Electrochemical sensor based on polyoxometalate immobilized using a layer-by-layer assembly process to detect 2,4-dinitrophenylhydrazine

Bi, Lei; Yu, Xiang; Pei, Jianye

doi:10.1039/d2nj00312k

Cited by 2 publications

(2 citation statements)

References 47 publications

(61 reference statements)

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“…Among various POM structural units, the high nuclear cyclic 48-tungsto-8-phosphate [H 7 P 8 W 48 O 184 ] 33− (P 8 W 48 ) cluster is more attractive for rapid and chemically reversible multielectron transfer than traditional POM anions such as Keggin and Dawson types. 35,36 Recent results reported by Leroy Cronin and collaborators also demonstrate that P 8 W 48 possesses the best electron storage ability for a single oxocluster. 37 The P 8 W 48 cluster is composed of four [H 2 P 2 W 12 O 48 ] 12− Wells−Dawson subunits linked by oxobridges, resulting in a crown-type arrangement and delivering D4h symmetry (Figure S1), 38 which can well maintain structural stability over a wide pH range from 0 to 8.…”

Section: Introductionmentioning

confidence: 91%

“…In addition, POMs are a typical class of Lewis acids that would promote the adsorption of the weak Lewis base NO 2 – on their surfaces, thus further facilitating the whole NO 2 RR process. , Given the above discussion, it is anticipated that further exploration of the potential of POMs as available NO 2 RR electrocatalysts. Among various POM structural units, the high nuclear cyclic 48-tungsto-8-phosphate [H 7 P 8 W 48 O 184 ] 33– (P 8 W 48 ) cluster is more attractive for rapid and chemically reversible multielectron transfer than traditional POM anions such as Keggin and Dawson types. , Recent results reported by Leroy Cronin and collaborators also demonstrate that P 8 W 48 possesses the best electron storage ability for a single oxo-cluster . The P 8 W 48 cluster is composed of four [H 2 P 2 W 12 O 48 ] 12– Wells–Dawson subunits linked by oxo-bridges, resulting in a crown-type arrangement and delivering D4h symmetry (Figure S1), which can well maintain structural stability over a wide pH range from 0 to 8 .…”

Section: Introductionmentioning

confidence: 99%

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Polyoxometalate-Intercalated Tremella-Like CoNi-LDH Nanocomposites for Electrocatalytic Nitrite–Ammonia Conversion

Zhang,

Jia,

et al. 2024

Inorg. Chem.

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The electrocatalytic reduction of NO 2 − (NO 2 RR) holds promise as a sustainable pathway to both promoting the development of emerging NH 3 economies and allowing the closing of the NO x loop. Highly efficient electrocatalysts that could facilitate this complex six-electron transfer process are urgently desired. Herein, tremella-like CoNi-LDH intercalated by cyclic polyoxometalate (POM) anion P 8 W 48 (P 8 W 48 /CoNi-LDH) prepared by a simple two-step hydrothermal−exfoliation assembly method is proposed as an effective electrocatalyst for NO 2 − to NH 3 conversion. The introduction of POM with excellent redox ability tremendously increased the electrocatalytic performance of CoNi-LDH in the NO 2 RR process, causing P 8 W 48 /CoNi-LDH to exhibit large NH 3 yield of 0.369 mmol h −1 mg cat −1 and exceptionally high Faradic efficiency of 97.0% at −1.3 V vs the Ag/AgCl reference electrode in 0.1 M phosphate buffer saline (PBS, pH = 7) containing 0.1 M NO 2 − . Furthermore, P 8 W 48 /CoNi-LDH demonstrated excellent durability during cyclic electrolysis. This work provides a new reference for the application of POM-based nanocomposites in the electrochemical reduction of NO 2 − to obtain value-added NH 3 .

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Polyoxometalate-Intercalated Tremella-Like CoNi-LDH Nanocomposites for Electrocatalytic Nitrite–Ammonia Conversion

Zhang,

Jia,

et al. 2024

Inorg. Chem.

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First Two-Way Electrochemical Sensor for the Detection of the Pollutant 2,4-Dinitrophenylhydrazine and Its Metabolite Based on Cu-Containing Tungstophosphate and Graphene Oxide

Yan

Pei

et al. 2023

Catalysts

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2,4-dinitrophenylhydrazine (2,4-DNPH) is a toxic organic pollutant which is highly threatening to human beings and their living environment. Therefore, it is of great significance to develop sensors for detecting 2,4-DNPH and its metabolites. To develop a two-way electrochemical sensor for the detection of 2,4-DNPH and its metabolite, Cu-containing tungstophosphate (Na16P4W30Cu4(H2O)2O112·nH2O, Cu4P4W30) was selected to study its electrocatalytic activity for the reduction of 2,4-DNPH and oxidation of its metabolite. First, the electrochemical behavior of Cu4P4W30 was investigated in solution; then, the films containing Cu4P4W30 and graphene oxide (GO) were fabricated on indium tin oxide (ITO) to form the modified ITO/PDDA/(Cu4P4W30/PDDA-GO)n electrode and the effect of the layer number on the electrocatalytic performance of the modified electrode was studied, confirming the optimal film layer number. Furthermore, the sensing performance of the modified electrode was tested, giving a linear concentration range and detection limit. Finally, the stability, repeatability, and reproducibility of the modified electrode were evaluated. The findings demonstrated that the proposed electrode acted as a two-way electrochemical sensor for the detection of 2,4-DNPH and its metabolite.

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Electrochemical sensor based on polyoxometalate immobilized using a layer-by-layer assembly process to detect 2,4-dinitrophenylhydrazine

Abstract: To develop a excellent electrochemical sensor for the detection of 2,4-Dinitrophenylhydrazine (2,4-DNPH), which has become a primary organic pollutant in the environment and it is greatly poisonous, four polyoxometalates (POMs)...

Cited by 2 publications

References 47 publications

Polyoxometalate-Intercalated Tremella-Like CoNi-LDH Nanocomposites for Electrocatalytic Nitrite–Ammonia Conversion

Polyoxometalate-Intercalated Tremella-Like CoNi-LDH Nanocomposites for Electrocatalytic Nitrite–Ammonia Conversion

First Two-Way Electrochemical Sensor for the Detection of the Pollutant 2,4-Dinitrophenylhydrazine and Its Metabolite Based on Cu-Containing Tungstophosphate and Graphene Oxide

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