Electroreduction of nitrate to ammonia in alkaline solutions using hydrogen storage alloy cathodes

Kinetic Studies of the Electrochemical Treatment of Nitrate and Nitrite Ions on Iridium‐Modified Carbon Fiber Electrodes

“…The cloth and titanium foil come in tight contact between the ring and frame and the counter electrode, an expanded mesh of titanium, was positioned parallel to the working electrode. A buffered electrolyte solution at pH 7.0 was maintained using A.C.S.-grade reagents (Sigma ± Aldrich) of sodium tetraborate decahydrate (Na 2 . The column temperature was ramped from 25 C to 150 C at a rate of 12 C min ±1 , and then maintained at 150 C.…”

“…A valve at the reactor inlet was used to control the electrolyte flow rate. The electrolytes flowed through the working electrode, which had a surface area of about 700 cm 2 . Three electrolyte flow rates were studied at 75.7 and 189.2 L per hr (Lphr), respectively.…”

“…Several of the reported investigations were carried out in either acidic or alkaline concentrated nitrate and nitrite ion solutions for environmental reasons [3,5,6]. Lu et al [2] used different hydrogen storage cathodes to reduce nitrate to ammonia in alkaline media and found that the efficiency of ammonia production depended on the nitrate ion concentration, electrode type and applied current density. Both galvanostatic and potentiodynamic electroreduction were investigated.…”

High electrocatalytic performance of Pd/Sn/Au electrodes for nitrate reduction

“…The electrochemical reduction of nitrate has been conducted using various electrodes such as metals [3][4][5][6], binary metals (adatoms [7][8][9][10][11][12] and alloys [13,14]), metal complexes [15][16][17][18][19] and synthetic diamonds [20,21]. Of these, binary metal electrodes such as Cu/Pd and Ge/Pt showed higher catalytic activities.…”

Electrochemical reduction of NO3− and NO2− on a composite copper thallium electrode in alkaline solutions

“…Electrochemical reduction catalysis can be advantageously applied to the treatment of industrial wastewater, whereby nitrate species are transformed into harmless reduction products from various cathodic materials and solutions of different compositions [5][6][7][8][9][10][11]. In addition, electroanalytical methodologies have been proposed for the identification and quantification of nitrate and nitrite species in various analytical contexts [12][13][14][15][16][17].…”