Benziger Group

1. Benziger Group Electro-osmotic Drag Observations and Results Monday, July 7 2008 PrincetonUniversity

2. 06/27/08 – IV Sweep # 1 – T(FC) = 50°C • First ARBIN test with H2 • Current ramp (CR) to 1.8A, followed by current hold (CH): Rint (before CR) = 0.390 Ω :: Rint (after CH) = 0.256 Ω H2 = 410 mL/min :: N2 = 200 mL/min PrincetonUniversity

3. 06/30/08 – IV Sweep # 1 – T(FC) = 50.8°C • Current ramp to 1.8A, followed by current hold: Rint (before CR) = 0.608 Ω :: Rint (after CH) = 0.359 Ω H2 = 410 mL/min :: N2 = 200 mL/min Mass Transfer Limitation Region: Where is it?? PrincetonUniversity

4. 06/30/08 – IV Sweep # 1 – T(FC) = 50.8°C Rint (before CR) = 0.608 Ω :: Rint (after CH) = 0.359 Ω H2 = 410 mL/min :: N2 = 200 mL/min Voltage vs. Time during 1.8 A Current Hold step PrincetonUniversity

5. 06/30/08 – IV Sweep #2 – T(FC) = 52.1°C • Current ramp to 1.9A, followed by current hold: Rint (before CR) = 0.807 Ω :: Rint (after CH) = 0.367 Ω H2 = 410 mL/min :: N2 = 200 mL/min Mass Transfer Limitation Region: Where is it?? PrincetonUniversity

6. 06/30/08 – IV Sweep #2 – T(FC) = 52.1°C Rint (before CR) = 0.807 Ω :: Rint (after CH) = 0.367 Ω H2 = 410 mL/min :: N2 = 200 mL/min Voltage vs. Time during 1.9 A Current Hold step PrincetonUniversity

7. 06/30/08 – IV Sweep #3 – T(FC) = 51.2°C • Current ramp to 1.9A, followed by current hold: Rint (before CR) = 0.463 Ω :: Rint (after CH) = 1.82 Ω H2 = 410 mL/min :: N2 = 100 mL/min Mass Transfer Limitation Region: Where is it?? PrincetonUniversity

8. 06/30/08 – IV Sweep #3 – T(FC) = 51.2°C Rint (before CR) = 0.463 Ω :: Rint (after CH) = 1.82 Ω H2 = 410 mL/min :: N2 = 100 mL/min Voltage vs. Time during Current Hold step PrincetonUniversity

9. 06/30/08 – IV Sweep #4 – T(FC) = 80°C • Current ramp to 1.2A, followed by current hold: Rint (before CR) = 0.455 Ω :: Rint (after CH) = 0.750 Ω H2 = 410 mL/min :: N2 = 100 mL/min Mass Transfer Limitation Region: Where is it?? PrincetonUniversity

10. 06/30/08 – IV Sweep #4 – T(FC) = 80°C Rint (before CR) = 0.455 Ω :: Rint (after CH) = 0.750 Ω H2 = 410 mL/min :: N2 = 100 mL/min Voltage vs. Time during 1.2A Current Hold step PrincetonUniversity

11. 06/30/08 – IV Sweep #5 – T(FC) = 80°C • Current ramp to 1.9A, followed by current hold: Rint (before CR) = 0.715 Ω :: Rint (after CH) = 1.32 Ω H2 = 410 mL/min :: N2 = 100 mL/min Mass Transfer Limitation Region: Where is it?? PrincetonUniversity

12. 06/30/08 – IV Sweep #5 – T(FC) = 80°C Rint (before CR) = 0.715 Ω :: Rint (after CH) = 1.32 Ω H2 = 410 mL/min :: N2 = 100 mL/min Voltage vs. Time during 1.9A short Current Hold step PrincetonUniversity

13. 07/01/08 – IV Sweep #1 – T(FC) = 78.6°C • Current ramp to 0.6A, followed by current hold: Rint (before CR) = 3.67 Ω :: Rint (after CH) = 0.858 Ω H2 = 410 mL/min :: N2 = 100 mL/min PrincetonUniversity

14. 07/01/08 – IV Sweep #5 – T(FC) = 78.6°C Rint (before CR) = 3.67 Ω :: Rint (after CH) = 0.858 Ω H2 = 410 mL/min :: N2 = 100 mL/min Voltage vs. Time during Current Hold step PrincetonUniversity

15. 07/01/08 – RH[C] Temp vs. Time – T(FC) = 78.6°C PrincetonUniversity

16. 07/01/08 – %RH[C] vs. Time – T(FC) = 78.6°C PrincetonUniversity

17. 07/01/08 – %RH[C] vs. Time – T(FC) = 78.6°C PrincetonUniversity