Deposition of water-insoluble cobalt phthalocyanine CoPc onto the particles of mixed suspensions of CdS and Cu_xS can increase the rate of photoinduced evolution of H₂ from Na₂S and Na₂SO₃ solutions. At [Na₂S]=5×10⁻² M, the rate of photocatalytic reaction is almost doubled upon deposition of 6.4×10⁻¹⁰ mol CoPc onto 4×10⁻⁵ mol of CdS and of 2.9×10⁻⁸ mol of CoPc onto 10⁻⁵ mol of Cu_xS. At [Na₂S]=10⁻¹ M, which is close to the optimal concentration of Na₂S, the deposition of CoPc can provide only a 30% increase of the reaction rate.