Electrochemical and Morphological Investigations of Ga Addition to Pt Electrocatalyst Supported on Carbon

Table 5

Fitted circuit [R1(R2[Q1W1])] parameters of the PtGa/C .

Circuit; elements/unit	Pt100	Pt91Ga9/C	Pt83Ga17/C	Pt75Ga25/C	Pt69Ga31/C	Pt54Ga46/C
In presence of ethanol
/Ω	7.18	3.83	3.64	6.44	3.92	11.95
/Ω	1194	1630	1025	1030	1212	1570
/mF	12.99	17.07	13.1	8.42	4.64	1.94
n	0.95	0.96	0.95	0.94	0.92	0.88
/Ω	5.44	2.65	1.89	4.23	1.85	1.32
In absence of ethanol
/Ω	41.46	2.68	2.9	3.9	3.9	5.9
/Ω	5641	2387	5343	3455	3106	4334
/mF	16.4	8.8	18,1	3.8	6.30	4.32
	0.97	0.99	0.96	0.90	0.92	0.909
/Ω	1.85	15.8	1.40	3.2	1.3	2.2

-square observed for all simulation ranged from 10⁻⁴ to 10⁻⁵ and the error for the data values simulation was obtained between 0.08 and 15%. is constant phase element; is ohmic resistance; is charge transfer resistance; is Warburg impedance.