Synthesis of Nanomaterials for Energy Generation …
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Fig. 11 CV Curve of Pt 83 -Co 17 /C measured against NHE in the H 2 –N 2 atmosphere at a scan rate
of 50 mV/s
Table 3 Synthesized Pt/C, platinum–cobalt/C and platinum–cobalt/C-PANI electrocatalysts using
sonochemical method and electrochemical parameters
Parameter
Electrocatalyst
Pt/C
Platinum–cobalt/C
Platinum–cobalt/C-PANI
Crystal size (nm)
10.8
9.61
15.75
EASA (m 2 /g)
7.88
8.7
5.98
OCP (V)
1
0.9
0.91
Power density (W/cm 2 )
0.32
0.27
0.36
Fig. 12 Power density Vs
current density curve of
synthesized catalyst for
cathode (Rajesh Kumar et al.
2017) [with permission from
Elsevier Chemical
Engineering and Processing:
Process Intensification 121,
2017, 50–56]
Nafion membrane in between them operated at 50 °C. It is observed from the figure,
as increasing in the current density, the power density increased and reached the
maximum value. Further, there is a drop in power density due to the mass transfer
resistances, which are increased in the ionic species. The peak power density was