Controlling electrocatalytic nitrate reduction efficiency by utilizing dπ–pπ interactions in parallel stacking molecular systems

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

The orientation of β-CuPc favours the overlap central Cu with N parallel molecules, which is reason behind high electrical conductivity and selectivity in NH 3 production via nitrate reduction, impossible other polymorphs.

Язык: Английский

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Spin-mediated electrocatalytic nitrate reduction to ammonia on two-dimensional transition metal borides

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159775 - 159775

Опубликована: Янв. 1, 2025

Язык: Английский

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In Situ Spectroscopic Probing of the Hydroxylamine Pathway of Electrocatalytic Nitrate Reduction on Iron‐Oxy‐Hydroxide

Small, Год журнала: 2025, Номер unknown

Опубликована: Янв. 14, 2025

Abstract Crystalline γ‐FeO(OH) dominantly possessing ─ OH terminals (𝛾‐FeO(OH) c ), polycrystalline containing multiple O, OH, and Fe pc α‐Fe 2 O 3 majorly surface are used as electrocatalysts to study the effect of on electrocatalytic nitrate reduction reaction (eNO RR) selectivity stabilization intermediates. Brunauer‐Emmett‐Teller analysis electrochemically determined area suggest a high active 117.79 m g −1 (ECSA: 0.211 cm ) for 𝛾‐FeO(OH) maximizing accessibility adsorption exhibiting selective eNO RR NH at pH 7 with yield rate 18.326 mg h −2 , >85% Faradaic efficiency (FE), least nine‐times catalyst‐recyclability. 15 N‐ D‐labeling combined in situ IR Raman studies validate ions generation nitrite hydroxyl amine A kinetic isotope (KIE) value 2.1 indicates H proton source proton‐coupled electron transfer rate‐limiting step. The rotating‐ring disk electrochemical (RRDE) subsequent Koutecký‐Levich reveal electron‐transfer constant (k) 2e‐ is 5.7 × 10 −6 s . This provides direct evidence formation dominant pathway γ‐FeO(OH).

Язык: Английский

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Advancing chlorine evolution reaction efficiency through magnetization-induced electron polarization and surface PdO exposure on ferromagnetic CNP/CC electrodes

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 105, С. 583 - 591

Опубликована: Янв. 25, 2025

Язык: Английский

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Functional Modification of Dawson‐Type Arsenomolybdate for Enhanced Ultracapacitor Performance and Nitrate‐to‐Ammonia Production

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

Abstract Polyoxometalates (POMs) are promising electrocatalysts and pseudo‐capacitive materials due to their reversible multi‐electron redox properties. In this study, Dawson‐type mono‐arsenic‐capped arsenomolybdate anchored into channels of {Cu(trz) 2 } 7 metal–organic network yielding a solution‐stable host‐guest structure, [{Cu I (trz) {As III As V Mo 4 VI 14 O 62 }] ·3H ( ), which exhibits higher conductivity specific capacity, excellent rate performance cycle stability than (biz) 9 (Hbiz) 3 1.5 18 ·2H 1 ) most reported POMs, ascribing the Faraday properties conductive network, advantages structure in surface area stability. The AC// ‐CPE device demonstrates energy density power 25.45 Wh kg −1 1991.53 W , 92.4% capacity retention after 10 000 cycles. Moreover, compound as nitrate reduction reaction (NO₃RR) electrocatalyst achieves current 150 mA cm −2 at −0.5 V, ammonia production 15.28 mg h Faradaic efficiency up 90%. Density functional theory is employed thoroughly investigate adsorption active sites detailed energetic steps corresponding overall pathway NO RR regulated by . This study reveals that encapsulating POMs clusters can increase sites, improve stability, conductivity, thereby enhancing storage catalytic activity molecular level.

Язык: Английский

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Structure Reconstruction Driven by Oxygen Vacancies Forming P-CoMoO4/Co(OH)2 Heterostructure Boosting Electrocatalytic Nitrate Reduction to Ammonia

Applied Catalysis B Environment and Energy, Год журнала: 2024, Номер unknown, С. 124837 - 124837

Опубликована: Ноя. 1, 2024

Язык: Английский

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Morphology-Dependent Enhancement of Electrocatalytic Nitrogen Reduction Activity Using Iron Phthalocyanine Nanostructures

ACS Applied Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 22, 2024

Язык: Английский

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One-step hydrothermal synthesis of oxygen vacancy-rich Boron-added Cu2Mn3O8/CeS2 in-situ grown on nickel foam as an electrocatalyst for efficient nitrogen reduction

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 180006 - 180006

Опубликована: Март 1, 2025

Язык: Английский

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Conjugated Cobalt Porphyrin Polymer for Highly Active and Selective Electrocatalytic Nitrite Reduction to Ammonia

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

Abstract Electrocatalytic nitrite (NO 2 − ) reduction RR) to ammonia (NH 3 is a promising green technology for producing NH with high efficiency. Cobalt macrocyclic complexes have attracted great interest because of their ability selectively convert NO , but suffer from low yields. Herein, cobalt porphyrin conjugated polymer on carbon nanotubes (CoPCOP@CNT) reported display exceptional RR performance large yield 133.39 mg h −1 CoP at −1.0 V and Faradaic efficiency (FE) 98.0% −0.8 V. Utilizing CoPCOP@CNT as the catalyst cathode, Zn‐NO battery exhibits remarkable power density (5.34 mW cm −2 ), open‐circuit voltage (≈1.45 V), FE (94.6%), (29.15 ). The active intermediates reaction pathways CoPCOP in process are revealed by differential electrochemical mass spectroscopy theory calculations. This work highlights potential electrocatalysts based metal porphyrins conversion nitrogenous pollutant into .

Язык: Английский

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Hierarchical porous CuFe-MOF nanostructures as dual electrocatalyst for hydrogen evolution reaction and nitrate reduction reaction

Journal of Environmental Sciences, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Язык: Английский

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