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Duarte, Hernán Antonio; Jha, K.; Weidner, John W.

doi:10.1023/a:1003459603696

Cited by 29 publications

(15 citation statements)

References 9 publications

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“…30 These techniques have provided compelling evidence that during nitrate reduction on most metals, including Pt, no gases are released, NH 4 + being the only product detected on a short timescale 30,38 . Electrolysis over longer time spans -mimicking the actual conditions of large-scale denitrification -often 35 produces a mixture of products 30 50 interest in relation to the electrochemical treatment of low-level nuclear wastes [68][69][70][71] , which will be discussed in a later section. Fundamental studies have shown that the most active catalysts under alkaline conditions (Cu 72 and Rh 64,73 ) are unable to select N 2 as main product, NO 2 − and NH 3 predominating at different 55 potentials.…”

Section: Fig2mentioning

confidence: 99%

Powering denitrification: the perspectives of electrocatalytic nitrate reduction

Duca

Koper

2012

Energy Environ. Sci.

539

439

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Section: Fig2mentioning

confidence: 99%

Powering denitrification: the perspectives of electrocatalytic nitrate reduction

Duca

Koper

2012

Energy Environ. Sci.

539

439

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“…concentration of as low as 9 mg dm -3 (80 μM Cr) in the electrolyte has been shown to be enough to form a chromium hydroxide film that hindered the reduction of nitrate and nitrite [14].…”

Section: Current Efficiency For Hydrogen Evolution At Low Chromate Comentioning

confidence: 99%

On the suppression of cathodic hypochlorite reduction by electrolyte additions of molybdate and chromate ions

Gustavsson¹,

Li²,

Hummelgård³

et al. 2012

J. Electrochem. Sci. Eng.

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The goal of this study was to gain a better understanding of the feasibility of replacing Cr(VI) in the chlorate process by Mo(VI), focusing on the cathode reaction selectivity for hydrogen evolution on steel and titanium in a hypochlorite containing electrolyte. To evaluate the ability of Cr(VI) and Mo(VI) additions to hinder hypochlorite reduction, potential sweep experiments on rotating disc electrodes and cathodic current efficiency (CE) measurements on stationary electrodes were performed. Formed electrode films were investigated with scanning electron microscopy and energy-dispersive X-ray spectroscopy. Cathodic hypochlorite reduction is hindered by the Mo-containing films formed on the cathode surface after Mo(VI) addition to the electrolyte, but much less efficient compared to Cr(VI) addition. Very low levels of Cr(VI), in the mM range, can efficiently suppress hypochlorite reduction on polished titanium and steel. Phosphate does not negatively influence the CE in the presence of Cr(VI) or Mo(VI) but the Mo-containing cathode films become thinner if the electrolyte during the film build-up also contains phosphate. For a RuO2-TiO2 anode polarized in electrolyte with 40 mM Mo(VI), the anode potential increased and increased molybdenum levels were detected on the electrode surface.

QC 20130109

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“…Nitrite has been important from the viewpoint of electrochemistry because it is oxidized to nitrate and reduced to nitric oxide or other compounds. The electrodes for nitrite reduction have been reported, which contain metals [1][2][3][4][5][6][7][8][9][10], binary metals [11,12], metal complexes or metal oxides , doped diamond [34], and biological materials [35]. Some of these reports contain the reduction of both nitrate and nitrite [4][5][6][7][8][9][10][11][12][26][27][28][29][30][31][32][33][34][35], which indicates that the electrodes having a reduction activity for nitrate is effective for nitrite reduction.…”

Section: Introductionmentioning

confidence: 99%