Dynamic Behavior of Segmented-in-Series Tubular Solid Oxide Fuel Cell upon Discharge

Liu, Bin; Muroyama, Hiroki; Matsui, Toshiaki; Tomida, Kazuo; Kabata, Tatsuo; Eguchi, Koichi

doi:10.1149/2.099203jes

Cited by 19 publications

(3 citation statements)

References 35 publications

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“…Furthermore, the relation between the anodic peak potential of PY and pH in the pH range (3)(4)(5)(6)(7)(8)(9)(10)(11) (Inset of Fig. 5) is linear with the regression equation (Eq.…”

Section: Resultsmentioning

confidence: 94%

“…The electrochemical response of PY was obtained at bare GC with relatively large overpotential and small anodic peak current due to surface fouling by the oxidation products. 2,4,7 A slight increase in the anodic peak current and less positive shift in the anodic peak potential was achieved at GC/CuO. On the other hand, upon using CNTs as a modifier of GC and a catalyst support for CuO, higher current response and less positive overpotential shift were achieved in case of GC/CNTs and GC/CNTs/CuO compared to bare GC and GC/CuO.…”

Section: Resultsmentioning

confidence: 97%

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Effective and Facile Determination of Vitamin B6 in Human Serum with CuO Nanoparticles/Ionic Liquid Crystal Carbon Based Sensor

Atta

Galal

El-Ads

et al. 2017

J. Electrochem. Soc.

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New insights in fabrication of a sensitive, carbon nanotubes-based electrochemical sensor for determination of vitamin B 6 (PY) are presented in this work. This was achieved by exploring the interesting properties of a conductive composite based on manual casting of successive layers of carbon nanotubes mixed with ionic liquid crystal and CuO nanoparticles (GC/(ILC-CNTs)/CuO) over glassy electrode surface. The proposed sensor was successfully used for the simultaneous determination of binary mixtures of PY and other vitamins (B 2 , B 9 , B 12 or C) with good resolution. Under optimized conditions, a linear calibration curve was obtained for the determination of vitamin B 6 in blood serum within the range 0.5 μmol L −1 to 50 μmol L −1 with sensitivity of 877 μA/mmol L −1 , detection limit of 3.09 nmol L −1 and limit of quantification 10.31 nmol L −1 . Furthermore, the recovery results of real blood serum samples proved excellent using the proposed composite which makes it a potential candidate for PY routine analysis.

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“…Furthermore, the relation between the anodic peak potential of PY and pH in the pH range (3)(4)(5)(6)(7)(8)(9)(10)(11) (Inset of Fig. 5) is linear with the regression equation (Eq.…”

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 97%

Effective and Facile Determination of Vitamin B6 in Human Serum with CuO Nanoparticles/Ionic Liquid Crystal Carbon Based Sensor

Atta

Galal

El-Ads

et al. 2017

J. Electrochem. Soc.

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show abstract

“…Furthermore, in the FC tests, supplied gas humidity is limited mostly to around 40%. 8,16,17 On the other hand, 50 to 90% humidified gas is usually supplied for the EC operation. 13,18,19 Due to the strong dependence of Ni sinterability on humidity, 20 sole contribution of the operating modes of FC and EC on microstructural evolutions can be hardly derived from the literature.…”

mentioning

confidence: 99%

Polarization Characteristics and Microstructural Changes of Solid Oxide Fuel Cell and Solid Oxide Electrolysis Cell Fuel Electrodes

Shimura

Jiao

Shikazono

2017

J. Electrochem. Soc.

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In this study, composite Nickel-yttria stabilized zirconia (Ni-YSZ) identically fabricated fuel electrodes were operated as solid oxide fuel cell (SOFC) and solid oxide electrolysis cell (SOEC) under the same gas environment, and their corresponding performances and microstructural evolutions were quantitatively evaluated. Fuel electrode performance degraded during the FC operation, whereas the performance was enhanced during the EC operation. Impurity segregation was clearly observed using scanning electron microscopy (SEM) observation with low acceleration voltage. Severe segregation phenomenon of impurity phase was observed after the EC mode operation, while less segregation of impurity segregation was found after the FC mode operation. From the three dimensional microstructure reconstructions based on focused ion beam-scanning electron microscopy technique, triple phase boundary (TPB) density showed drastic decrease after the EC mode operation due to the blocking of TPB by segregated impurity phase, which contradicts to the performance enhancement during the EC operation. Contrasting influences of FC and EC operation modes on electrochemical performance and microstructural evolutions were clearly observed. Performance enhancement after 100 hours of EC operation implies that impurity segregation cannot be simply regarded as one of the causes of electrode performance degradation.

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Electroanalysis of Pyridoxine at Copper Nanoparticles Modified Polycrystalline Gold Electrode

et al. 2015

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1IntroductionPyridoxine( 4,5-bis(hydroxymethyl)-2-methylpyridin-3-ol), as o-called Vitamin B6, is aw ater soluble vitamin. It is involved in several biochemical reactions such as the metabolism of amino acids and glycogen and the synthesis of the neurotransmitters serotonin,d opamine and norepinephrine [1][2][3].P yridoxine has several functions includingf or example,b alancing of the hormonal changes in women, assisting in the immune system and the growth of new cells,a nd further is involved in the nucleic acids RNAa sw ell as DNAa nd linkedt oc anceri mmunity and fights the formation of the toxic chemicalh omocysteine, which is detrimental to the heart muscle.P yridoxine also exhibits antioxidant activity [4][5][6][7] and acts as ac ofactor of more than one hundred enzymes whichc atalyze the phosphorolytic cleavage of glycogen and aw ide variety of metabolic reactions of amino acids [5].L ack of this vitamin may cause several diseases such as anemia, nerve damage, seizures,s kin problems,a nd sores in the mouth [1].Because of the physiologicali mportance of pyridoxine, severalm ethodsh ave been developedf or its assaying, includingf luorimetry [1-6],s pectrophotometry, [7][8][9][10][11], high performance liquid chromatography [12][13][14][15],flow injection analysis [16][17][18],c apillary zone electrophoresis [19,20] and potentiometric membrane sensor [21,22]. Some of these methods are cumbersome,t ime-consuming and expensive.O nt he other hand, the determination of water-soluble vitamins in various samples is ratherd ifficult due to the chemical instability and complexity of the matrices in whicht hey usuallye xist [23].Asuitable methods hould overcomet hese difficulties in addition to achieving stability and fastness.E lectrochemical methods are expected to be ar emedial solution for such problems as they are advantageouslys imple,s ensitive andn ot so time-consuming. Voltammetric analysis of severald rugs includingp yridoxine [24][25][26] has been also reported [24,[27][28][29][30][31]. In theser eports [24][25][26],p yridoxine is oxidized at large potential, and thus the analysis might encounter with the interference of more easily oxidizable biological substances.I nt he present work the analysis of pyridoxine on nano-Cu/Aue lectrode at relatively low potentialsw ill be introduced. Thea bility of pyridoxine to formac omplexw ith copper [32]i ons is utilized for the analysis of pyridoxine using square wave voltammetry which has an advantage of high immunity against charging current and consequently ahigh sensitivity. Reagentsa nd SolutionsAll solutions were prepared using bidistilled water. All chemicals were of analyticalg rade and used withoutf urther purification. Pyridoxine (vitamin B6) standard soluAbstract:P yridoxine is analyzed using square wave voltammetry (SWV) at copper nanoparticles (nano-Cu) modified poly-crystalline gold electrode( nano-Cu/Au). Nano-Cu/Aui sf abricated by ap otential scan electrodeosition technique.N ano-Cu/Aue lectrodeh as been characterized morphologically and electrochem...

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Dynamic Behavior of Segmented-in-Series Tubular Solid Oxide Fuel Cell upon Discharge

Cited by 19 publications

References 35 publications

Effective and Facile Determination of Vitamin B6 in Human Serum with CuO Nanoparticles/Ionic Liquid Crystal Carbon Based Sensor

Effective and Facile Determination of Vitamin B6 in Human Serum with CuO Nanoparticles/Ionic Liquid Crystal Carbon Based Sensor

Polarization Characteristics and Microstructural Changes of Solid Oxide Fuel Cell and Solid Oxide Electrolysis Cell Fuel Electrodes

Electroanalysis of Pyridoxine at Copper Nanoparticles Modified Polycrystalline Gold Electrode

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