Electrochemical synthesis of ammonia from water and nitrogen catalyzed by nano-Fe2O3 and CoFe2O4 suspended in a molten LiCl-KCl-CsCl electrolyte

Kim, Kwiyong; Yoo, Chung‐Yul; Kim, Jong‐Nam; Yoon, Hyung Chul; Han, Jong‐In

doi:10.1007/s11814-016-0086-6

Cited by 34 publications

(20 citation statements)

References 26 publications

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“…Kim et al . performed electrochemical synthesis of ammonia in molten LiCl‐KCl‐CsCl electrolyte by a mixture of catalysts as nano‐Fe 2 O 3 and CoFe 2 O 4 . Their maximum formation rate was 3 × 10 −10 mol/s cm 2 where they used water and nitrogen for the reaction.…”

Section: Introductionmentioning

confidence: 99%

Performance assessment of electrochemical ammonia synthesis using photoelectrochemically produced hydrogen

Biçer

Dinçer

2017

Int J Energy Res

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Summary In this study, an effective hydrogen production for electrochemical ammonia synthesis is performed using a photoelectrochemical hydrogen production reactor. A photoelectrochemical cell is built by electrodepositing photosensitive Cu2O particles on a cathode stainless steel plate. The produced hydrogen is supplied to a molten salt electrolyte‐based electrochemical ammonia synthesis reactor at ambient pressure where nitrogen gas is co‐supplied from a nitrogen tank. Using photoelectrochemically produced hydrogen, the electrochemical synthesis of ammonia is successfully accomplished. The reactions of nitrogen and hydrogen gases occur in a molten salt ambient consisting of molten hydroxides (NaOH and KOH), whereas the reaction temperature is varied in the range of 180°C to 260°C to investigate the impact of temperature on the performance. The porous nickel‐meshed electrodes with an effective area of 25 cm2 are used as cathode and anode. The hydrogen production process is characterized under both concentrated light and non‐concentrated light conditions. The maximum Coulombic efficiency for ammonia synthesis is calculated to be 14.2% with an ammonia production rate of 4.41 × 10−9 mol/s cm2 via nano‐Fe3O4 catalyst. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Performance assessment of electrochemical ammonia synthesis using photoelectrochemically produced hydrogen

Biçer

Dinçer

2017

Int J Energy Res

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“…Murakami et al systematically investigated the influence of Li 3 N on the faradaic efficiency and formation rate for ammonia synthesis in KCl-LiCl-CsCl molten http://engine.scichina.com/doi/10.1016/j.jechem.2019.09.006 salt [32] . In the absence of Li 3 N, the faradaic efficiency and formation rate of ammonia are only 0.14% and 1.78 × 10 −10 mol s −1 cm −2 , respectively [47] . After addition of 0.5 wt% Li 3 N, the faradaic efficiency and ammonia formation rate are 23% and 2.0 × 10 −8 mol s −1 cm −2 , respectively (as shown in Fig.…”

Section: The Critical Role Of LI 3 Nmentioning

confidence: 96%

Electrochemical synthesis of ammonia in molten salts

Yang

Weng

Xiao

2020

Journal of Energy Chemistry

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“…Such processes include biological nitrogen fixation, 5 ultraviolet promotion of N 2 , 6 and electrochemical nitrogen reduction. [7][8][9][10][11] For the industrial Haber-Bosch process, iron and ruthenium are commonly studied [12][13][14] because transition metals readily adsorb and release oxygen. 15 Catalysts studied for the electrochemical process include ruthenium, iron oxides, and nitride compounds.…”

Section: Introductionmentioning

confidence: 99%

“…15 Catalysts studied for the electrochemical process include ruthenium, iron oxides, and nitride compounds. 7,9,10,16 Osmium and platinum have also been identified as good catalysts. 17,18 Experimentally, Allagui et al found that a bimetallic PtIr nanoparticle catalyst decomposed ammonia at a 33% higher rate than platinum alone.…”

Section: Introductionmentioning

confidence: 99%

Comparing B3LYP and B97 dispersion-corrected functionals for studying adsorption and vibrational spectra in nitrogen reduction

Grossman

Daramola

Botte

2020

Preprint

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Electrochemical ammonia synthesis is being actively studied as a low temperature, low pressure alternative to the Haber-Bosch process. This work studied iridium as the electrochemical catalyst, following a previous study of adsorption characteristics on platinum. The characteristics studied include bond energies, bond lengths, spin densities, and free and adsorbed vibrational frequencies for the molecules N2, N, NH, NH2, and NH3. Overall, these descriptive characteristics explore the use of dispersioncorrected Density Functional Theory methods that can model N2 adsorption-the key reactant for electrochemical ammonia synthesis via transition metal catalysis. Specifically, three methods were tested: hybrid B3LYP, a dispersion-corrected form B3LYP-D3, and semi-empirical B97-D3. The latter semi-empirical method was explored to increase the accuracy obtained in vibrational analysis as well as reduce computational time. Two lattice surfaces, (111) and (100), were compared. The adsorption energies are stronger on (100) and follow the trend EB3LYP > EB3LYP-D3 > EB97-D3 on both surfaces.

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Electrochemical synthesis of ammonia from water and nitrogen catalyzed by nano-Fe2O3 and CoFe2O4 suspended in a molten LiCl-KCl-CsCl electrolyte

Cited by 34 publications

References 26 publications

Performance assessment of electrochemical ammonia synthesis using photoelectrochemically produced hydrogen

Performance assessment of electrochemical ammonia synthesis using photoelectrochemically produced hydrogen

Electrochemical synthesis of ammonia in molten salts

Comparing B3LYP and B97 dispersion-corrected functionals for studying adsorption and vibrational spectra in nitrogen reduction

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