Electrochemical nitrate reduction by using a novel Co 3 O 4 /Ti cathode

Su, Liuhua; Li, Kan; Zhang, Hongbo; Fan, Maohong; Ying, Deng; Sun, Tonghua; Wang, Yalin; Jia, Jinping

doi:10.1016/j.watres.2017.04.069

Cited by 232 publications

(111 citation statements)

References 56 publications

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“…Due to the high concentration of NaCl was needed in the condition, it can be used to treat high conductivity wastewater. Especially, the industrial wastewaters contain large amount of inorganic salts (

{NO}_{3}^{-}

{SO}_{4}^{2 -}

, Cl − , etc) such as textile wastewater and landfill leachate (Li et al, ; Su et al, ). Under these conditions, the energy consumptions per kilogram of the converted nitrate of the Cu/Zn and Cu/Ni/Zn alloy electrodes were 145.1 kWhr/kg of N and 153.0 kWhr/kg of N, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Electrochemical behaviors and influence factors of copper and copper alloys cathode for electrocatalytic nitrate removal

Zhang

Yin

Zhai

et al. 2019

Water Environment Research

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The electrocatalytic activities of a series of copper alloys, Cu/Ni/Zn (Cu60Ni15Zn25) and Cu/Zn (Cu62Zn38), toward the reduction of nitrate were investigated, in comparison with that of pure copper. Electrochemical analysis showed that the copper alloy electrode exhibited higher electrochemical reduction rate of nitrate. The extreme difference (R) between the orthogonal experiments revealed that the NO3--N concentration was the main determinant of the removal percentage, followed by the current density and electrolyte concentration, while the impact of the initial pH was minimal. The conditions of the electrolysis experiments with Cu/Ni/Zn and Cu/Zn cathodes were optimized as follows: a current density of 8 mA/cm2, a NaCl concentration of 2.0 g/L, and an initial pH of 3.0. The nitrate reduction reaction process with copper alloy cathodes was confirmed by electrochemical analysis and electrolysis experiments. Therefore, copper alloyed with Zn and Ni is a feasible option for practical application to the electrocatalytic reduction of nitrate. Practitioner points Alloy of Cu, Zn, and Ni improved electrochemical nitrate reduction reaction. Electrochemical reduction of nitrate was confirmed in the presence of NaCl. The optimized current density with copper alloy cathodes was 6 mA/cm2. A feasible strategy was provided for the improving nitrate removal and minimizing by‐products.

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{NO}_{3}^{-}

{SO}_{4}^{2 -}

Section: Resultsmentioning

confidence: 99%

“…SO 2− 4 , Cl − , etc) such as textile wastewater and landfill leachate Su et al, 2017). Under these conditions, the energy consumptions per kilogram of the converted nitrate of the Cu/Zn and Cu/Ni/Zn alloy electrodes were 145.1 kWhr/ kg of N and 153.0 kWhr/kg of N, respectively.…”

Section: Research Articlementioning

confidence: 96%

Electrochemical behaviors and influence factors of copper and copper alloys cathode for electrocatalytic nitrate removal

Zhang

Yin

Zhai

et al. 2019

Water Environment Research

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“…However, there are insufficient attempts focusing on the application of HER, which deserves to be considered a further exploration. It is particularly distinguished that nitrate can arouse eutrophication in aquatic ecosystems and the beneficiation of this nutrient pollutant in surface and ground water may lead to blue baby syndrome in infants and gastrointestinal cancer in adults . Many treatment technologies including biological denitrification, ion exchange, physical adsorption, membrane separation, as well as chemical and electrochemical reduction have been employed for efficient removal of nitrate .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

et al. 2020

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Nickel phosphide (Ni 2 P) has been widely explored toward hydrogen evolution reaction (HER) for desirable durability and high performance. Tuning the electronic structures and morphologies of Ni 2 P plays a pivotal role in the improvement of HER performance. In this work, three Ni 2 P catalysts were fabricated by different strategies and their HER properties were compared. It was found that the bicontinuous porous structured Ni 2 P on Ni foam (Ni 2 P /NFÀ EHP) prepared using coupled electroless nickel-phosphorus (NiÀ P) plating, hydrothermal synthesis and low temperature phosphorization techniques, exhibits the best catalytic activity and a wide pH adaptability. The overpotential at 10 mA cm À 2 and Tafel slope are 78 mV and 33 mV dec À 1 in 0.5 M H 2 SO 4 , those in 1 M PBS are 125 mV and 93 mV dec À 1 , and 101 mV and 76 mV dec À 1 in 1 M KOH. Additionally, the Ni 2 P/NFÀ EHP-catalyzed HER process is also applicable for nitrate reduction with a remarkable removal efficiency of 92.6 %. This catalyst also exhibits a desirable durability both in HER and nitrate reduction. This work offers an efficient strategy to exploit compatible pH-universal HER catalysts, explores the engineering application of HER process in nitrate reduction.

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“…Several other methods, such as ion exchange [7,8] and reverse osmosis [9], are also used to remove ammonia. However, concentrated wastewater will be produced during the process which may pose a disposal problem [10,11].…”

Section: Introductionmentioning

confidence: 99%

Process Optimization of Electrochemical Oxidation of Ammonia to Nitrogen for Actual Dyeing Wastewater Treatment

Yao

Xia

et al. 2019

IJERPH

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To mitigate the potential environmental risks caused by nitrogen compounds from industrial wastewater, residual ammonia after conventional wastewater treatment should be further eliminated. In this work, an electrochemical oxidation process for converting ammonia to nitrogen in actual dyeing wastewater was investigated. The effects of the main operating parameters, including initial pH value, applied current density, NaCl concentration, and flow, were investigated on ammonia removal and products distribution. Experimental results indicated that, under optimal conditions of an initial pH value of 8.3, applied current density of 20 mA cm−2, NaCl concentration of 1.0 g L−1, and flow of 300 mL min−1, the ammonia could be completely removed with N2 selectivity of 88.3% in 60 min electrolysis. A kinetics investigation using a pseudo-first-order model provided a precise description of ammonia removal during the electro-oxidation process. Experimental functions for describing the relationships between kinetic constants of ammonia removal and main operating parameters were also discussed. Additionally, the mechanisms and economic evaluation of ammonia oxidation were conducted. All these results clearly proved that this electro-oxidation process could efficiently remove ammonia and achieve high N2 selectivity.

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Electrochemical nitrate reduction by using a novel Co 3 O 4 /Ti cathode

Cited by 232 publications

References 56 publications

Electrochemical behaviors and influence factors of copper and copper alloys cathode for electrocatalytic nitrate removal

Electrochemical behaviors and influence factors of copper and copper alloys cathode for electrocatalytic nitrate removal

Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

Process Optimization of Electrochemical Oxidation of Ammonia to Nitrogen for Actual Dyeing Wastewater Treatment

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Electrochemical nitrate reduction by using a novel Co 3 O 4 /Ti cathode

Cited by 232 publications

References 56 publications

Electrochemical behaviors and influence factors of copper and copper alloys cathode for electrocatalytic nitrate removal

Electrochemical behaviors and influence factors of copper and copper alloys cathode for electrocatalytic nitrate removal

Fabrication of Porous Configurated Ni2P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction

Process Optimization of Electrochemical Oxidation of Ammonia to Nitrogen for Actual Dyeing Wastewater Treatment

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Product

Resources

About

Fabrication of Porous Configurated Ni₂P/Ni Foam Catalyst and its Boosted Properties for pH‐universal Hydrogen Evolution Reaction and Efficient Nitrate Reduction