Electrocatalytic nitrate reduction using Fe0/Fe3O4 nanoparticles immobilized on nickel foam: Selectivity and energy consumption studies

Jonoush, Zohreh Akbari; Rezaee, Abbas; Ghaffarinejad, Ali

doi:10.1016/j.jclepro.2019.118569

Cited by 95 publications

(36 citation statements)

References 58 publications

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“…For the three electrodes, an oxidation peak (-0.25 V) and reduction peak (-1.2 V) are associated to the oxidation and reduction of iron species contained in Fe3O4 as previously reported in literature [32][33][34].…”

Section: Electrochemical Characterization Of the Nano-enabled Electrodessupporting

confidence: 74%

Effect of surface functionalization of Fe3O4 nano-enabled electrodes on the electrochemical reduction of nitrate

Marcos-Hernández

Cerrón-Calle

et al. 2022

Separation and Purification Technology

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Section: Electrochemical Characterization Of the Nano-enabled Electrodessupporting

confidence: 74%

Effect of surface functionalization of Fe3O4 nano-enabled electrodes on the electrochemical reduction of nitrate

Marcos-Hernández

Cerrón-Calle

et al. 2022

Separation and Purification Technology

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“…Considerable recent effort has been paid on earth‐abundant transition metal oxides (TMOs) to catalyze the eNO 3 RR. [ 25–32 ] Among such TMOs, spinel‐type oxides (AB 2 O 4 ) have advantages of versatility, flexible ion arrangement, multivalence structure, and higher electronic conductivity, [ 33–35 ] providing great promise as efficient eNO 3 RR catalysts. Recent studies show that Co 3 O 4 is active for electrocatalytic NO 3 − ‐to‐NH 3 conversion but suffers from low NH 3 yields.…”

Section: Introductionmentioning

confidence: 99%

Ambient Ammonia Synthesis via Electrochemical Reduction of Nitrate Enabled by NiCo₂O₄ Nanowire Array

Liu

Xie

Liang

et al. 2022

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NiCo2O4 nanowire array on carbon cloth (NiCo2O4/CC) is proposed as a highly active electrocatalyst for ambient nitrate (NO3−) reduction to ammonia (NH3). In 0.1 m NaOH solution with 0.1 m NaNO3, such NiCo2O4/CC achieves a high Faradic efficiency of 99.0% and a large NH3 yield up to 973.2 µmol h−1 cm−2. The superior catalytic activity of NiCo2O4 comes from its half‐metal feature and optimized adsorption energy due to the existence of Ni in the crystal structure. A Zn‐NO3− battery with NiCo2O4/CC cathode also shows a record‐high battery performance.

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“…Gas chromatography was conducted to track the amount of N 2 (Fuli GC-9790, China). Additionally, the indophenol blue method was used to detect the concentration of NH 4 removal and the selectivity of NH 4 + ( + S NH 4 ) were obtained by36,37…”

mentioning

confidence: 99%

Synergistic Effect of Co(III) and Co(II) in a 3D Structured Co₃O₄/Carbon Felt Electrode for Enhanced Electrochemical Nitrate Reduction Reaction

et al. 2021

ACS Appl. Mater. Interfaces

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As nitrate contamination causes serious environmental problems, it is necessary to develop stable and efficient electrocatalysts for efficient electrochemical nitrate reduction reaction (ENRR). Here, a nonprecious Co 3 O 4 /carbon felt (CF) electrode with a 3D structure was prepared by integrating electrodeposition with calcination methods. This 3D structured Co 3 O 4 /CF electrode exhibits a high-rate constant of 1.18 × 10 −4 s −1 cm −2 for the ENRR, surpassing other Co 3 O 4 electrodes in previous literature. Moreover, it also has an excellent stability with a decrease of 6.4% after 10 cycles. Density functional theory calculations, electron spin resonance analysis, and cyclic voltammetry were performed to study the mechanism of the ENRR on the Co 3 O 4 /CF electrode, proving that atomic H* (indirect pathway) plays a prominent role in NO 3 − reduction and clarifying the synergistic effect of Co(III) and Co(II) in the Co(II)−Co(III)−Co(II) redox cycle for the ENRR: Co(III) prefers the adsorption of NO 3 − and Co(II) favors the production of H*. Based on this synergy, a relatively large amounts of Co(II) on the surface of the Co 3 O 4 /CF electrode (1.3 Co(II)/Co(III) ratio) was maintained by controlling the temperature of calcination to 200 °C with a lower energy barrier of H* formation of 0.46 eV than other ratios, which is beneficial for forming H* and enhancing the performance of the ENRR. Thus, this study suggests that building 3D structure and optimizing Co(II)/Co(III) ratio are important for designing efficient Co 3 O 4 electrocatalyst for ENRR. KEYWORDS: electrochemical nitrate reduction reaction, 3D structure, Co 3 O 4 /carbon felt electrode, high-rate nitrate removal, atomic H*, synergistic effect, Co(II)−Co(III)−Co(II) redox cycle

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Electrocatalytic nitrate reduction using Fe0/Fe3O4 nanoparticles immobilized on nickel foam: Selectivity and energy consumption studies

Cited by 95 publications

References 58 publications

Effect of surface functionalization of Fe3O4 nano-enabled electrodes on the electrochemical reduction of nitrate

Effect of surface functionalization of Fe3O4 nano-enabled electrodes on the electrochemical reduction of nitrate

Ambient Ammonia Synthesis via Electrochemical Reduction of Nitrate Enabled by NiCo₂O₄ Nanowire Array

Synergistic Effect of Co(III) and Co(II) in a 3D Structured Co₃O₄/Carbon Felt Electrode for Enhanced Electrochemical Nitrate Reduction Reaction

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Electrocatalytic nitrate reduction using Fe0/Fe3O4 nanoparticles immobilized on nickel foam: Selectivity and energy consumption studies

Cited by 95 publications

References 58 publications

Effect of surface functionalization of Fe3O4 nano-enabled electrodes on the electrochemical reduction of nitrate

Effect of surface functionalization of Fe3O4 nano-enabled electrodes on the electrochemical reduction of nitrate

Ambient Ammonia Synthesis via Electrochemical Reduction of Nitrate Enabled by NiCo2O4 Nanowire Array

Synergistic Effect of Co(III) and Co(II) in a 3D Structured Co3O4/Carbon Felt Electrode for Enhanced Electrochemical Nitrate Reduction Reaction

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Product

Resources

About

Ambient Ammonia Synthesis via Electrochemical Reduction of Nitrate Enabled by NiCo₂O₄ Nanowire Array

Synergistic Effect of Co(III) and Co(II) in a 3D Structured Co₃O₄/Carbon Felt Electrode for Enhanced Electrochemical Nitrate Reduction Reaction