Carbon Nanocage Confining CuCo Bimetallic Interface with Low Nitrate Adsorption Energy for Highly Efficient Electrochemical Ammonia Synthesis DOI
Jun Cheng,

Guorun Dai,

Weifu Sun

et al.

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(3), P. 2501 - 2510

Published: Jan. 11, 2024

This work aimed to improve the Faraday efficiency and formation rate of ammonia with a low reaction potential in electroreduction nitrate. For this purpose, CuCo bimetallic interface-rich catalysts confined porous nitrogen-doped carbon nanocages (CuCo/NC) were designed. Results situ Fourier transform infrared spectroscopy suggested that path followed sequence NO3– → *NO3 *NO2 *NO *NOH *NH2OH *NH3 NH3. Density functional theory calculations revealed adsorption nitrate over interface was thermodynamically favorable. changed rate-determining step reduction at Cu sites from hydrogenation promoted continuous nitrogen-related intermediates. Over CuCo/NC catalyst, 95.1% (at −0.59 V vs reversible hydrogen electrode (RHE)) 9110.8 μg h–1 mgcat.–1 −0.79 RHE), which higher than those Cu/NC Co/NC catalysts.

Language: Английский

Defect-rich Cu@CuTCNQ composites for enhanced electrocatalytic nitrate reduction to ammonia DOI
Na Zhou, Jiazhi Wang, Ning Zhang

et al.

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2023, Volume and Issue: 50, P. 324 - 333

Published: July 1, 2023

Language: Английский

Citations

26
Fe and Cu Double-Doped Co3O4 Nanorod with Abundant Oxygen Vacancies: A High-Rate Electrocatalyst for Tandem Electroreduction of Nitrate to Ammonia DOI

Maosen Song,

Yuxuan Xing, Yudong Li

et al.

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(40), P. 16641 - 16651

Published: Sept. 22, 2023

The electrochemical nitrate reduction reaction (NO3RR) is an attractive green alternative to the conventional Haber-Bosch method for synthesis of NH3. However, this a tandem process that involves multiple steps electrons and protons, posing significant challenge efficient Herein, we report high-rate NO3RR electrocatalyst Fe Cu double-doped Co3O4 nanorod (Fe1/Cu2-Co3O4) with abundant oxygen vacancies, where preferentially catalyzes rapid conversion NO3- NO2- vacancy in substrate can accelerate In addition, introduction efficiently capture atomic H* promotes dynamics NH3, improving Faradaic efficiency produced Controlled experimental results show optimal Fe1/Cu2-Co3O4 exhibits good performance high (93.39%), (98.15%), ammonia selectivity (98.19%), which significantly better than other Co-based materials. This work provides guidance rational design high-performance catalysts.

Language: Английский

Citations

24
Enhanced electrochemical nitrate reduction on copper nitride with moderate intermediates adsorption DOI
Jinshan Wei, Gan Ye,

Hexing Lin

et al.

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 670, P. 798 - 807

Published: May 14, 2024

Language: Английский

Citations

15
A Cu–Co3O4 Tandem Catalyst for Efficient Electrocatalytic Nitrate Reduction at Low Concentration DOI

Junchao Yu,

Zichao Xi,

Jinhui Su

et al.

ACS Materials Letters, Journal Year: 2024, Volume and Issue: 6(7), P. 2591 - 2598

Published: May 28, 2024

Electrocatalytic reduction of nitrate (NO3–) in waste streams to valuable ammonia under ambient conditions is a green route for remediation. However, efficient catalysts are required this multistep proton coupled electron transfer reaction. This work presented tandem catalyst composed N-doped carbon layer coated Co3O4 with CuOx as highly and selective electrocatalyst NO3– NH3 at low onset potential. The catalysis → NO2– over the two synergistical sites situ generated metallic Cu was verified by experiments theoretical calculations. Benefiting from active sites, exhibited an yield rate 3.23 mg h–1 cm–2 Faradaic efficiency 93.77% ultralow potential −0.1 V versus RHE. opens new avenue design electrocatalytic reduction.

Language: Английский

Citations

14
Core–Shell Engineering Boosted Active Hydrogen Generation in Cu2–xS/MoS2 Quantum Dots for Efficient Electrocatalytic Nitrate Reduction to Ammonia DOI

Tianyao Jiang,

Yanhong Liu, Dongxu Zhang

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(15), P. 5979 - 5990

Published: April 1, 2024

The electrochemical nitrate reduction reaction (NO3RR) emerges as a promising method for ammonia (NH3) production, which faces the dilemma of inhibiting hydrogen evolution (HER) and promoting active (Hads) supply hydrogenation nitrogen intermediates. Here, core–shell structure engineering strategy is developed Cu2–xS/MoS2, where strong Hads adsorption storage capacity can accelerate As result, an eminent NH3 yield 0.178 mmol h–1 cm–2 Faradaic efficiency 84.5% were achieved. A series tests demonstrate that tuning Cu2–xS/MoS2 interface improve activity conversion NO2–, while avoiding HER effectively retain Hads. density functional theory calculation further demonstrates has *H retention ability to promote NO3RR process. This work offers novel perspective on manipulation generation NO3RR.

Language: Английский

Citations

11
Surface Structure Reformulation from CuO to Cu/Cu(OH)2 for Highly Efficient Nitrate Reduction to Ammonia DOI Creative Commons
Jin Li,

Qiuling Jiang,

Xiujing Xing

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(38)

Published: Aug. 9, 2024

Abstract Electrochemical conversion of nitrate (NO 3 − ) to ammonia (NH is a potential way produce green NH and remediate the nitrogen cycle. In this paper, an efficient catalyst spherical CuO made by stacking small particles with oxygen‐rich vacancies reported. The yield Faraday efficiency are 15.53 mg h −1 cat 90.69%, respectively, in neutral electrolyte at voltage ‐0.80 V (vs. reversible hydrogen electrode). high activity electrodes results from changes phase structure during electrochemical reduction. Structurally, there shift dense accumulation layered network uniform distribution stacked on top each other, thus exposing more active sites. Furthermore, terms phase, electrode transitions Cu/Cu(OH) 2 . Density functional theory calculations showed that Cu(OH) formation enhances NO ‐ adsorption. Meanwhile, can inhibit competing evolution reaction, while Cu (111) crystal surfaces facilitates hydrogenation reaction. synergistic effect between two promotes Therefore, study provides new idea direction for Cu‐based oxides electrocatalytic production.

Language: Английский

Citations

11
Theory-guided construction of Cu-O-Ti-Ov active sites on Cu/TiO2 catalysts for efficient electrocatalytic nitrate reduction DOI

Yifei Nie,

Hongping Yan, Suwei Lu

et al.

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Journal Year: 2024, Volume and Issue: 59, P. 293 - 302

Published: April 1, 2024

Language: Английский

Citations

10
Metal/covalent-organic framework-based electrocatalysts for electrochemical reduction of nitrate to ammonia DOI Creative Commons
Tarekegn Heliso Dolla, Boying Zhang, Thabo Matthews

et al.

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 518, P. 216061 - 216061

Published: July 8, 2024

The pervasive contamination of industrial, domestic, and agricultural wastewater with nitrate poses profound ecological public health risks. Traditional methods for remediating nitrate-laden water face formidable challenges due to its high solubility stability. However, a promising solution emerges in the form electrochemical reduction (eNO3RR), offering both efficient removal valuable ammonia generation sustainable manner. This review explores burgeoning field eNO3RR, focusing on recent advancements utilizing porous crystalline framework materials − metal–organic frameworks (MOFs) covalent-organic (COFs) as novel class electrocatalysts. These innovative exhibit unique properties such adjustable porosity, diverse structures, tunable pore sizes, well-defined active sites, making them ideal candidates enhancing efficiency selectivity under ambient conditions. By dissecting structure–activity relationship inherent MOF/COF-based electrocatalysts, this aims provide comprehensive understanding their role driving conversion NO3− NH3. Moreover, it identifies current proposes future prospects leveraging these advanced pollutants, glimpse into greener more effective approach remediation resource recovery.

Language: Английский

Citations

10
Advances in electrocatalytic nitrate reduction to ammonia over Cu-based catalysts DOI
Zhibin Zhang, Kailun Yu, Hui Wang

et al.

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121123 - 121123

Published: Feb. 1, 2025

Language: Английский

Citations

1
Coupling Cu doping and oxygen vacancies in Co3O4for efficient electrochemical nitrate conversion to ammonia DOI
Bo Li,

Pengfei Xue,

Yu Bai

et al.

Chemical Communications, Journal Year: 2023, Volume and Issue: 59(34), P. 5086 - 5089

Published: Jan. 1, 2023

Electrochemical conversion of nitrate to NH3 not only eliminates pollution in the environment, but also produces highly valuable NH3. Herein, Cu-doped Co3O4 with abundant oxygen vacancies (Cu-Co3O4-x) was prepared on carbon cloth. The as-fabricated Cu-Co3O4-x can selectively reduce high Faraday efficiencies (around 90%) and a large yield 0.83 mmol h-1 cm-2 neutral electrolyte.

Language: Английский

Citations

21