“Green” Prussian Blue Analogues as Peroxidase Mimetics for Amperometric Sensing and Biosensing

Prussian blue analogs (PBAs) are well-known artificial enzymes with peroxidase (PO)-like activity. PBAs have a high potential for applications in scientific investigations, industry, ecology and medicine. Being stable and both catalytically and electrochemically active, PBAs are promising in the construction of biosensors and biofuel cells. The “green” synthesis of PO-like PBAs using oxido-reductase flavocytochrome b2 is described in this study. When immobilized on graphite electrodes (GEs), the obtained green-synthesized PBAs or hexacyanoferrates (gHCFs) of transition and noble metals produced amperometric signals in response to H2O2. HCFs of copper, iron, palladium and other metals were synthesized and characterized by structure, size, catalytic properties and electro-mediator activities. The gCuHCF, as the most effective PO mimetic with a flower-like micro/nano superstructure, was used as an H2O2-sensitive platform for the development of a glucose oxidase (GO)-based biosensor. The GO/gCuHCF/GE biosensor exhibited high sensitivity (710 A M−1m−2), a broad linear range and good selectivity when tested on real samples of fruit juices. We propose that the gCuHCF and other gHCFs synthesized via enzymes may be used as artificial POs in amperometric oxidase-based (bio)sensors.

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Switchable self-assembly of Prussian blue analogs nano-tiles triggered by salt stimulus

Physical Chemistry Chemical Physics ◽

10.1039/c5cp06574g ◽

2016 ◽

Vol 18 (4) ◽

pp. 3188-3196 ◽

Cited By ~ 9

Author(s):

D. Dedovets ◽

P. Bauduin ◽

J. Causse ◽

L. Girard ◽

O. Diat

Keyword(s):

Ionic Strength ◽

Prussian Blue ◽

Self Assembly ◽

Prussian Blue Analogues ◽

Prussian Blue Analogs ◽

Superlattice Structures

We showed fully reversible, ionic strength controlled self-assembly of Prussian blue analogues nano-tiles into large superlattice structures.

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Comparing electrochemical analysis and particle induced X-ray emission measurements of Prussian Blue Analogue deposits

Discover Materials ◽

10.1007/s43939-021-00013-z ◽

2021 ◽

Vol 1 (1) ◽

Author(s):

Scott D. Joffre ◽

Paul A. DeYoung ◽

Jennifer R. Hampton

Keyword(s):

Prussian Blue ◽

Electrochemical Measurement ◽

Electrochemical Analysis ◽

Charge Storage ◽

Nickel Hexacyanoferrate ◽

Prussian Blue Analogue ◽

X Ray ◽

Prussian Blue Analogues ◽

Major Interest ◽

Electrochemically Active

AbstractPrussian Blue Analogues are of major interest for their use in alternative battery technologies due to their charge storing ability with a long life cycle. In this work the Prussian Blue Analogue nickel hexacyanoferrate (Ni-HCF) was produced using an all electrochemical method. Creating charge storing materials with electrochemical processes provides a new approach to the development of battery-like materials. These methods have not been commonly employed because the charge storing material yield is not directly known. The charge storage of the Ni-HCF was characterized with two different methods which provided a measure of the electrochemically active Fe present. These were then compared with the Particle Induced X-ray Emission (PIXE) method which measured the total amount of Fe present. By comparing the electrochemical measurement of active Fe to the total Fe as measured by PIXE, the percentage of material that is active in the charge storage was determined. This enables an independent calculation of the specific charge capacity of the material for comparison to other battery technologies.

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Low Potential Prussian Blue Analogs: Manganese Hexacyanochromate

10.26434/chemrxiv.7636451.v1 ◽

2019 ◽

Author(s):

Samuel Wheeler ◽

Isaac Capone ◽

Sarah Day ◽

Chiu C. Tang ◽

Mauro Pasta

Keyword(s):

Crystal Structure ◽

Prussian Blue ◽

Organic Electrolytes ◽

Fast Kinetics ◽

Alkali Ions ◽

Open Framework ◽

Prussian Blue Analogues ◽

Prussian Blue Analogs ◽

Cubic Structure ◽

Sodium And Potassium

Prussian blue analogues (PBAs) have recently shown outstanding electrochemical properties ascribable to their unique open-framework crystal structure that allows the reversible insertion of alkali ions with negligible perturbation to the framework itself. Many hexacyanoferrate materials have shown excellent properties and are some of the most promising sodium- and potassium-ion cathode materials in both aqueous and organic electrolytes. However, there is a distinct lack of candidate PBA materials that operate at low potentials as their characteristic crystalline framework shows instability. In this article we characterise the structure and electrochemical behavior of manganese hexacyanochromate which exhibits reversible sodium insertion at - 0.86 V vs. SHE (1.84 V vs. Na<sup>+</sup>/Na), whilst maintaining the characteristic PBA cubic structure. This is the lowest redox potential of reported PBA materials and shows fast kinetics in a high voltage water-in-salt electrolyte. Further reduction in potential in an organic electrolyte shows decomposition of the crystalline structure.

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