Hydrogen Storage and Release Properties of a Cu-Added Fe/YSZ Redox System

Table 2

The hydrogen evolution rate for the samples during isothermal redox cycles.

Sample	Hydrogen evolution rate^a (mmol min^−1 g^−1-sample)
	1st	2nd	3rd	4th	5th	Avg.
Fe/YSZ-1	1.07	0.95	0.92	0.87	0.97	0.96
Fe/YSZ-2	0.19	0.14	0.1	0.12	0.10	0.13
Fe/YSZ-3	0.70	0.63	0.71	0.79	0.75	0.72
Fe/YSZ-4	0.58	0.56	0.44	0.42	0.44	0.49

aQuantity of hydrogen evolved divided by the time required for complete oxidation.