Synthesis, characterization and performance of vanadium hexacyanoferrate as electrocatalyst of H2O2

Tsiafoulis, Constantinos G.; Trikalitis, Pantelis N.; Prodromidis, Mamas I.

doi:10.1016/j.elecom.2005.10.001

Cited by 124 publications

(62 citation statements)

References 39 publications

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“…The use of mediators have been proved to be an effective way to overcome or restric these problems [2]. The modification of electrode surfaces with electroactive materials has contributed to the improvement of the selectivity and sensitivity of the electroanalytical methods.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Performances of Pure and Mixed Hexacyanoferrates of Cu and Pd for the Reduction of Hydrogen Peroxide

Guadagnini¹,

Giorgetti²,

Tarterini³

et al. 2010

Electroanalysis

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A study on the performances of mixed hexacyanoferrates of Cu and Pd (CuPdHCFs), potentiodynamically grown on glassy carbon surfaces, was carried out. Morphological (SEM-EDX analysis) and electrochemical characterizations were performed, and the electrocatalytic ability of films with various compositions was tested by chronoamperometry. CuPdHCFs were found to display good electrocatalytic performances, with a maximum sensitivity of 45.3 mA M À1 cm À2 at 0.0 V vs. SCE (depending on the Cu and Pd ratio), against the value of 9.1 mA M À1 cm À2 obtained with pure copper hexacyanoferrate (CuHCF). Additionally, mixed hexacyanoferrates showed a higher pH and operational stability. The key role of Cu in Cu-based hexacyanoferrates was investigated and highlighted.

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Section: Introductionmentioning

confidence: 99%

Electrocatalytic Performances of Pure and Mixed Hexacyanoferrates of Cu and Pd for the Reduction of Hydrogen Peroxide

Guadagnini¹,

Giorgetti²,

Tarterini³

et al. 2010

Electroanalysis

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“…The high catalytically activity and selectivity of PB films and analogues regarding the cathodic reduction of hydrogen peroxide has been previously reported. [3][4][5][6] The use of hexacyanometallates containing transition metals has also been investigated to modify electrode surfaces and the electrocatalytic properties of these interfaces have also A Biosensor based on Immobilization of Lactate Oxidase in a PB-CTAB Film J. Braz. Chem.…”

Section: Introductionmentioning

confidence: 99%

“…The reduced form (Fe 2+ ) is catalytically active towards the electron-transfer step involving hydrogen peroxide, water being formed as a final product. At positive potentials, PB films are also able to mediate the oxidation of hydrogen peroxide to oxygen in a process that takes place with the participation of the low-spin Fe(CN) 6 3-species. The high catalytically activity and selectivity of PB films and analogues regarding the cathodic reduction of hydrogen peroxide has been previously reported.…”

Section: Introductionmentioning

confidence: 99%

“…The high catalytically activity and selectivity of PB films and analogues regarding the cathodic reduction of hydrogen peroxide has been previously reported. [3][4][5][6] The use of hexacyanometallates containing transition metals has also been investigated to modify electrode surfaces and the electrocatalytic properties of these interfaces have also been demonstrated regarding oxidative processes. [7][8][9][10][11][12] A main drawback found when PB modified electrodes are applied for electroanalytical purposes is the poor stability of the film at potentials where Prussian White is cathodically generated.…”

Section: Introductionmentioning

confidence: 99%

“…The PB film was deposited by potential cycling between −0.2 and 1.0 V at 50 mV s -1 in a solution containing 0.6 mmol L -1 K 3 Fe(CN) 6 , 0.6 mmol L -1 Fe(III), 0.1 mol L -1 KCl, 1 mmol L -1 CTAB at pH around 1.7 maintained with HCl. After film formation, the stability of the electrochemical response was verified by cyclic voltammetry in a 0.1 mol L -1 KCl solution (pH 1.7).…”

Section: Modification Of the Electrode Surface And Enzyme Immobilizationmentioning

confidence: 99%

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A biosensor based on immobilization of lactate oxidase in a PB-CTAB film for FIA determination of lactate in beer samples

Lowinsohn

Bertotti

2008

J. Braz. Chem. Soc.

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No presente trabalho são apresentados resultados referentes à fabricação de um biossensor para análise de lactato. O dispositivo foi preparado imobilizando-se a enzima lactato oxidase em filme de Azul da Prússia (PB, sigla em inglês) depositado na superfície de eletrodo de carbono vítreo em soluções de CTAB. Nestas condições experimentais observou-se melhoria na sensibilidade e seletividade das determinações de lactato, as quais foram conduzidas em sistema FIA com detecção amperométrica. Nas condições otimizadas (pH = 6,9 e E = −0,1 V), obteve-se curva analítica com limite superior igual a 0,28 mmol L -1 e um limite de detecção de 0,84 µmol L -1 . A repetibilidade do método foi avaliada por meio de injeções consecutivas de amostras de lactato 0,28 mmol L -1 , obtendo-se desvio padrão de 2,2 % (n = 18). O método foi aplicado em amostras de cerveja e houve boa concordância entre os resultados obtidos e aqueles oriundos do uso de procedimento espectrofotométrico de referência.An amperometric lactate biosensor with lactate oxidase immobilized into a Prussian Blue (PB) modified electrode was fabricated. The advantage of using cetyltrimethylammonium bromide (CTAB) in the electrodeposition step of PB films onto glassy carbon surfaces was confirmed taking into account both the stability and sensitivity of the measurements. The biosensor was used in the development of a FIA amperometric method for the determination of lactate. Under optimal operating conditions (pH = 6.9, E = −0.1 V), the linear response of the method was extended up to 0.28 mmol L -1 lactate with a limit of detection of 0.84 µmol L -1 . The repeatability of the method for injections of a 0.28 mmol L -1 lactate solution was 2.2 % (n = 18). The usefulness of the method was demonstrated by determining lactate in beer samples and the results were in good agreement with those obtained by using a reference spectrophotometric enzyme method.Keywords: lactate, biosensor, prussian blue modified electrodes, CTAB, FIA amperometric detection, beer IntroductionThe relevance of metal hexacyanoferrates for electroanalytical chemistry was firstly demonstrated in the pioneering studies of Itaya et al. 1,2 involving the electrocatalysis of oxygen and hydrogen peroxide reduction at surfaces covered by Prussian Blue (PB, iron(III) hexacyanoferrate(II)) films. The transfer of electrons and the movement of small hydrated counter-cations through the channels and holes of the solid for charge compensation is a typical feature of this kind of compound. Owing to the zeolite nature of metal hexacyanoferrates, their ability as effective three-dimensional electrocatalysts has been extensively recognized.Once sufficient negative potentials are applied to PB modified electrodes, electrons are injected into the film and the so-called Prussian-White film is generated which arises from the reduction of a high-spin Fe 3+ . The reduced form (Fe 2+ ) is catalytically active towards the electron-transfer step involving hydrogen peroxide, water being formed as a final product. At positive pot...

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Divalent Ion Selectivity in Capacitive Deionization with Vanadium Hexacyanoferrate: Experiments and Quantum‐Chemical Computations

Singh

Lee

et al. 2021

Adv Funct Materials

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Selective removal of ions from water via capacitive deionization (CDI) is relevant for environmental and industrial applications like water purification, softening, and resource recovery. Prussian blue analogs (PBAs) are proposed as an electrode material for selectively removing cations from water, based on their size. So far, PBAs used in CDI are selective toward monovalent ions. Here, vanadium hexacyanoferrate (VHCF), a PBA, is introduced as a new electrode material in a hybrid CDI setup to selectively remove divalent cations from water. These electrodes prefer divalent Ca 2+ over monovalent Na + , with a separation factor, β Ca/Na ≈3.5. This finding contrasts with the observed monovalent ion selectivity by PBA electrodes. This opposite behavior is understood by density functional theory simulations. Furthermore, coating the VHCF electrodes with a conducting polymer (poly-pyrrole, doped with poly-styrenesulphonate) prevents the contamination of the treated water following the degradation of the electrode. This facile and modular coating method can be effortlessly extended to other PBA electrodes, limiting the extent of treated water contamination during repeated cycling. This study paves the way for tunable selectivity while extending the library of electrodes that can be successfully used in (selective) CDI.

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Synthesis, characterization and performance of vanadium hexacyanoferrate as electrocatalyst of H2O2

Cited by 124 publications

References 39 publications

Electrocatalytic Performances of Pure and Mixed Hexacyanoferrates of Cu and Pd for the Reduction of Hydrogen Peroxide

Electrocatalytic Performances of Pure and Mixed Hexacyanoferrates of Cu and Pd for the Reduction of Hydrogen Peroxide

A biosensor based on immobilization of lactate oxidase in a PB-CTAB film for FIA determination of lactate in beer samples

Divalent Ion Selectivity in Capacitive Deionization with Vanadium Hexacyanoferrate: Experiments and Quantum‐Chemical Computations

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