Reduction of nitric oxide at a platinum cathode in an acidic solution

Janssen, Ljj Jos; Pieterse, M.M.J.; Barendrecht, E Embrecht

doi:10.1016/0013-4686(77)85048-2

Cited by 85 publications

(49 citation statements)

References 3 publications

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“…These applications require selective NO reduction catalysts to either N 2 or NH 2 OH. Since metal catalysts are mainly selective toward N 2 O and NH 3 [2], the search for suitable catalysts continues [3,4].…”

Section: Introductionmentioning

confidence: 99%

Bioinspired electrocatalytic reduction of nitric oxide by immobilized heme groups

Groot

Merkx

Koper

2007

Comptes Rendus. Chimie

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Section: Introductionmentioning

confidence: 99%

Bioinspired electrocatalytic reduction of nitric oxide by immobilized heme groups

Groot

Merkx

Koper

2007

Comptes Rendus. Chimie

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“…Three different ways of electrocatalytic reduction of nitrates are known [5]: (i) addition of electrocatalytically active ions such as VO 3 ) , MoO 4 2) , WO 4 2) or cobalt complexes [22] directly to the treated solution (ii) immobilization of the catalyst on the cathode surface, for example, carbon electrode modified with phthalocyanine complexes [23] and (iii) electrocatalytic reduction on solid electrodes [15][16][17][18][19][20][21]. Many solid electrodes have been tested including Pb [18,19,24], Ni [18,19,24,25], Fe [19,24], Cu [15,23,25,26], Pt [16,27,28], Zn [29], Ru [30], Pd [26,30,31], C [21,24,25] and Ir [16,30].…”

Section: Introductionmentioning

confidence: 99%

“…Electrocatalytic processes have been extensively studied in the last 30 years [15][16][17][18][19][20][21]. Three different ways of electrocatalytic reduction of nitrates are known [5]: (i) addition of electrocatalytically active ions such as VO 3 ) , MoO 4 2) , WO 4 2) or cobalt complexes [22] directly to the treated solution (ii) immobilization of the catalyst on the cathode surface, for example, carbon electrode modified with phthalocyanine complexes [23] and (iii) electrocatalytic reduction on solid electrodes [15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical reduction of nitrate ion on various cathodes ? reaction kinetics on bronze cathode

2005

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The electrochemical reduction of NO 3 ) in 0.1 M K 2 SO 4 and 0.05 M KNO 3 solution was studied on various electrodes in two different cell configurations, a divided and an undivided one. The products in all cases were NO 2 ) , NH 3 , N 2 and small amounts of NO 2 and NO. The more efficient cathodes as regards the conversion of NO 3 ) to N 2 were Al and the alloy Sn85Cu15, where the selectivity for nitrogen formation was 43 and 35.3% at )1.8 and )2.0 V, respectively. The kinetic analysis of the experimental results was carried out by numerical solution of the resulted differential equations according to the scheme:The rate constants on Sn85Cu15 at )2.0 V for the above reactions were found to be k 1 ¼ 4:9 Â 10 À4 s )1 , k 2 ¼ 1:76 Â 10 À5 s )1 and k 3 ¼ 7:66 Â 10 À3 l mol )1 s )1 . At more negative potential more NO 2 ) ions reduced and converted either to N 2 or NH 3 . The rate constant of reduction of nitrate was almost the same in the region between )1.7 and )2.0 V, because the reaction is limited by the diffusion. In order to oxidize a part of the undesirable byproducts NO 2 ) and NH 3 at the anode of the cell to nitrate and nitrogen respectively, an undivided cell was used. Comparison between the two cell configurations indicated that, although in the undivided cell the % removal efficiency of nitrate was lower than that in the divided one, the selectivities of NO 2 ) and NH 3 were 4.8 and 2.2 times lower, respectively.

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“…23 This surface reaction has a rich chemistry and contains numerous reaction steps and intermediates. Thermodynamically, the most favorable product is N 2 ; in electrochemical experiments, however, other products, such as NH 4 OH + , NH 4 + , and N 2 O, 7,[9][10][11]28 are generally observed. On platinum, in particular, reductive NO stripping and NO continuous reaction have been performed on both poly 7, 10-11, 13, 28-29 and single crystalline Pt electrodes 3,9,14,[23][24]27 using cyclic voltammetry (CV).…”

Section: Introductionmentioning

confidence: 99%

Atomistic Insights into Nitrogen-Cycle Electrochemistry: A Combined DFT and Kinetic Monte Carlo Analysis of NO Electrochemical Reduction on Pt(100)

et al. 2017

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Electrocatalytic denitrification is a promising technology for the removal of NO x species in groundwater.However, a lack of understanding of the molecular pathways that control the overpotential and product distribution have limited the development of practical electrocatalysts, and additional atomic-level insights are needed to advance this field. Adsorbed NO has been identified as a key intermediate in the NO x electroreduction network, and the elementary steps by which it decomposes to NH 4 + , N 2 , NH 2 OH, or N 2 O remain a subject of debate. Herein, we report a combined Density Functional Theory (DFT) and kinetic Monte Carlo (kMC) study of this reaction on Pt(100), a catalytic surface that is known to be active for the activation of strong covalent bonds, in acidic electrolytes. This approach describes the effects of coverage-dependent adsorbate-adsorbate interactions, water-mediated protonation kinetics and thermodynamics, and transient potential sweeps, on reaction rates and selectivities. The results predict NO stripping curves in excellent agreement with experiments while, at the same time, providing a mechanistic interpretation of observed current peaks. Further, production of NH 4 + products is traced to the rapid kinetics of N-O bond breaking in reactive intermediates, while rapid hydrogenation of surface N* species prevent competing pathways from forming either N 2 or N 2 O. The combined DFT-kMC methodology thus provides a unique tool to describe the mechanism and energetics of platinum-catalyzed electroreduction in the nitrogen cycle, and this approach should also find application to related electrocatalytic processes that are of technological and environmental interest.

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Reduction of nitric oxide at a platinum cathode in an acidic solution

Cited by 85 publications

References 3 publications

Bioinspired electrocatalytic reduction of nitric oxide by immobilized heme groups

Bioinspired electrocatalytic reduction of nitric oxide by immobilized heme groups

Electrochemical reduction of nitrate ion on various cathodes ? reaction kinetics on bronze cathode

Atomistic Insights into Nitrogen-Cycle Electrochemistry: A Combined DFT and Kinetic Monte Carlo Analysis of NO Electrochemical Reduction on Pt(100)

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