Kinetics of Hydrogen Evolution on Copper Electrode Involving Organic Acids as Proton Donors

Table 2

Distribution of different species in the solutions containing 0.02 M of gluconic acid and 0.5 M of Na₂SO₄ as a supporting electrolyte.

pH	H3O^+ (mM)	L^− (mM)	LH (mM)	HSO^−4 (mM)	𝑐H (mM)
2.0	14.3	0.28	19.7	150	184
2.5	4.51	0.85	19.1	59.7	83.3
3.0	1.43	2.5	17.6	20.5	39.5
4.0	0.14	11.6	8.3	2.16	10.6