226
P. Narsimha et al.
Fig. 9 TEM image of
sonochemically synthesized
platinum–cobalt/C-PANI
nanoparticles
Fig. 10 Cyclic voltammetry
(CV) of
Platinum–cobalt/C-PANI
cathode in a 0.5 M H 2 SO 4
aqueous electrolyte at a scan
rate of 50 mV/s (Rajesh
Kumar et al. 2017) [with
permission from Elsevier
Chemical Engineering and
Processing: Process
Intensification 121, 2017,
50–56]
-220
-170
-120
-70
-20
30
80
0
0.2
0.4
0.6
0.8
1
I (mA)
Ewe (V) Vs NHE
the stability more than 3000 h cycles in PEM fuel cell which do not contain the
conductive support such as polyaniline (PANI) as shown in Fig. 11.
As shown in Table 3, There is an improvement in the current density with the
addition of PANI. However, there is significant reduction in the electrochemical
active area. Due to increase in the polymer chains length the particle size of the
catalyst is increased. But it is interesting to know that the addition of the conducting
polymer always leads to increase in the stability and durability of the electrode.
Figure 12 shows the PEM fuel cell performance using Platinum–cobalt/C-PANI
electrocatalysts on cathode side, Platinum/C electrocatalysts on anode side and