Generator of Hydrogen

Quahtative insight can, however, be obtained by focusing on the reactions with water, the extent and vigor of which can vary widely. In general, however, hydrides react exothermically with water, resulting in the generation of hydrogen. 

Stabilizers. Heat stabilizers (qv) are included in PVC compounds to counteract the internal generation of hydrogen chloride as well as the external degradative effect of heat. Due to environmental considerations, there is a trend toward decreasing and even avoiding the use of stabilizers based on heavy metals, eg, lead. 

The rate at which the corrosion of the 2iac proceeds depends on the rates of the two half reactions (eqs. 8 and 12). Equation 8, a necessary part of the desired battery reaction, fortunately represents a reaction that proceeds rather rapidly, whereas the reaction represented by equation 12 is slow. le, the generation of hydrogen on pure 2iac is a sluggish reaction and thus limits the overall corrosion reaction rate. 

A simple electrochemical flow-through cell with powder carbon as cathodic material was used and optimized. The influence of the generation current, concentration of the catholyte, carrier stream, flow rate of the sample and interferences by other metals on the generation of hydrogen arsenide were studied. This system requires only a small sample volume and is very easily automatized. The electrochemical HG technique combined with AAS is a well-established method for achieving the required high sensitivity and low detection limits. 

Caution The generation of hydrogen in this preparation necessitates the use of a hood. 

A 500-ml, three-necked round-bottom flask is fitted with a dropping funnel and a reflux condenser. In the flask is placed 150 ml of absolute ethanol. Sodium metal (4.6 g, 0.2 g-atom) is cut into small pieces and introduced into the flask so as to maintain a rapid but controlled generation of hydrogen. When the sodium has completely... 

At this point (1943) we were visited by representatives of the Signal Corps. They had learned through our reports that we had a new chemical that might be used for the field generation of hydrogen. They felt that their present method, based on the reaction of alkali with ferrosilicon, was cumbersome and they were seeking a more convenient hydrogen source. 

Bockris JO M, Uosald K (1977) The rate of the photoelectrochemical generation of hydrogen at p-type semiconductors. J Electrochem Soc 124 1348-1355... 

LONG L H, CLEMENT M V and HALLiwELL B (2000) Artifacts in cell-culture rapid generation of hydrogen peroxide on addition of (-)-epigaUocatechin, (-)-epigallocatechin gallate, (-i-)-catechin, and quercetin , Biochem Biophys Res Commun, 273 (1), 50-53. 

Following the first observations by Darwent and Porter numerous studies have been carried out into the generation of hydrogen by illuminating CdS suspensions or CdS sols with visible light A sacrificial electron donor such as SH ,... 

Marker, H.S., Weiss, C., Silides, D.J., and Cohen, G. (1981). Coupling of dopamine oxidation (monoamine oxidase activity) to glutathione oxidation via the generation of hydrogen peroxide in rat brain homogenates. J. Neurochem. 36, 589-593. 

Puacz et al. (1995) developed a catalytic method, based on the iodine-azide reaction, for the determination of hydrogen sulfide in human whole blood. The method involves the generation of hydrogen sulfide in an evolution-absorption apparatus. In addition, the method allows for the determination of sulfide in blood without interference from other sulfur compounds in blood. A detection limit of 4 g/dm3 and a percent recovery of 98-102% were achieved. Although the accuracy and precision of the catalytic method are comparable to those of the ion-selective electrode method, the catalytic method is simpler, faster, and would be advantageous in serial analysis. 

Add sodium borohydride (Aldrich) to the peptide solution to obtain a final concentration of 0.1M. Generation of hydrogen bubbles will occur as the borohydride is dissolved. 

S. Tada-Oikawa, Y. Hiraku, M. Kawanishi, and S. Kawanishi, Mechanism for generation of hydrogen peroxide and change of mitochondrial membrane potential during rotenone-induced apoptosis. Life Sci. 73, 3277-3288 (2003). 

Fukase, S. and Suzuka, T., Residual oil cracking with generation of hydrogen Deactivation of iron oxide catalyst in the steam-iron reaction, Appl. Catal. A General, 100,1,1993. 

Brown, L.C. et al., High efficiency generation of hydrogen fuels using nuclear power, General Atomics report GA-A24285, 2003. 

Zhang, R. Brown, R. C. Suby, A., Thermochemical generation of hydrogen from switchgrass. Energy and Fuels 2004,18(1), 251-256. 

---