Ultrasensitive and highly selective detection of dopamine by a NiFeP based flexible electrochemical sensor

Thakur, Neha; Chaturvedi, Akansha; Mandal, Debaprasad; Nagaiah, Tharamani C.

doi:10.1039/d0cc03583a

Cited by 38 publications

(27 citation statements)

References 21 publications

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“…A simple synthetic approach was executed for designing the NiFeP/Pi catalyst and involved the hydrothermal synthesis of NiFe layered double hydroxide (NiFe-LDH) followed by a low-temperature phosphorization reaction with red phosphorus under microwave irradiation, which helps to retain the morphology and structure. 50 The variation in the Ni/Fe ratio leads to morphological and microstructural differences ,which were optimized with respect to morphology and oxygen bifunctional activity (ORR and OER). The morphological attributes of the designed NiFeP/Pi catalyst were analyzed using FESEM, TEM, and HRTEM techniques.…”

Section: Resultsmentioning

confidence: 99%

Nickel Iron Phosphide/Phosphate as an Oxygen Bifunctional Electrocatalyst for High-Power-Density Rechargeable Zn–Air Batteries

Thakur

Kumar

Mandal

et al. 2021

ACS Appl. Mater. Interfaces

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The evolution of an effective oxygen electrocatalyst is of great importance for the widespread application of Zn–air batteries but remains an immense challenge. Thus, an efficient catalyst toward the oxygen evolution reaction and oxygen reduction reaction (OER and ORR) is highly essential for high-performance Zn–air batteries. Here, we have reported bifunctional nickel iron phosphide/phosphate (NiFeP/Pi) catalysts with various Ni/Fe ratios toward oxygen electrocatalysis in alkaline media. These catalysts are highly active toward OER and ORR, wherein NiFe(1:2)P/Pi exhibits a low OER overpotential of 0.21 V at 10 mA cm–2 and a high ORR onset potential (0.98 V vs RHE) with the lowest potential difference (ΔE = E 10 – E 1/2) of 0.62 V, which surpasses that of the benchmark Pt/C and RuO2 catalyst as well as those of most previously reported bifunctional catalysts. Furthermore, the NiFe(1:2)P/Pi-based Zn–air battery demonstrates a very high power density of 395 mW cm–2 and outstanding discharge capacity of 900 mAh g–1@10 mA cm–2 along with steady cyclability, maintaining 98% of the round trip efficiency over 300 cycles. These results are helpful for a good understanding of the composition–activity relation with a certain band gap toward high-performance Zn–air batteries.

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Section: Resultsmentioning

confidence: 99%

Nickel Iron Phosphide/Phosphate as an Oxygen Bifunctional Electrocatalyst for High-Power-Density Rechargeable Zn–Air Batteries

Thakur

Kumar

Mandal

et al. 2021

ACS Appl. Mater. Interfaces

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“…Metal phosphides, such as Ni 2 P and Ni x Co y P, have exhibited excellent catalytic ability, owing to the P atom altering the electronic structure for more metallic character [129]. Thakur et al phosphorized a NiFe-LDH for enhanced conductivity, improving the catalytic activity for electrochemical DA detection [130]. A phosphorized NiFe-LDH (NiFeP) was synthesized via a microwave-induced phosphorization reaction of NiFe-LDHs with red phosphorus.…”

Section: Dopaminementioning

confidence: 99%

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Kim

Varga

Adhikari³

et al. 2021

Nanomaterials

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Layered double hydroxides (LDHs) have attracted considerable attention as promising materials for electrochemical and optical sensors owing to their excellent catalytic properties, facile synthesis strategies, highly tunable morphology, and versatile hosting ability. LDH-based electrochemical sensors are affordable alternatives to traditional precious-metal-based sensors, as LDHs can be synthesized from abundant inorganic precursors. LDH-modified probes can directly catalyze or host catalytic compounds that facilitate analyte redox reactions, detected as changes in the probe’s current, voltage, or resistance. The porous and lamellar structure of LDHs allows rapid analyte diffusion and abundant active sites for enhanced sensor sensitivity. LDHs can be composed of conductive materials such as reduced graphene oxide (rGO) or metal nanoparticles for improved catalytic activity and analyte selectivity. As optical sensors, LDHs provide a spacious, stable structure for synergistic guest–host interactions. LDHs can immobilize fluorophores, chemiluminescence reactants, and other spectroscopically active materials to reduce the aggregation and dissolution of the embedded sensor molecules, yielding enhanced optical responses and increased probe reusability. This review discusses standard LDH synthesis methods and overviews the different electrochemical and optical analysis techniques. Furthermore, the designs and modifications of exemplary LDHs and LDH composite materials are analyzed, focusing on the analytical performance of LDH-based sensors for key biomarkers and pollutants, including glucose, dopamine (DA), H2O2, metal ions, nitrogen-based toxins, and other organic compounds.

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“…The peak at 531.9 eV corresponds to the surface oxygen vacancies, [27,28] whereas the other peak at 530. 35 eV is assigned to the FeÀ O bonds. [29] Electrocatalytic activities of synthesized composites toward dopamine CV measurements for the electrodes of GCE, Fe/MOF/GCE, Fe 3 O 4 @C -450 /GCE, Fe/Fe 3 O 4 @C -550 /GCE, Fe/Fe 3 O 4 @C -650 /GCE and Fe/Fe 3 O 4 @C -750 /GCE were carried out in the presence of 50 μM DA to investigate the catalytic activity toward DA oxidation (Figure 4(A)).…”

Section: Characterizationsmentioning

confidence: 99%

Electrochemical Dopamine Detection using a Fe/Fe3O4@C Composite derived from a Metal‐Organic Framework

et al. 2022

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In this paper, a novel composite of Fe/Fe 3 O 4 @C is synthesized by taking a Fe-metal-organic framework (Fe-MOF) as precursor template. Different treating temperature (450, 550, 650 and 750 °C) were carried out to investigate the composite of calcined products. The Fe/Fe 3 O 4 @C -650 modified glassy carbon electrode (Fe/Fe 3 O 4 @C -650 GCE) shows good electrocatalytic activity towards dopamine (DA) oxidation. Three electrochemical measuring methods of cyclic voltammetry (CV), differential pulse voltammetry (DPV) and amperometry i-t are adopted to investigate the sensing behaviors of Fe/Fe 3 O 4 @C -650 /GCE. The results show that: the sensors based on CV and DPV technology exhibit excellent advantages in the aspect of sensitivity and linear range thanthose of the sensor based on amperometry i-t technology. Meanwhile, the sensor based on CV method shows good selectivity for dopamine, and can resist the influence of various sugars, uric acid, ascorbic acid, as well as Na + and K + . The sensor also shows good stability and repeatability in the sensing process. In addition, the Fe/Fe 3 O 4 @C -650 /GCE could be successfully applied in the DA detection in the human serum.

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Ultrasensitive and highly selective detection of dopamine by a NiFeP based flexible electrochemical sensor

Abstract: An ultrasensitive novel NiFeP based flexible electrochemical sensor was developed for highly selective detection of dopamine.

Cited by 38 publications

References 21 publications

Nickel Iron Phosphide/Phosphate as an Oxygen Bifunctional Electrocatalyst for High-Power-Density Rechargeable Zn–Air Batteries

Nickel Iron Phosphide/Phosphate as an Oxygen Bifunctional Electrocatalyst for High-Power-Density Rechargeable Zn–Air Batteries

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Electrochemical Dopamine Detection using a Fe/Fe3O4@C Composite derived from a Metal‐Organic Framework

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