Cu, Ni and multi-walled carbon-nanotube-modified graphite felt electrode for nitrate electroreduction in water

Lu, Chang; Lü, Xin; Yang, Kun; Song, Haiou; Zhang, Shupeng; Li, Aimin

doi:10.1007/s10853-020-05764-3

Cited by 23 publications

(9 citation statements)

References 45 publications

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“…According to the literature [24], mass transport limitations must be overcome to increase the performance of the process. Three-dimensional (3D) electrodes, due to their porous structure can increase the specific surface area, allowing a higher catalytic reduction of pollutants [25]. In this context, copper (Cu) foam has been reported as one of the materials with the best kinetics for the nitrate reduction limiting step (Eq.…”

Section: Introductionmentioning

confidence: 99%

Highly reactive Cu-Pt bimetallic 3D-electrocatalyst for selective nitrate reduction to ammonia

Cerrón-Calle

Fajardo

Sánchez‐Sánchez

et al. 2022

Applied Catalysis B: Environmental

177

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Section: Introductionmentioning

confidence: 99%

Highly reactive Cu-Pt bimetallic 3D-electrocatalyst for selective nitrate reduction to ammonia

Cerrón-Calle

Fajardo

Sánchez‐Sánchez

et al. 2022

Applied Catalysis B: Environmental

177

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“… 25 − 27 In comparison with other deposition methods, such as e-beam evaporation, sputtering, and pulsed laser deposition, electrodeposition does not need expensive equipment for ultrahigh vacuum and high temperature. 28 Moreover, Cu can be easily electrodeposited in the form of nanoclusters or nanoparticles on top of different bulky electrodes, such as glassy carbon, graphite felt, and disk electrodes, as reported, for example, by Bagheri et al, 10 Lu et al, 29 and Stortini et al, 30 respectively. Additionally, we decided to use screen printing, a fabrication technique that enables the development of flexible, disposable, and cheap electrochemical sensors.…”

Section: Introductionmentioning

confidence: 91%

“…Electrodeposition is a well-established, easy, cost-effective, and large-area scalable deposition technique of pure metal, metal alloy, or oxide, where the growth process can be easily kinetically controlled by changing the deposition time and current density in cyclic voltammetry (CV) or chronoamperometry. − In comparison with other deposition methods, such as e-beam evaporation, sputtering, and pulsed laser deposition, electrodeposition does not need expensive equipment for ultrahigh vacuum and high temperature . Moreover, Cu can be easily electrodeposited in the form of nanoclusters or nanoparticles on top of different bulky electrodes, such as glassy carbon, graphite felt, and disk electrodes, as reported, for example, by Bagheri et al, Lu et al, and Stortini et al, respectively. Additionally, we decided to use screen printing, a fabrication technique that enables the development of flexible, disposable, and cheap electrochemical sensors .…”

Section: Introductionmentioning

confidence: 99%

Flexible Screen-Printed Electrochemical Sensors Functionalized with Electrodeposited Copper for Nitrate Detection in Water

et al. 2021

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Nitrate (NO 3 – ) contamination is becoming a major concern due to the negative effects of an excessive NO 3 – presence in water which can have detrimental effects on human health. Sensitive, real-time, low-cost, and portable measurement systems able to detect extremely low concentrations of NO 3 – in water are thus becoming extremely important. In this work, we present a novel method to realize a low-cost and easy to fabricate amperometric sensor capable of detecting small concentrations of NO 3 – in real water samples. The novel fabrication technique combines printing of a silver (Ag) working electrode with subsequent modification of the electrode with electrodeposited copper (Cu) nanoclusters. The process was tuned in order to reach optimized sensor response, with a high catalytic activity toward electroreduction of NO 3 – (sensitivity: 19.578 μA/mM), as well as a low limit of detection (LOD: 0.207 nM or 0.012 μg/L) and a good dynamic linear concentration range (0.05 to 5 mM or 31 to 310 mg/L). The sensors were tested against possible interference analytes (NO 2 – , Cl – , SO 4 2– , HCO 3 – , CH 3 COO – , Fe 2+ , Fe 3+ , Mn 2+ , Na + , and Cu 2+ ) yielding only negligible effects [maximum standard deviation (SD) was 3.9 μA]. The proposed sensors were also used to detect NO 3 – in real samples, including tap and river water, through the standard addition method, and the results were compared with the outcomes of high-performance liquid chromatography (HPLC). Temperature stability (maximum SD 3.09 μA), stability over time (maximum SD 3.69 μA), reproducibility (maximum SD 3.20 μA), and repeatability (maximum two-time useable) of this sensor were also investigated.

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“…It is well-known that copper (Cu) is an outstanding electrocatalytic material, due to its good conductivity and weak ability of HER, − but the Cu catalysts usually show poor resistance to corrosion and low faradaic efficiency (FE) toward NH 3 in NO 3 – RR. , To overcome these obstacles, Cu-based bimetallic catalysts (for instance, CuNi, CuCo, and CuFe) can significantly enhance resistance to corrosion and improve catalytic stability. Additionally, they often display higher activity than monometallic Cu catalysts. − However, although these Cu-based bimetallic catalysts have been studied in electrocatalytic NO 3 – RR for a long time, there are few reports on horizontal comparison and analysis of their structural properties and catalytic performances.…”

Section: Introductionmentioning

confidence: 99%

Insights into Electrocatalytic Nitrate Reduction to Ammonia via Cu-Based Bimetallic Catalysts

Zhao

Liu

Yang

et al. 2023

ACS Sustainable Chem. Eng.

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Cu-based bimetallic catalysts have been studied in the electrocatalytic nitrate (NO3 –) reduction reaction (NO3 –RR) for a long time. However, few studies have focused on horizontal comparison of CuNi, CuCo, and CuFe (abbreviated as CuM) bimetallic catalysts in electrocatalytic NO3 –RR for ammonia synthesis. Herein, we prepare the three series of Cu-based bimetallic catalysts, with different atom ratios of Cu/M (Cu/M = 7/3, 5/5, or 3/7) and ordered mesoporous carbon (OMC) as support (denoted as CuM/OMC). The characterization results reveal that the metallic particles of Cu and M components possess an intimate relationship on the CuM/OMC catalysts. The electrocatalytic NO3 –RR performance uncovers that the optimal NH3 yield rates of CuM/OMC catalysts at −0.8 V (vs reversible hydrogen electrode (RHE)) follow this order: Cu5Fe5/OMC > Cu5Co5/OMC > Cu7Ni3/OMC > Cu/OMC > Fe/OMC > Co/OMC > Ni/OMC > OMC. The bimetallic CuM/OMC catalysts exhibit higher NH3 yield rates than the monometallic catalysts. This is attributed to strong synergistic effects between the Cu and M components. We expect that these insights can stimulate new developments of bimetallic catalysts in electrocatalysis.

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Cu, Ni and multi-walled carbon-nanotube-modified graphite felt electrode for nitrate electroreduction in water

Cited by 23 publications

References 45 publications

Highly reactive Cu-Pt bimetallic 3D-electrocatalyst for selective nitrate reduction to ammonia

Highly reactive Cu-Pt bimetallic 3D-electrocatalyst for selective nitrate reduction to ammonia

Flexible Screen-Printed Electrochemical Sensors Functionalized with Electrodeposited Copper for Nitrate Detection in Water

Insights into Electrocatalytic Nitrate Reduction to Ammonia via Cu-Based Bimetallic Catalysts

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