Table 2. Electrochemical parameters.

Ink	j 1.48 V [A gIr–1]	j 1.51 V [A gIr–1]	b [mV dec–1]	α [—]	j 0 × 10–6 [A gIr–1]	j cap × 10–1 [A gIr–1]
Ir-black UC	2.2	10.4	42.9	1.38	3.16	3.55
Ir-nano 99.8	4.4	22.3	41.2	1.44	3.79	6.99
Ir-nano 99.8-P	24.2	99.6	39.7	1.49	13.50	26.74
Ir-nano 99.5	3.9	19.8	41.7	1.42	3.93	7.67
Ir-nano 99.5\CTAB	1.8	8.9	42.7	1.38	2.57	2.99
Ir-nano 91.5	1.1	5.1	46.4	1.28	4.48	2.12
Ir-nano H2O	0.1	0.3	63.8	0.93	9.92	—