Recent progress in electrocatalytic nitrogen reduction to ammonia (NRR)

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 478, P. 214981 - 214981

Published: Dec. 25, 2022

Language: Английский

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A Bi‐Co Corridor Construction Effectively Improving the Selectivity of Electrocatalytic Nitrate Reduction toward Ammonia by Nearly 100%

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(48)

Published: Sept. 22, 2023

Improving the selective ammonia production capacity of electrocatalytic nitrate reduction reaction (NO3 RR) at ambient conditions is critical to future development and industrial application electrosynthesis ammonia. However, involves multi-proton electron transfer as well desorption underutilization intermediates, posing a challenge selectivity NO3 RR. Here electrodeposition site Co modulated by depositing Bi bottom catalyst, thus obtaining Co+Bi@Cu NW catalyst with Bi-Co corridor structure. In 50 mm NO3- , exhibits highest Faraday efficiency ≈100% (99.51%), an yield rate 1858.2 µg h-1 cm-2 high repeatability -0.6 V versus reversible hydrogen electrode. Moreover, change NO2- concentration on surface observed in situ reflection absorption imaging intermediates RR process detected electrochemical Raman spectroscopy together verify trapping effect It believed that measure modulating deposition loading element easy-to-implement general method for improving NH3 corresponding scientific research applications.

Language: Английский

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Metal–support interactions for heterogeneous catalysis: mechanisms, characterization techniques and applications

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(16), P. 8540 - 8572

Published: Jan. 1, 2023

Metal–support interactions (MSIs) is essential for the understanding of structure–performance relationship and designing in heterogeneous catalysis area. This review mainly summarizes current theoretical experimental research MSIs.

Language: Английский

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Membrane electrode assembly design for lithium-mediated electrochemical nitrogen reduction

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(7), P. 3063 - 3073

Published: Jan. 1, 2023

A feasible membrane electrode assembly (MEA) configuration is proposed for lithium-mediated electrochemical nitrogen reduction to ammonia, which shows the advantages of efficient gas transfer, reduced solvent consumption and compact configuration.

Language: Английский

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Targeted C-O bond cleavage of *CH2CHO at copper active sites for efficient electrosynthesis of ethylene from CO2 reduction

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 351, P. 123992 - 123992

Published: April 24, 2024

Language: Английский

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Defective TiO_2−x for High‐Performance Electrocatalytic NO Reduction toward Ambient NH₃ Production

Small, Journal Year: 2023, Volume and Issue: 19(24)

Published: March 15, 2023

Synthesis of green ammonia (NH3 ) via electrolysis nitric oxide (NO) is extraordinarily sustainable, but multielectron/proton-involved hydrogenation steps as well low concentrations NO can lead to poor activities and selectivities electrocatalysts. Herein, it reported that oxygen-defective TiO2 nanoarray supported on Ti plate (TiO2-x /TP) behaves an efficient catalyst for reduction NH3 . In 0.2 m phosphate-buffered electrolyte, such TiO2-x /TP shows competitive electrocatalytic synthesis activity with a maximum yield 1233.2 µg h-1 cm-2 Faradaic efficiency 92.5%. Density functional theory calculations further thermodynamically faster deoxygenation protonation processes (101) compared perfect (101). And the energy barrier 0.7 eV potential-determining step highlights greatly improved intrinsic activity. addition, Zn-NO battery fabricated Zn obtain 241.7 while providing peak power density 0.84 mW

Language: Английский

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Electronic Structure Optimization and Proton-Transfer Enhancement on Titanium Oxide-Supported Copper Nanoparticles for Enhanced Nitrogen Recycling from Nitrate-Contaminated Water

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(27), P. 10117 - 10126

Published: June 26, 2023

Electrocatalytic reduction of nitrate to NH3 (NO3RR) on Cu offers sustainable production and nitrogen recycling from nitrate-contaminated water. However, affords limited NO3RR activity owing its unfavorable electronic state the slow proton transfer surface, especially in neutral/alkaline media. Furthermore, although a synchronous "NO3RR collection" system has been developed for nitrate-laden water, no is designed natural water that generally contains low-concentration nitrate. Herein, we demonstrate depositing nanoparticles TiO2 support enables formation electron-deficient Cuδ+ species (0 < δ ≤ 2), which are more active than Cu0 NO3RR. TiO2-Cu coupling induces local electric-field enhancement intensifies adsorption/dissociation at interface, accelerating Cu. With dual enhancements, delivers an NH3-N selectivity 90.5%, mass 41.4 mg-N h gCu-1, specific 377.8 h-1 m-2, minimal leaching (<25.4 μg L-1) when treating 22.5 mg L-1 NO3--N -0.40 V, outperforming most reported Cu-based catalysts. A sequential collection based was then proposed, could recycle under wide concentration window 22.5-112.5 rate 209-630 mgN m-2 h-1. We also demonstrated this collect 83.9% (19.3 lake

Language: Английский

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Synergistic effect of modified pore and heterojunction of MOF-derived α-Fe₂O₃/ZnO for superior photocatalytic degradation of methylene blue

RSC Advances, Journal Year: 2023, Volume and Issue: 13(6), P. 3818 - 3834

Published: Jan. 1, 2023

Mesoporous heterojunction MOF-derived α-Fe2O3/ZnO composites were prepared by a simple calcination of α-Fe2O3/ZIF-8 as sacrificial template. The optical properties confirm that coupling both the modified pore and n-n effectively reduces possibility photoinduced charge carrier recombination under irradiation. mesoporous Fe(25)ZnO with 25% loading α-Fe2O3 exhibited best performance in MB degradation, up to ∼100% after 150 minutes irradiation, higher than pristine ZnO α-Fe2O3. Furthermore, three cycles reusability, still showed an excellent stability 95.42% for degradation MB. proposed photocatalytic mechanism corresponds system. This study provides valuable reference preparing metal oxides system enhance photodegradation.

Language: Английский

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Boosting charge-transfer in tuned Au nanoparticles on defect-rich TiO2 nanosheets for enhancing nitrogen electroreduction to ammonia production

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 636, P. 184 - 193

Published: Jan. 5, 2023

Language: Английский

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Harmonized Physical and Electrochemical Process Design for Densely Dispersed Cu Catalysts on Cu₂O Absorbers for Efficient Photoelectrochemical CO₂ Reduction Reaction

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(10)

Published: Jan. 9, 2024

Abstract The photoelectrochemical CO 2 reduction reaction (photo‐CO RR) is a promising technology to convert into high‐value‐added carbon‐based chemicals using relatively low voltage, which can economically solve the problem of emissions. Nevertheless, unlike conventional electrochemical RR approach, photo‐CO in its initial development stage. Particularly, when sunlight applied photoelectrodes for RR, severe photocorrosion unavoidable, resulting deterioration fundamental functions including device long‐term stability and conversion performance. This study proposes an innovative two‐step catalyst formation strategy enable efficient with Cu catalysts prepared intrinsic O absorption layer. approach based on harmonized process design i) growth physically generated nanoparticles ii) construction improved cluster catalysts. vacuum‐evaporated seeds are designed induce evenly dispersed electrical path O, selectively concentrated field from provides preferential sites metallic subsequent reduction. combination demonstrates synergistic performance −1.2 mA cm −2 at 0 V RHE suppression produces ≈95% product gas (0.4 ).

Language: Английский

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