Table 1.

Performance comparison of Pd based catalysts on different supporting matrices.

Sl.No	Name of the catalyst	Onset potential (V vs. SHE)	Tafel slop value (mV/dec)	Medium	Current density; RDE data (mA/cm2)	No. of electrons (n)	Reference
1	Pd/Activated Carbon	0.58	—	0.5 M HClO4	1.1*	—	33
2	Pd/LaFeO3	0.66	92	0.1 M KOH	3.92	2.21	34
3	Pd/WC-700-m	0.69	—	0.1 M NaOH	2	3.0	35
4	Pt/C (commercial)	1.04
	PdNi dealloyed	1.04	—	0.1 M HClO4	—	—	36
	Pd dealloyed	0.90
5	NM (Nanotubular Mesoporous) -Pd	0.90	67	0.1 M HclO4	6.0	4	37
	Pd/C	0.95	88		5.0
6	Pd/PEDOT	0.51	105	0.5 M H2SO4	1.8	2.8	This work
7	Pd/rGO	0.86	121		—	2.1	3
	Pd/PEDOT/rGO	0.98	152	0.1 M KOH	0.82	3.7

*Taken from CV data at 0.1 V/s.