters caused by excessive CO2 emission have given birth to a series of carbon-neutral technologies, among which the chemical transformation catalyzed metal–organic framework (MOF)-based catalysts has become focus. Herein, self-assembly zinc(II) cation and designed flexible multifunctional ligand 1,3-di(5,6-dicarboxylbenzimidazol-1-ylmethyl)benzene (H4DDBB) generated highly robust microporous material {[Zn(H2DDBB)]·2NMP}n (NUC-69) with 1D rectangle open channels (10.0 × 7.6 Å2). Because inner wall voids is densely functionalized free −COOH groups, Nimidazole atoms, tetra-coordinated metal sites, activated NUC-69a exhibits high catalytic performance on cycloaddition reactions epoxides under mild conditions turnover number frequency. In addition, can be used as an efficient iodine adsorbent maximum adsorption capacity 0.94 g/g (4.26 I2 molecules per formulation unit) 1.28 (5.81 in hexane solution volatilization phase. Hence, this work provides productive insight into design MOFs enhancing types active makes developed materials broader application prospect.

Язык: Английский

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