2012
DOI: 10.1007/s00340-012-5303-3
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A novel concept for in situ gas-phase laser Raman spectroscopy for solid oxide fuel cell research

Abstract: A planar solid oxide fuel cell (SOFC) operated with hydrogen at T=1123 K was equipped with an optically transparent anode flow field to apply species concentration measurements by 1D laser Raman scattering. The flow channels had a cross section of 3 mm × 4 mm and a length of 40 mm. The beam from a pulsed high-power frequency-doubled Nd:YAG laser (λ=532 nm) was directed through one channel and the Raman scattered light from different molecular species was imaged onto an intensified CCD camera. The main goal of … Show more

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Cited by 7 publications
(7 citation statements)
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“…Although microscopic mechanisms of the electrode reactions can be evaluated by well-known electrochemical methods, the resultant information is usually cumulative, except for the microelectrode techniques. One important complementary technique enabling real-time analysis of the SOFC reactions is the Raman spectroscopy, successfully applied for a variety of model systems, processes and fuel cell materials [4][5][6][7][8][9][10][11][12][13]. Due to low penetration depth of the excitation radiation, however, most approaches known in the literature (e.g., [5][6][7][8][9][10][11][12][13]) are mainly based on the Raman spectra collected from the outer boundaries of model electrochemical cells, primarily surfaces of the electrodes and solid electrolyte membranes.…”
Section: Introductionmentioning
confidence: 99%
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“…Although microscopic mechanisms of the electrode reactions can be evaluated by well-known electrochemical methods, the resultant information is usually cumulative, except for the microelectrode techniques. One important complementary technique enabling real-time analysis of the SOFC reactions is the Raman spectroscopy, successfully applied for a variety of model systems, processes and fuel cell materials [4][5][6][7][8][9][10][11][12][13]. Due to low penetration depth of the excitation radiation, however, most approaches known in the literature (e.g., [5][6][7][8][9][10][11][12][13]) are mainly based on the Raman spectra collected from the outer boundaries of model electrochemical cells, primarily surfaces of the electrodes and solid electrolyte membranes.…”
Section: Introductionmentioning
confidence: 99%
“…One important complementary technique enabling real-time analysis of the SOFC reactions is the Raman spectroscopy, successfully applied for a variety of model systems, processes and fuel cell materials [4][5][6][7][8][9][10][11][12][13]. Due to low penetration depth of the excitation radiation, however, most approaches known in the literature (e.g., [5][6][7][8][9][10][11][12][13]) are mainly based on the Raman spectra collected from the outer boundaries of model electrochemical cells, primarily surfaces of the electrodes and solid electrolyte membranes. The electrochemical reaction zones where the majority of ionic and electronic charge carriers are generated, such as the area in vicinity of the triple-phase boundary (TPB), can hardly be achieved to a sufficient extent by viewing the surfaces and edges of the electrode systems.…”
Section: Introductionmentioning
confidence: 99%
“…Spontaneous Raman scattering is one of the standard techniques for this purpose, but it also has some drawbacks. For example, low signal intensities require high laser pulse energies with the risk of damage to optical components, or of plasma generation in the focal zone . For minor species (≲0.1%) detection, usually signal‐enhancement methods such as optical resonators and hollow‐core photonic crystal fibers have to be applied .…”
Section: Introductionmentioning
confidence: 99%
“…The high operation temperature (773-1273 K) of SOFCs makes the spatial characterization more difficult. Vibrational Raman Spectroscopy (12) and IR Thermography (13) can be employed for diagnosing the spatial concentration and temperature, respectively; however, both of them are quite expensive and they require replacement of the gas distribution plates by transparent components. Although the segmentation method is easy to implement on tubular-SOFCs (3,7,11,14,15), it is quite laborious to apply on planar-SOFCs (2).…”
Section: Introductionmentioning
confidence: 99%