Calorimetry of Pd+D Codeposition in a Fleischmann-Pons Dewar Cell
Abstract
Codeposition of Pd and D from solution onto a Cu rod produced large and reproducible excess heat (EH) events. Positive feedback occurs in which EH increases with cell temperature, and with increasing cell current and/or application of a 0.2500 W calibration heater. Cell Temperature (CT) vs time graphs reveal that CT fails to return to its original baseline value after the internal cell heater is turned off. Excess Power (EP) exceeding 0.40 W was observed. A Cu rod (length=2.5 cm diameter=0.4 cm) served as the cathode. A spirally wound Pt wire was the anode. Initial composition of the electrolyte (91 cm^3) was 0.025 M PdCl2 + 0.15 M ND_4Cl + 0.15 M ND_4OD in D_2O (Isotech, Inc. 99.9 at. % D).The codeposition process used a constant current of 6 mA. Deposition of Pd from solution onto the Cu cathode was completed after one day. EP commenced during codeposition and increased with increased cell current.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2001
- Bibcode:
- 2001APS..MARV14004M