Cadmium sulfide hydrogen generation

Sobczynski A, Bard AJ, Campion A, Fox MA, MaUouk T, Webber SE, White JM (1987) Photoassisted hydrogen generation platinum and cadmium sulfide supported on separate particles. J Phys Chem 91 3316-3320... 

Generation of hydrogen from H2S using cadmium sulfide with waste products as sacrificial agents to avoid photocorrosion of the semiconductor is expected to grow as a niche application. 

Rafaeloff, R., Tricot, Y.-M., Nome, F., and Fendler, J.H., Colloidal catalyst coated semiconductors in surfactant vesicles In situ generation of rhodium-coated cadmium sulfide particles in diocta-decyldimethylammonium halide surfactant vesicles and their utilization for photosensitized charge separation and hydrogen generation, J. Phys. Chem., 89, 533,1985. 

Cadmium yellow consists of pure cadmium sulfide (golden yellow color) or mixed crystals of zinc and cadmium sulfide [8048-07-5], (Cd, Zn)S, in which up to one-third of the cadmium can be replaced by zinc. The density of this pigment is 4.5-4.8 g/cm3 and its refractive index is 2.4-2.5. The prevalent parcticle size is approx. 0.2 pm with cubic to spheroidal habits. Cadmium yellow is practically insoluble in water and alkali, and of low solubility in dilate mineral acid. It dissolves in concentrated mineral acid with generation of hydrogen sulfide. 

Visible Light Induced Hydrogen Production from In Situ Generated Colloidal Rhodium-Coated Cadmium Sulfide in Surfactant Vesicles. The first of a series of studies (see also Refs. 505-507) exploring the use of vesicles and reverse micelles for photo-induced charge separation and HER. 504... 

Note 2 More efficient methods than electrolysis for obtaining hydrogen from water are under investigation. One of these is thermochemical decomposition. Another is photochemical decomposition by solar radiation, either directly or via a solar power generator. Photolytic decomposition of water with platinum catalyst has been achieved. Hydrogen can also be obtained by photolytic decomposition of hydrogen sulfide with cadmium sulfide catalyst. 

Cadmium sulfide particles loaded with catalysts such as Pt, Ru02, and RuS4 as aqueous dispersions have been used for the photoinduced generation of hydrogen from The dispersions are prepared by the addition of the loaded... 

Figure 0 Generation of CdS quantum dots in the core of spherical micelles. The micellization of the triblock copolymers is accomplished by the addition of cadmium ions, which act as cross-linkerforthe charged center blocks of the polymer. Subsequent reaction of hydrogen sulfide leads to the formation of CdS nanoparticles stabilized by a mixed brush layer. Reprinted with permission from Guo, Y. Moffit, M.G. Macromolecules 2007, 40,5868. Copyright 2007 American Chemistry Society.

Treatment of this block copolymer with hydrogen sulfide resulted in the presence of small partieles of lead sulfide in an essentially polynorbornene matrix. Semiconductors based on metal sulfides (PbS, CdS) have been generated by this method. Similar block copolymers have been prepared from norbornenes that contain tin, zinc, cadmium, palladium, and gold. 

---