Interfacial Role of Cesium in Prussian Blue Films

Catalán, Raquel Guillén; Agrisuelas, Jerónimo; Cuenca, Alejandro; Garcı́a-Jareño, J.J.; Roig, A.; Vicente, F.

doi:10.1149/2.1061509jes

Cited by 3 publications

(2 citation statements)

References 57 publications

(111 reference statements)

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“…This band is due to the electronic transition associated with intervalence chargetransfer. 36,37 With the insertion of K + ions, the UV−vis spectrum is significantly declined due to the transformation of PB into PW that does not show any distinct bands in the visible range. Our SPRM apparatus adopts a red beam as the excitation light whose center wavelength is 680 nm with a bandwidth of 10 nm (pink region in Figure 4b).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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

et al. 2017

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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.

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Section: ■ Results and Discussionmentioning

confidence: 99%

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

et al. 2017

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“…This work was carried out by means of simultaneous measurements of resonant frequency of quartz as well as the motional resistance of the Butterworth-Van Dyke equivalent circuit model measured by means of an electrochemical quartz crystal microbalance (REQCM) during successive cyclic voltammograms. The simultaneous measure of current, mass and motional resistance magnitudes allows to explain the differences between the electrochemical cation insertion processes in a solution of CsCl salt with respect to the cation insertion observed in KCl aqueous solutions [12]. Accordingly, the main goal of this work was to study in depth the different processes which involve the PB electrochemistry during the PB-ES switch, where ES is the reduced form (Everitt's salt).…”

Section: Introductionmentioning

confidence: 99%