Development of a Pt modified microelectrode aimed for the monitoring of ammonium in solution

Ning, Yun-Fang; Yan, Peng; Chen, You‐Peng; Guo, Jinsong; Shen, Yu; Fang, Fang; Tang, Ying; Gao, Xu

doi:10.1080/03067319.2016.1277994

Cited by 13 publications

(6 citation statements)

References 29 publications

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“…In electrochemical methods, the construction of highly sensitive catalysts is crucial. For ammonia, the sensitive materials can be categorized as conductive polymers, carbon-based materials, nanometal, nanometal oxides, and the combinations of them [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. Pt has been considered to be the metal catalyst with the best performance for ammonia electro-oxidation [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, during the electro-oxidation of ammonia, the intermediate products are easily adsorbed on the electrode surface, which can lead to the poisoning of the electrode [ 22 , 23 ]. To address this issue, Pt-based nanoparticles and nanocomposites were developed, such as Pt NPs-Pt electrode [ 12 , 13 ], Pt NPs-ITO electrode [ 14 ], PtNi NPs-CC electrode [ 15 ], PtCu NPs-CC electrode [ 16 ], PtAg NPs-PPy-NiF composite electrode [ 17 ], Pt NPs-Ni(OH) 2 -CC composite electrode [ 18 ], Pt NPs-PANI-CC composite electrode [ 19 ], etc. These nanomaterials can provide more active sites for the oxidation of ammonia to reduce poisoning and passivation of the electrodes.…”

Section: Introductionmentioning

confidence: 99%

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Ultramicro Interdigitated Array Electrode Chip with Optimized Construction for Detection of Ammonia Nitrogen in Water

Zhao

Cong

et al. 2023

Micromachines

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Ammonia nitrogen is a common contaminant in water and its determination is important for environmental protection. In this paper, an electrochemical sensor based on an ultramicro interdigitated array electrode (UIAE) chip with optimized construction was fabricated with Micro-Electro-Mechanical System (MEMS) technology and developed to realize the detection of ammonia nitrogen in water. The effects of spacing-to-width ratio and width of the working electrode on UIAE’s electrochemical characteristics and its ammonia nitrogen detection performance were studied by finite element simulation and experiment. The results demonstrated that the smaller the spacing-to-width ratio, the stronger generation–collection effect, and the smaller the electrode width, the stronger the edge effect, which led to an easier steady-state reach, a higher response current, and better ammonia nitrogen determination performance. The fabricated UIAE chip with optimized construction showed the linear detection range of 0.15 mg/L~2.0 mg/L (calculated as N), the sensitivity of 0.4181 μA·L·mg−1, and good anti-interference performance, as well as a long lifetime. UIAE based on bare Pt was successfully applied to ammonia nitrogen detection in water by optimizing structure, which might broaden the methods of ammonia nitrogen detection in water.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultramicro Interdigitated Array Electrode Chip with Optimized Construction for Detection of Ammonia Nitrogen in Water

Zhao

Cong

et al. 2023

Micromachines

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“…On the other hand, electrochemical system has been widely applied into ammonia sensor field because of their high selectivity and sensitivity (Ribeiro et al, 2012;Herzog, 2015;Zhybak et al, 2016;Ning et al, 2017). The electrochemical ammonia sensors, which are based on the ammonia ion transfer reactions across different electrolyte interfaces, mainly include potentiometric and amperometric methods (Bertocchi et al, 1996;Abass et al, 1998;Zolotov et al, 2014;Herzog, 2015).…”

Section: Introductionmentioning

confidence: 99%

Integrated electrochemical-biological process as an alternative mean for ammonia monitoring during anaerobic digestion of organic wastes

Zhao

Jin

et al. 2018

Chemosphere

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Ammonia monitoring is important to control anaerobic digestion (AD) process due to inhibition effect. Here, an electrolysis cell (EC) was integrated with a complete nitrification reactor as an alternative approach for online monitoring of ammonia during AD processes. The AD effluent was pumped into nitrification reactor to convert ammonia to nitrate, followed by the introduction of nitrate-rich effluent to EC cathode. It was first evaluated with synthetic ammonia-rich digesters and was observed that the current at 5 min were linearly corresponding to the ammonia levels (from 0 to 7.5 mM NH-N, R = 0.9673). The linear relationship was always observed regardless of different wastewater pH and external voltage. Pre-removal of other electron acceptors from digestate at cathode could eliminate their disturbances to sensor performance. Finally, the accuracy of biosensor was verified with real digestate test. The simple and reliable biosensor showed great promising for online ammonia monitoring of AD processes.

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“…Methods for

{NH}_{4}^{+}

analysis in water include potentiometric (Humenyuk et al 2006; Alifragis et al 2007; Coutinho et al 2007; Gallardo‐Gonzalez et al 2019), amperometric (Dave et al 2017), voltammetric (Ning et al 2017), conductometric (Carlson 1978; Hall and Aller 1992; Saiapina et al 2016), and wet‐chemistry followed by optical (Fishman 1993; Prieto‐Blanco et al 2015; Khongpet et al 2019; Jaikang et al 2020; Keskin et al 2020; Li et al 2023) sensors. Potentiometric sensors are low cost, portable, and user‐friendly; however, they may display interference in the presence of potassium, and those without this interference have a high limit of detection (> 40 μ M; Mahmud et al 2020).…”

mentioning

confidence: 99%

A novel boat‐based field application of a high‐frequency conductometric ammonium analyzer to characterize spatial variation in aquatic ecosystems

Richardson,

Hansen,

Kraus

et al. 2023

Limnology & Ocean Methods

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Documenting dissolved inorganic nitrogen (DIN) concentrations and forms at appropriate temporal and spatial scales is key to understanding aquatic ecosystem health, particularly because DIN fuels primary productivity. In addition to point and nonpoint source nutrient inputs, factors such as hydrology, geomorphology, temperature, light, and biogeochemical transformations influence nutrient dynamics in surface waters, allowing for the formation of steep spatial gradients and patchiness. Documenting nutrient variability is also necessary to identify sources, quantify transformation rates, and understand drivers. Because of logistical and cost constraints, it is often unfeasible to measure concentrations of nutrients in surface waters using discrete sampling followed by laboratory analysis at a resolution high enough to identify steep spatial gradients and patchiness. Because of these constraints, data generated from discrete sampling are limited in space and time, often missing key variabilities. Recent advancements of in situ nitrate plus nitrite ( and ) sensor technology have enabled highly temporally and spatially resolved concentration measurements in aquatic ecosystems. However, comparable information about ammonium () concentrations remains unavailable. To address this need, US Geological Survey collaborated with Timberline Instruments to modify their commercially available benchtop TL‐2800 ammonia analyzer to operate in flow‐through mode, enabling rapid continuous concentration measurements at a micromolar (0.5 μM) resolution while receiving water pumped from a moving boat. Although the utility of this method is described for spatial surveys, we anticipate that it would be adaptable to installation at a fixed station for continuous monitoring of concentration.

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Development of a Pt modified microelectrode aimed for the monitoring of ammonium in solution

Cited by 13 publications

References 29 publications

Ultramicro Interdigitated Array Electrode Chip with Optimized Construction for Detection of Ammonia Nitrogen in Water

Ultramicro Interdigitated Array Electrode Chip with Optimized Construction for Detection of Ammonia Nitrogen in Water

Integrated electrochemical-biological process as an alternative mean for ammonia monitoring during anaerobic digestion of organic wastes

A novel boat‐based field application of a high‐frequency conductometric ammonium analyzer to characterize spatial variation in aquatic ecosystems

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