Table 1.

The rate constant values for DA at different sweep rates.

υ (mV/s)	ΔEp (mV)		k°(s−1)
	RGO-Y2O3	RGO-Y2O3;Cr3+	RGO-Y2O3	RGO- Y2O3;Cr3+
50	74	53	0.68083	0.86559
100	74	53	1.36166	1.73119
150	76	54	1.99631	2.56726
200	78	60	2.60157	3.19606
250	82	63	3.10659	3.86037
300	86	65	3.56126	4.52771
350	90	71	3.96907	4.93211
400	97	71	4.18718	5.6367
450	102	74	4.44884	6.12746
500	108	75	4.61542	6.73089