Ti 3 is to be generated in 0 10 M HClO 4 solution for coulometric reduction of azobenzene At the counter electrode, water is oxidized, and O 2 is liberated at a pressure of 0 20 bar Both electrodes are made of smooth Pt, and each has a total surface area of 1 00 cm 2 The rate of reduction of the azobenzene is 25 9 nmol s, and the resistance of the solution between the generator electrodes is 52 4 (a) Calculate the current density (A m 2 ) at the electrode surface Use Table 16 1 to estimate the overpotential for O 2 liberation (b)Calculate the cathode potential (versus S H E ) assuming that TiO 2 surface TiO 2 bulk 0 050 M and Ti 3 surface 0 10 M (c) Calculate the anode potential (versus S H E ) (d) What should the applied voltage be TiO 2H e Ti H,0 E 0 100 V 4T1 C,H N NC,H 4H,0 2C,H NH, 4TIO 4H Azobenzene Aniline

Question: Ti 3+ is to be generated in 0.10 M HClO 4 solution for coulometric reduction of azobenzene. At the counter electrode, water is oxidized, and

Ti³⁺ is to be generated in 0.10 M HClO₄ solution for coulometric reduction of azobenzene.

TiO?+ + 2H+ + e = Ti³+ + H,0 E° = 0.100 V 4T1³* + C,H;N=NC,H; + 4H,0 → 2C,H;NH, + 4TIO²* + 4H* Azobenzene Aniline

At the counter electrode, water is oxidized, and O₂ is liberated at a pressure of 0.20 bar. Both electrodes are made of smooth Pt, and each has a total surface area of 1.00 cm². The rate of reduction of the azobenzene is 25.9 nmol/s, and the resistance of the solution between the generator electrodes is 52.4 Ω.

(a) Calculate the current density (A/m²) at the electrode surface. Use Table 16-1 to estimate the overpotential for O² liberation.

(b)Calculate the cathode potential (versus S.H.E.) assuming that [TiO²⁺] surface [TiO²⁺]bulk 0.050 M and [Ti³⁺]surface 0.10 M.

(d) What should the applied voltage be?

TiO?+ + 2H+ + e = Ti+ + H,0 E = 0.100 V 4T1* + C,H;N=NC,H; + 4H,0 2C,H;NH, + 4TIO* + 4H* Azobenzene Aniline

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