Electrochemical characterisation of Pd modified ceramic∣carbon electrodes: partially flooded versus wetted channel hydrophobic gas electrodes

Rabinovich, L.; Lev, Ovadia; Tsirlina, Galina A.

doi:10.1016/s0022-0728(99)00118-7

Cited by 34 publications

(27 citation statements)

References 31 publications

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“…Lev et al demonstrated the particular benefits of using organically-modified xerogels for oxygen and carbon dioxide gas sensing applications 52,53. The organically-modified hybrid materials were characterized by an open, rigid structure that allowed for rapid diffusion of gaseous molecules while inhibiting leaching of the internal electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Fluorinated Xerogel-Derived Microelectrodes for Amperometric Nitric Oxide Sensing

et al. 2008

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An amperometric fluorinated xerogel-derived nitric oxide (NO) microelectrode is described. A range of fluorine-modified xerogel polymers were synthesized via the co-hydrolysis and condensation of alkylalkoxy- and fluoroalkoxysilanes. Such polymers were evaluated as NO sensor membranes to identify the optimum composition for maximizing NO permeability while providing sufficient selectivity for NO in the presence of common interfering species. By taking advantage of both the versatility of sol–gel chemistry and the “poly(tetrafluoroethylene) (PTFE)-like” high NO permselective properties of the xerogels, the performance of the fluorinated xerogel-derived sensors was excellent, surpassing all miniaturized NO sensors reported to date. In contrast to previous electrochemical NO sensor designs, xerogel-based NO microsensors were fabricated using a simple, reliable dip-coating procedure. An optimal permselective membrane was achieved by synthesizing xerogels of methyltrimethoxysilane (MTMOS) and 20% (heptadecafluoro-1,1,2,2-tetrahydrodecyl)trimethoxysilane (17FTMS, balance MTMOS) under acid-catalyzed conditions. The resulting NO microelectrode had a conical tip of ~20 μm in diameter and ~55 mm in length, and exhibited sensitivities of 7.91 pA·nM−1 from 0.2 to 3.0 nM (R2 = 0.9947) and 7.60 nA·mM−1 from 0.5 to 4.0 μM (R2 = 0.9999), detection limit of 83 pM (S/N = 3), response time (t95%) of <3 sec, and selectivity (logKNO,jamp) of −5.74, <−6, <−6, <−6, <−6, −5.84, and −1.33 for j = nitrite, ascorbic acid, uric acid, acetaminophen, dopamine, ammonia/ammonium, and carbon monoxide. In addition, the sensor proved functional up to 20 d, maintaining ≥90% of the sensor's initial sensitivity without serious deterioration in selectivity.

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Section: Introductionmentioning

confidence: 99%

Fluorinated Xerogel-Derived Microelectrodes for Amperometric Nitric Oxide Sensing

et al. 2008

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“…In electrochemistry, the electrodes covered with metallic nanoparticles are widely studied. For example, the preparation of spatially distributed noble metal particles deposited on high surface area metal oxides [3,4], activated carbon supports [5,6], or in polymeric films on electrodes [7 -10] and fabrication on passive metal surfaces [11] exhibited excellent catalytic activities. Further these types of electrodes offers improved catalytic activities for various technologically important reactions such as hydrogen evolution, methanol oxidation and the four-electron reduction of oxygen to water.…”

Section: Introductionmentioning

confidence: 99%

The Interaction of Iodide Film with Platinum Microparticles on Different Electrode Materials for Various Electrocatalytic Reactions

Thiagarajan

Chen

2008

Electroanalysis

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The electrochemical depositions of Pt microparticles and KI film were successfully carried out on glassy carbon electrodes (GCE), gold electrodes (GE), and indium tin oxide electrodes (ITO). The electrochemical studies of Pt micro/KI film on GCE show that the film was stable, active at pH 1.5 electrolyte solutions. The Pt microparticle/KI film modified ITO electrodes were examined by using scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques. The SEM and AFM results show that the Pt particle sizes were in the range of 120 nm -1.4 mm, respectively. The proposed film on GCE shows efficient electrocatalysis for oxygen, Cr 2 O 2À 7 reduction by using cyclic voltammetry. Further the electrochemical oxidation of sodium meta-arsenite (As(III)), H 2 O 2 were successfully carried out and the detection of H 2 O 2 in real samples has been validated.

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“…electrochemical reactions [1][2][3][4][5][6][7][8][9][10][11][12][13]. Relevant concerns regarding the preparation of efficient Pd catalysts include the effects of support pretreatment, reducing agents, surfactants and electrode preparation.…”

mentioning

confidence: 99%

“…Other work has demonstrated the high activity of carbon-black-supported Pd (promoted with Ru) for hydrogen peroxide electroreduction, which makes this system promising as a cathode catalyst for fuel cells using H 2 O 2 as oxidant [14]. Numerous electrochemical studies of Pd/C systems were performed [2, 3,5,8,10,[12][13][14][15] to explore the surface-active states (or sites) of dispersed Pd in various electrolyte solutions. This seems to be the most active electrocatalyst for the anodic oxidation of various organics in low pH solution [16,17].…”

mentioning

confidence: 99%

Cyclovoltammetric studies of carbon materials-supported palladium

Hofman

Świątkowski

Pakuła

et al. 2012

Reac Kinet Mech Cat

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Various Pd amounts (5 and 20 %wt) were chemically deposited on two different carbon materials (activated carbon and carbon black). Support materials were characterized using low-temperature N 2 adsorption and FTIR spectroscopy. SEM images and X-ray diffraction patterns were obtained for the samples tested. Cyclic voltammetric curves in 0.1 M H 2 SO 4 were recorded over a variable sweep potential range for carbon materials with and without Pd. For comparison, the same electrochemical measurements were performed for powdered palladium. The hydrogen electro-oxidation potential decreased and the removal of adsorbed hydrogen by activated carbon-supported palladium was facilitated, which enables these systems to be used as anodes in hydrogen-oxygen fuel cells.

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Electrochemical characterisation of Pd modified ceramic∣carbon electrodes: partially flooded versus wetted channel hydrophobic gas electrodes

Cited by 34 publications

References 31 publications

Fluorinated Xerogel-Derived Microelectrodes for Amperometric Nitric Oxide Sensing

Fluorinated Xerogel-Derived Microelectrodes for Amperometric Nitric Oxide Sensing

The Interaction of Iodide Film with Platinum Microparticles on Different Electrode Materials for Various Electrocatalytic Reactions

Cyclovoltammetric studies of carbon materials-supported palladium

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