Table 4. Activation Energy Values Obtained by the Isoconversional Method.

reduction stage	Α	slope	E/(kJ·mol–1)	R2
first stage	0.05	–21,088	175.32	0.9795
	0.10	–27,595	229.42	0.9979
	average	–24,341	202.37
second stage	0.15	–20,863	173.45	0.9988
	0.20	–28,646	238.16
	0.30	–34,874	289.94
	0.40	–29,892	248.52
	0.55	–35,808	297.71
	average	–30,016	249.55
all stage	average		225.96