Nanostructured Electrolytic Composites Based on Cobalt Alloys …
751
Fig. 14 The dependence of i pa /i pc on the potential scanning rate for the Co–Mo–Zr-coated electrode
for the cycles 1 (1) and 6 (2)
Table 3 The influence of the number of potential scanning cycles on the methanol oxidation current
peak
Current peak (mA)
# of the potential scanning cycle
1
2
3
4
5
6
7
8
i pa
46.5
30.0
26.2
24.0
21.0
19.4
17.0
16.0
i pc
5.2
5.3
5.6
5.9
6.2
6.5
6.8
7.1
Fig. 15 Cyclic voltamograms of electrodes coated with Fe–Co–Mo deposited by DC (specimen 8)
(a) and PC (specimen 9) (b) in methanol containing an alkaline solution
direct polarization, and the potentials of the peaks are shifted toward more positive
values. The growth of current peaks in each subsequent cycle is due to the extension of the electrode material surface and the enrichment of the electrode surface by
catalytically active centers associated with intermediate oxides.
751
Fig. 14 The dependence of i pa /i pc on the potential scanning rate for the Co–Mo–Zr-coated electrode
for the cycles 1 (1) and 6 (2)
Table 3 The influence of the number of potential scanning cycles on the methanol oxidation current
peak
Current peak (mA)
# of the potential scanning cycle
1
2
3
4
5
6
7
8
i pa
46.5
30.0
26.2
24.0
21.0
19.4
17.0
16.0
i pc
5.2
5.3
5.6
5.9
6.2
6.5
6.8
7.1
Fig. 15 Cyclic voltamograms of electrodes coated with Fe–Co–Mo deposited by DC (specimen 8)
(a) and PC (specimen 9) (b) in methanol containing an alkaline solution
direct polarization, and the potentials of the peaks are shifted toward more positive
values. The growth of current peaks in each subsequent cycle is due to the extension of the electrode material surface and the enrichment of the electrode surface by
catalytically active centers associated with intermediate oxides.