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  • Electronic Resource  (5)
  • fuel cell  (2)
  • fuel cells  (2)
  • 82.80 Bi  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Impedance spectroscopy: a method for in situ characterization of experimental fuel cells
    Amsterdam : Elsevier
    Electrochimica Acta 38 (1993), S. 2115-2120 
    Details
    ISSN: 0013-4686
    Keywords: alkaline FC ; electrode structure ; fuel cell ; molten carbonate FC ; oxygen cathode
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0013-4686(93)80349-5
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation, morphology and effective electrocatalytic activity of gas evolving and gas consuming electrodes
    Amsterdam : Elsevier
    Electrochimica Acta 39 (1994), S. 1749-1756 
    Details
    ISSN: 0013-4686
    Keywords: electrocatalysis ; fuel cells ; gas evolving electrodes ; water electrolysis
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0013-4686(94)85160-3
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Laser desorption jet-cooling of organic molecules (1990)
    Springer
    Applied physics 51 (1990), S. 395-403 
    Details
    ISSN: 1432-0649
    Keywords: 35.80 s ; 82.80 Bi ; 47.45 Nd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Laser desorption followed by jet-cooling allows wavelength-selective as well as mass-selective detection of molecules desorbed from a surface without fragmentation. The cooling characteristics and detection sensitivity of laser desorption jet-cooling of organic molecules are investigated. From the rotational contour of the electronic origin of the S 1 ← S 0 transition of laser-desorbed anthracene, rotational cooling to 5–10 K is demonstrated. Vibrational cooling is studied for laser-desorbed diphenylamine, a molecule with low-energy vibrations, and a vibrational temperature below 15 K is found. The absolute detection sensitivity is determined for the perylene molecule. Using two-color (1+1) resonance enhanced multi-photon ionization (with a measured ionization efficiency of 0.25) for detection, it is found that one ion is produced in the detection region for every 2×105 perylene molecules evaporated from the desorption laser spot. A two-color (1+1) REMPI spectrum (400 points) of perylene is recorded using only 30 picogram of material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00329101
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Hydrogen fired PAFCs: an experimental investigation into the optimal utilization of impure, recycled hydrogen (2000)
    Springer
    Journal of applied electrochemistry 30 (2000), S. 323-331 
    Details
    ISSN: 1572-8838
    Keywords: fuel cell ; hydrogen recycle loop ; operation parameters ; PAFC operation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Phosphoric acid fuel cells (PAFCs) had been developed for cogeneration plants based on natural gas as fuel. Operation of phosphoric acid fuel cells on hydrogen requires recycling of unspent hydrogen from the anode exhaust for obtaining highest efficiency. But recycling rates are limited due to accumulation of inert gases. Theoretical calculations and experimental data on optimizing this operation mode with respect to highest electrical energy efficiency are compared. The results are verified in a 100 cm2 PAFC unit. From the data obtained with a Fuji 2 kW PAFC, the performance of large units with hydrogen recycling is predicted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003991420781
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Porosity and catalyst utilization of thin layer cathodes in air operated PEM-fuel cells (1998)
    Springer
    Journal of applied electrochemistry 28 (1998), S. 277-282 
    Details
    ISSN: 1572-8838
    Keywords: fuel cells ; PEMFC ; oxygen cathode ; electrode porosity ; mass transport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Better performance of and higher electrocatalyst utilization in proton-exchange membrane fuel cells equipped with thin film electrodes is achieved by exploiting pore forming additives in the electrode recipe formulation. Preparing the membrane–electrode assembly by a hot spraying procedure already provides 35% porosity. Additional coarse porosity is obtained by adding pore formers to the electrocatalyst slurry which is used for the hot spraying process. This allows for a better access of oxygen from air to the depth of the cathode. For air operation at ambient pressure and low catalyst loading of 0.15mgPtcm-2 a current density of 200mAcm-2 at 0.7V cell voltage can be obtained with such electrodes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003259531775
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    Paper (German National Licenses)
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