Infrared spectroelectrochemical analysis of potential dependent changes in cobalt hexacyanoferrate and copper hexacyanoferrate films on gold electrodes

Hosseini, Pouya; Wittstock, Günther; Brand, Izabella

doi:10.1016/j.jelechem.2017.12.029

Cited by 19 publications

(25 citation statements)

References 48 publications

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“…The LbL deposition followed the procedure described before. 41 Briefly, the substrate was mounted on a frame at the end of a computercontrolled homemade mechanical hand-robot (operated by Robo Pro software; Fischer Technik, Waldachtal, Germany). The robot transferred the substrate in 30 cycles between the vials containing 0.15 M CuCl 2 in water (immersion time 20 min), water for rinsing, 0.125 M K 3 [Fe(CN) 6 ] in water (immersion time 20 min), and water for rinsing again.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…This was recently highlighted by an in operando infrared reflection−absorption spectroscopic study on cobalt hexacyanoferrate (CoHCF, Co II [Fe III (CN) 6 ] 2/3 •nH 2 O) and CuHCF. 41 The large variety of structural features is further enriched when considering the film's growth on different substrate materials, which has not yet received the same attention as other properties of MHCMs.…”

Section: ■ Introductionmentioning

confidence: 99%

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Morphology and Conductivity of Copper Hexacyanoferrate Films

et al. 2020

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Films of conductive coordination network compounds are interesting as functional materials for charge storage, electrocatalysis, electrochromic switching, or conversion of light. The electrical conductivity depends on not only intrinsic material properties but also grain boundaries. Copper hexacyanoferrate shows a remarkable variation in film morphologies depending on the preparation route. Conductive films can only be obtained for continuous crystalline films that have been received by a combination of sonication-assisted casting and vapor-assisted conversion. Electrical conductivities of these films are higher than those of powder pellets with a similar crystal structure. Temperature-dependent and humidity-dependent measurements on powder pellets revealed the activation energies for charge transport. Thermogravimetric analysis, temperature-dependent X-ray diffraction data, and humidity-dependent measurements on powder pellets revealed the activation energies for charge transport and the role of proton conductivity.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Morphology and Conductivity of Copper Hexacyanoferrate Films

et al. 2020

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“…Although not strictly classified as MOFs, metal hexacyanometallates of the Prussian blue family including cobalt and copper hexacyanoferrate prepared as thin films on a gold working electrode have been investigated by polarisation modulation IR SEC (in reflectance mode). [101] Here, coordination of a metal ion to either the C-or N-terminus of the CN À bridging ligand can be identified from IR by the distinct frequency of the T 1u mode of the cyanide stretching mode n(CN), the position revealing the coordination and symmetry around the CN À bridging ligand. SEC analysis provided unambiguous evidence for the oxidation of N-coordinated Co 2þ to Co 3þ in K 2 Co II [Fe II (CN) 6 ] as the first electrochemical oxidation process, followed by partial oxidation of the C-coordinated Fe 2þ to Fe 3þ .…”

Section: Infrared Secmentioning

confidence: 99%

Spectroelectrochemistry: A Powerful Tool for Studying Fundamental Properties and Emerging Applications of Solid-State Materials Including Metal–Organic Frameworks

D’Alessandro¹,

Usov²

2021

Aust. J. Chem.

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Spectroelectrochemistry (SEC) encompasses a broad suite of electroanalytical techniques where electrochemistry is coupled with various spectroscopic methods. This powerful and versatile array of methods is characterised as in situ, where a fundamental property is measured in real time as the redox state is varied through an applied voltage. SEC has a long and rich history and has proved highly valuable for discerning mechanistic aspects of redox reactions that underpin the function of biological, chemical, and physical systems in the solid and solution states, as well as in thin films and even in single molecules. This perspective article highlights the state of the art in solid-state SEC (ultraviolet–visible–near-infrared, infrared, Raman, photoluminescence, electron paramagnetic resonance, and X-ray absorption spectroscopy) relevant to interrogating solid state materials, particularly those in the burgeoning field of metal–organic frameworks (MOFs). Emphasis is on developments in the field over the past 10 years and prospects for application of SEC techniques to probing fundamental aspects of MOFs and MOF-derived materials, along with their emerging applications in next-generation technologies for energy storage and transformation. Along with informing the already expert practitioner of SEC, this article provides some guidance for researchers interested in entering the field.

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“…By cycling the polarization of the light, a difference spectrum of the bulk (s-polarization) and at the electrode surface (p-polarization) can be obtained. PM-IRRAS has been reported in literature as, among others, a method for the study of self-assembled monolayers 59,60 and lipid bilayers [54][55][56][57] . For a more in-depth description of SNIFTIRS and PM-IRRAS the authors recommend reading the work of Guidelli 15 , Bard 61 and Alkire et al 57 .…”

Section: Sniftirs and Pm-irrasmentioning

confidence: 99%

“…Concerning SEIRAS in reflection IR-SEC, electrode materials used are Ni 13,35,41 , Pt 12,[36][37][38][39]48,62 , Pd 43,46,47 and Au 44,45,60,63,64 . While only Liu et al report on using the reflecting electrodes for surface enhanchement 44,45 , it is unlikely that the Au electrodes used by Hosseini et al 60 , Su et al 63 and Villalba et al 64 don't report any enhancement. For Pt, Pd and Ni, SEIRAS has been reported in the past 65 , but none of the papers above mentioned FTIR-SEC papers report this effect.…”

Section: Electrode Materials and Seiras In Reflection Ir-secmentioning

confidence: 99%

Surface enhanced vibrational spectroscopy : implementations in lab-on-a-chip

Lozeman

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In this chapter an introduction to the multiscale catalytic energy conversion (MCEC) program and consortium will be given. The positioning of this thesis within MCEC will be discussed followed by the problem statement of the thesis. Next the overall motivation for the research performed in this thesis will be presented. Finally the thesis outline is presented, and each chapter will be described briefly.

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Infrared spectroelectrochemical analysis of potential dependent changes in cobalt hexacyanoferrate and copper hexacyanoferrate films on gold electrodes

Cited by 19 publications

References 48 publications

Morphology and Conductivity of Copper Hexacyanoferrate Films

Morphology and Conductivity of Copper Hexacyanoferrate Films

Spectroelectrochemistry: A Powerful Tool for Studying Fundamental Properties and Emerging Applications of Solid-State Materials Including Metal–Organic Frameworks

Surface enhanced vibrational spectroscopy : implementations in lab-on-a-chip

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