Improvement of the electrochemical and electrocatalytic behavior of Prussian blue/carbon nanotubes composite via ionic liquid treatment

Keihan, Amir Homayoun; Sajjadi, Sharareh

doi:10.1016/j.electacta.2013.07.063

Cited by 33 publications

(13 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many existing studies on the PB film have shown that the electrochemical reaction is a kinetics-controlled process at slow scan rates, but the process becomes diffusioncontrolled when increasing the scan rate. 43 Such a trend is also validated in our work by collecting the electrochemical voltammograms on the gold film deposited by a quasimonolayer of PB nanoparticles (Supporting Information Figure S1). The semi-infinite diffusion model is applicable only when the scan rate is sufficiently high, causing a diffusion layer significantly smaller than the vertical height of nanoparticle.…”

Section: ■ Results and Discussionsupporting

confidence: 76%

Thin-Film Electrochemistry of Single Prussian Blue Nanoparticles Revealed by Surface Plasmon Resonance Microscopy

et al. 2017

View full text Add to dashboard Cite

Electrochemical behaviors of Prussian blue (PB) have been intensively studied for decades because it not only serves as a model electro-active nanomaterial in fundamental electrochemistry but also a promising metal-ion storage electrode material for developing rechargeable batteries. Traditional electrochemical studies are mostly based on bulk materials, leading to an averaged property of billions of PB nanoparticles. In the present work, we employed surface plasmon resonance microscopy (SPRM) to resolve the optical cyclic voltammograms of single PB nanoparticles during electrochemical cycling. It was found that the electrochemical behavior of single PB nanoparticles nicely followed a classical thin-film electrochemistry theory. While kinetic controlled electron transfer was observed at slower scan rates, intraparticle diffusion of K ions began to take effect when the scan rate was higher than 60 mV/s. We further found that the electrochemical activity among individual PB nanoparticles was very heterogeneous and such a phenomenon has not been previously observed in the bulk measurements. The present work not only demonstrates the thin-film electrochemical feature of single electro-active nanomaterials for the first time, it also validates the applicability of SPRM technique to investigate a variety of metal ion-storage battery materials, with implications in both fundamental nanoelectrochemistry and electro-active materials for sensing and battery applications.

show abstract

Section: ■ Results and Discussionsupporting

confidence: 76%

Thin-Film Electrochemistry of Single Prussian Blue Nanoparticles Revealed by Surface Plasmon Resonance Microscopy

et al. 2017

View full text Add to dashboard Cite

show abstract

“…It also revealed the ionic diffusion coefficient to be 2.4×10 -12 cm 2 •s -1 . This value is also consistent with a previously reported value of the potassium ion diffusion coefficient in PB nanomaterials 39 .…”

Section: Theoretical Analysis Of Oeissupporting

confidence: 93%

Determining the depth of surface charging layer of single Prussian blue nanoparticles with pseudocapacitive behaviors

Wang¹,

Niu²,

Jiang³

et al. 2021

Preprint

View full text Add to dashboard Cite

Based on the dependence of the light scattering intensity of single Prussian blue nanoparticles (PBNPs) on their oxidation state during sinusoidal potential modulation at varying frequencies, we present an electro-optical microscopic imaging approach to optically acquire the Faradaic electrochemical impedance spectroscopy (oEIS) of single PBNPs. Frequency analysis revealed typical pseudocapacitive behavior with hybrid charge-storage mechanisms depending on the modulation frequency. In the low-frequency range (0.04–1 Hz), the optical amplitude was inversely proportional to the square root of the modulation frequency (i.e., ∆I ∝ f− 0.5; diffusion-limited process), while in the high-frequency range (1.25–100 Hz), it was inversely proportional to the modulation frequency (∆I ∝ f− 1; surface charging process). The contribution of each process was, therefore, determined and quantified using oEIS at the single-nanoparticle level. Because the geometry of single cuboid-shaped PBNPs can be precisely determined by scanning electron microscopy and atomic force microscopy, oEIS of single PBNPs allowed the determination of the depth of the surface charging layer, revealing it to be ~ 2 unit cells regardless of the nanoparticle size.

show abstract

“…To date, a great amount of enzyme-based and enzyme-free electrochemical sensors have been developed to detect H 2 O 2 . [11][12][13][14][59][60][61] However, the enzymatic biosensors are limited by the poor stability, high cost, complicated immobilization procedure and critical operational conditions due to the inherent nature of enzymes. Thus, major efforts have been made to use various replacement alternatives for enzymes, such as Prussian blue, 15 noble metal nanoparticles, 16 and nanohybrids.…”

Section: Introductionmentioning

confidence: 99%

A ternary nanocomposite electrode of polyoxometalate/carbon nanotubes/gold nanoparticles for electrochemical detection of hydrogen peroxide

Guo

et al. 2015

Analyst

View full text Add to dashboard Cite

In this work, a nanocomposite film electrode containing polyoxometalate (POM) clusters K6P2W18O62 (P2W18), carbon nanotubes (CNTs) and Au nanoparticles (AuNPs) was fabricated by a smart combination of layer-by-layer (LbL) with the self-assembly technique. The synergistic effect of POM, CNTs and AuNPs on the electrocatalysis of H2O2 was investigated to improve the sensitivity of H2O2 detection. The response of (P2W18/CNTs/P2W18/AuNPs)4 electrodes to H2O2 was remarkably enhanced due to large active sites and good electron conducting ability. The sensor exhibited a quick response (less than 1 second) to H2O2 with a high sensitivity (596.1 μAm M(-1) cm(-2)), and a low detection limit (52 nM). Based on the respective advantages of POMs, CNTs and AuNPs, the nanocomposite multilayer POMs/CNTs/POMs/AuNPs will have special properties and high potential for application.

show abstract

Improvement of the electrochemical and electrocatalytic behavior of Prussian blue/carbon nanotubes composite via ionic liquid treatment

Cited by 33 publications

References 42 publications

Thin-Film Electrochemistry of Single Prussian Blue Nanoparticles Revealed by Surface Plasmon Resonance Microscopy

Thin-Film Electrochemistry of Single Prussian Blue Nanoparticles Revealed by Surface Plasmon Resonance Microscopy

Determining the depth of surface charging layer of single Prussian blue nanoparticles with pseudocapacitive behaviors

A ternary nanocomposite electrode of polyoxometalate/carbon nanotubes/gold nanoparticles for electrochemical detection of hydrogen peroxide

Contact Info

Product

Resources

About