Modulating electronic structures of MOF through orbital rehybridization by Cu doping promotes photocatalytic reduction of nitrate to produce ammonia

Nano Energy, Journal Year: 2024, Volume and Issue: 124, P. 109499 - 109499

Published: March 16, 2024

Language: Английский

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Novel insights for simultaneous NOx and CO Removal: Cu+-Sm3+-Ov-Ti4+ asymmetric active site promoting NH3-SCR coupled with CO oxidation reaction

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 481, P. 148534 - 148534

Published: Jan. 4, 2024

Language: Английский

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Efficient Catalytic Elimination of Chlorobenzene Based on the Water Vapor-Promoting Effect within Mn-Based Catalysts: Activity Enhancement and Polychlorinated Byproduct Inhibition

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(8), P. 3985 - 3996

Published: Feb. 15, 2024

Achieving no or low polychlorinated byproduct selectivity is essential for the chlorinated volatile organic compounds (CVOCs) degradation, and positive roles of water vapor may contribute to this goal. Herein, oxidation behaviors chlorobenzene over typical Mn-based catalysts (MnO2 acid-modified MnO2) under dry humid conditions were fully explored. The results showed that presence significantly facilitates deep mineralization restrains formation Cl2 dichlorobenzene. This remarkable vapor-promoting effect was conferred by MnO2 substrate, which could suitably synergize with postconstructed acidic sites, leading good activity, stability, desirable product distribution conditions. A series experiments including isotope-traced (D2O H218O) CB-TPO provided complete insights into direct involvement molecules in reaction attributed root cause proton-rich environment highly reactive water-source oxygen species rather than commonly assumed cleaning hydrogen proton transfer processes (generation active OOH). work demonstrates application potential CVOCs elimination practical (containing vapor) provides guidance development superior industrial catalysts.

Language: Английский

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Metal-based electrocatalysts for ammonia electro-oxidation reaction to nitrate/nitrite: Past, present, and future

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2024, Volume and Issue: 56, P. 25 - 50

Published: Jan. 1, 2024

Language: Английский

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A review on catalyst advances for photothermal dry reforming of methane reaction

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 354, P. 128799 - 128799

Published: July 14, 2024

Language: Английский

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Unveiling Mechanistic Insight into Boosting Oxygen Species Activation over CeO2/Mn2O3 p–n Heterojunction for Efficient Photothermal Mineralization of Toluene

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: unknown, P. 137423 - 137423

Published: Jan. 1, 2025

Language: Английский

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Toward Maximizing the Ag–CeO₂ Interface and Rich Oxygen Vacancies for Efficient Photocatalytic Oxidation of 5-Hydroxymethylfurfural

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

In the pursuit of high-selective oxidation 5-hydroxymethylfurfural (HMF) to valuable derivatives such as 5-hydroxymethylfuroic acid (HMFCA), 5-formyl-2-furanoic (FFCA), and furan-2,5-dicarboxylic (FDCA), we have developed a diethylenetriamine pentaacetic (DTPA)-assisted strategy construct highly effective photothermal catalyst with maximized Ag–CeO2 interfaces rich oxygen vacancies. Under optimal reaction conditions, this achieves remarkable yields 99% for HMFCA, FFCA turnover frequency (TOF) 163 h–1, 98% FDCA. Combined theoretical calculations series characterization analyses reveal that superior performance is due unique properties vacancies, which enhance electron transport synergistically catalytic activity silver clusters. contrast other photocatalytic systems HMF, work showcases high selectivity in HMF FFCA, These findings not only elucidate mechanisms behind selective but also offer promising approach directional photosynthesis high-purity chemicals related applications.

Language: Английский

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Unraveling the Lattice O Assisted Internal Selective Catalytic Reduction Mechanism on High N₂ Selectivity of CuO_x/PtCu Catalysts in NH₃-SCO

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(11), P. 7178 - 7188

Published: May 12, 2023

Supported Pt catalysts suffer from low reaction selectivity (<65% at 100% conversion) in the selective catalytic oxidation of ammonia (NH3-SCO) because their intrinsic over-oxidation tendencies. Herein, a strategy based on facilitating byproduct NOx reduction to N2 is demonstrated CuOx/PtCu catalysts, aiming tackle challenge. This PtCu alloy sample with CuOx-rich surface displays an 95%, while its turnover frequencies are highest among reported supported Pt-based catalysts. The enhanced activities and selectivities primarily attributed Pt-Cuδ+ dual-site synergies interface, which dual sites exhibit distinct NH3 adsorption, activation, dehydrogenation behaviors. Olat assisted internal mechanism N2O22– as central intermediates proposed. Density functional theory calculation temperature-programmed measurements show that N–O bond tends break simultaneously assistance Ov CuOx followed by easy transition N2, serve origin high selectivity.

Language: Английский

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Tungsten Nitride/Tungsten Oxide Nanosheets for Enhanced Oxynitride Intermediate Adsorption and Hydrogenation in Nitrate Electroreduction to Ammonia

ACS Nano, Journal Year: 2023, Volume and Issue: 17(24), P. 25091 - 25100

Published: Dec. 6, 2023

Electrochemical NO3– reduction reaction (NO3RR) is a promising technique for green NH3 synthesis. Tungsten oxide (WO3) has been regarded as an effective electrocatalyst electrochemical However, the weak adsorption and sluggish hydrogenation of oxynitride intermediates (NOx, e.g., *NO3 *NO2) over WO3 materials hinder efficiency converting to NH3. Herein, we design heterostructure tungsten nitride (WN) (WN/WO3) nanosheets optimize *NO2 adsorptions facilitate hydrogenations achieve highly efficient NO3RR produce Theoretical calculations predict that locally introducing WN into will shorten distance between adjacent W atoms, resulting in being strongly adsorbed on active sites form bidentate ligands instead relatively monodentate ligands. Furthermore, facilitates H2O dissociation supply requisite protons, which beneficial hydrogenations. Inspired by theoretical prediction, WN/WO3 are successfully fabricated through high-temperature nitridation process. The transmission electron microscopy, X-ray photoelectron spectroscopy, absorption near-edge spectroscopy investigations confirm amorphous introduced situ composite heterostructure. as-prepared exhibit high Faraday 88.9 ± 7.2% appreciable yield rate 8.4 mg h–1 cm–2 toward production, much higher than individual WN. enhanced behaviors *NOx characterized Fourier-transform infrared consistent with predictions. This work develops facile nanomaterials tune NOx boosting from

Language: Английский

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Diving into the interface-mediated Mars-van Krevelen (M−vK) characteristic of CuOx-supported CeO2 catalysts

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 342, P. 123368 - 123368

Published: Oct. 7, 2023

Language: Английский

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