Electrochemical hydrogenation

Benzene hydrogenation, electrochemically promoted, 288, 452 Bipolar cells... 

Enones are selectively hydrogenated electrochemically at the conjugated alkene bond. A high degree of selectivity is achieved at an electrodeposited nickel surface... 

Figure 5.17 Reversible amount of hydrogen (electrochemical measurement at 298 K) versus the BET surface area (circles) of a few carbon nanotube samples including two measurements on high surface area graphite (HSAC) samples...

When E° values are established for a number of substances, these values are placed in a table that shows an equation for the half reaction associated with each E° value. Either the oxidation half reactions at the anodes or the reduction half reactions at the cathodes may be listed. For the zinc/hydrogen electrochemical cell described above, the half reactions would be as follows ... 

J. P. Collman, et al, Angew. Chem. Int. Ed. Engl. 1994,33, 1537 (Reduction of protons and oxidation by hydrogen, electrochemically by porphyrins reduction of N2 and catalysis). 

MCFCs and intermediate-temperature SOFCs can incorporate catalysed reform at their anodes, where the hydrogen electrochemical oxidation proceeds simultaneously, and heats the non-Faradaic and endothermic reform and shift reactions The latter process is immediately superior to a separate reformer, because it eliminates combustion reaction irreversibility. Heat produced at such an anode is given, in Appendix A, the title reversible heat , that is heat produced without the thermal degradation which occurs in the combustion reaction. 

Chen, K.Y., Sun, Z., and Tseung, A.C.C., Preparation and characterization of high-performance Pt-Ru/WOj-C anode catalysts for the oxidation of impure hydrogen, Electrochem. Solid-State Lett., 3, 10, 2000. 

There has only been one report of the substitution of a halogen in a 1,2,3-triazine by hydrogen. Electrochemical reduction of 5-bromo-4-methyl-6-phenyl-l,2,3-triazine at — 1,40 V under argon afforded 4-methyl-6-phenyl-l,2,3-triazine in 70% yield.232... 

Beguin, F, M. Friebe, K. Jurewicz, C. Vix-Guterl, J. Dentzer, and E. Frackowiak. 2006. State of hydrogen electrochemically stored using nanoporous carbons as negative electrode materials in an aqueous medium. Carbon 44 2392-2398. 

T. Hibino, A. Hashimoto, K. Asano, M. Yano, M. Suzuki, and M. Sano. An intermediate temperature solid oxide fuel cell providing high performance with hydrocarbons than with hydrogen. Electrochem. Solid State Lett. 5, (2002) A242-A244. 

Hydrogen Oxidation and Evolution on Platinum in Acids, Fig. 1 Hydrogen electrochemical reactitHis in energy conversion... 

Acoustic leak detection - active Acoustic leak detection - passive Differential flow measurement Hydrogen - electrochemical cell Hydrogen - katharometer Hydrogen - mass-spectrometer Oxygen - electrochemical cell Pressure Plugging meter... 

The corrosion rate data published in the literature are generally values averaged over a period of time. They are based on measurements of the loss of material (the weight loss method), of the ferrous ions present in the solution (photocolorimetric method), and of the pH change in the solution and on volumetric methods (collection of evolved hydrogen). Electrochemical procedures have frequently been used. Thus, corrosion current has been determined at the intersection of the initial or steady-state cathodic and anodic Tafel lines, or any of these lines with E=Another way in which information has been acquired is through Stem-Geary linear polarization and impedance analysis. 

This looks very simple, but in reality it is still very umikely to occur in a single step as shown. Equation (2.3) is the global hydrogen electrochemical oxidation mechamsm. The... 

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