Chemistry Reference
In-Depth Information
Ta b le 9.9
Electrolyte-resistance (
W
) data obtained for different electrodes at an
electrolyte concentration of 1
¥
10
-
4
mol l
-
1
Time (h)
Palladium (
W
)
oven (
W
)
Knitted (
W
)
Non-woven (
W
)
0
303 000
308 000
299 000
303 000
1
301 000
301 000
298 000
301 000
2
304 000
295 000
294 000
299 000
4
304 000
288 000
291 000
296 000
8
301 000
280 000
286 000
291 000
16
299 000
271 000
283 000
286 000
24
304 000
264 000
281 000
284 000
30
302 000
259 000
281 000
283 000
36
301 000
257 000
279 000
282 000
48
304 000
252 000
278 000
281 000
60
303 000
250 000
277 000
283 000
72
300 000
248 000
276 000
281 000
96
301 000
246 000
275 000
282 000
120
303 000
246 000
275 000
282 000
Table 9.10
Electrolyte-resistance (
W
) data obtained for different electrodes at an
electrolyte concentration of 1
¥
10
-
3
mol l
-
1
Time (h)
Palladium (
W
)
oven (
W
)
Knitted (
W
)
Non-woven (
W
)
0
29 020
29 400
28 600
29 050
1
29 020
28 420
28 200
28 610
2
29 010
28 010
28 050
28 200
4
29 040
27 200
27 900
27 820
8
29 000
26 490
27 420
27 560
16
28 980
25 600
27 000
27 200
24
29 040
24 920
26 900
27 050
30
29 040
24 480
26 790
27 010
36
29 020
24 190
26 750
27 000
48
29 000
23 950
26 700
27 000
60
29 030
23 710
26 610
26 980
72
29 040
23 600
26 550
27 010
96
29 010
23 520
26 510
27 000
120
29 000
23 520
26 500
27 020
slowly, it can most likely be explained by air bubbles trapped in the textile
structure. These bubbles can escape only by a slow dissolution process in
the surrounding electrolyte solution. Another indication that supports this
hypothesis is the fact that, after some time, the system obtains an equilib-
rium condition, probably because all trapped air is removed, giving rise to
