VSE knjižnice (vzajemna bibliografsko-kataložna baza podatkov COBIB.SI)
  • Co poisoning resistance of anode in a phosphotungstic acid electrolyte-based fuel cell
    Hočevar, Stanko, 1947- ; Staiti, Pietro ; Giordano, Nicola
    A new type of high performance, low-temperature, low-pressure fuel cell (PWAFC) based on concentrated solution of ▫$H_3PW_{12}O_{40}$▫ as proton conducting electrolyte has been developed. Beside its ... very simple construction and low capital costs, this fuel cell demonstates remarkable resistance to carbon monoxide poisoning during its work. Feeding the anode with ▫$H_2$▫ containing 33 ppm CO for several hours at current density of 2.0 ▫$kA/m^2$▫ did not provoke any cell voltage drop. When the CO concentration was raised to 1000 ppm, the cell could still work at current density of 0.5 ▫$kA/m^2$▫, giving about 0.5 V. The CO poisoning rates obtained at this concentration of CO and at the cell temperature of 300 K are around 1 mV/min, nearly the same as those measured in PEMFC for the CO concentration of 30 ppmat 343 K. The enhanced rewsistance of PWAFC toward CO poisoning is tentatively explained by the Wacker-type oxidation mechanism of CO on the Pt/C catalyst in the presence of heteropolyacid solution wetting the microporesof the anode catalyst layer.
    Vir: New materials for fuel cell and modern battery systems II (Str. 297-308)
    Vrsta gradiva - prispevek na konferenci
    Leto - 1997
    Jezik - angleški
    COBISS.SI-ID - 789530

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