Sol-gel Synthesis, Photo- and Electrocatalytic Properties of Mesoporous TiO2 Modified with Transition Metal Ions

Table 1 Photoelectrochemical characterization of M/TiO₂ films (M–Co, Ni, Mn, Cu)

Sample	E_fb (eV) vs NHE	Quantum yield of photocurrent η (a.u.)	E_g (eV)	E_1/2 (V)
TiO₂	−0.42	1	3.09	−0.58
1% Ni/TiO₂	−0.42	1.66	3.07	−0.46
5% Ni/TiO₂	−0.45	1.14	2.95	−0.76
1% Co/TiO₂	−0.36	1.07	3.07	−0.52
5% Co/TiO₂	−0.80	0.28	2.97	−0.67
1% Mn/TiO₂	−0.48	2.80	3.08	−0.52
5% Mn/TiO₂	−0.40	0.93	2.88	−0.6
1% Cu/TiO₂	−0.30	1.03	3.08	−0.55
5% Cu/TiO₂	−0.15	1.14	3.07	−0.78
30% Cu/TiO₂	−0.10	0.94	2.99