Nanocatalytic Liquefaction of Hydrogen

The experiments of nanocatalytic liquefaction of hydrogen were carried out using a platinum-supported carbon nanolayer. In the experiments, H PtClj, 6HjO or H PtClj was used as a Pt precursor. To prepare the Pt catalytic reaction nanolayer, the required amounts of H PtClj were mixed with 5 wt.% carbon prepared by burning naphthalene in air (Demirbas, 2008). 

All the runs were performed in a 100-ml cylindrical autoclave. The catalyzed carbon and hydrogen gas was loaded into an autoclave. The autoclave was cooled 

Hydrogen consists of a mixture of two types of molecule, ort/zo-hydrogen, in which the two proton spins are parallel, and pora-hydrogen, in which they are antiparallel. There are a number of possible methods for measuring the proportion of ortho- to /zara-molecules in a sample of hydrogen gas (Faikas, 1935 Stewart and Squires, 1955 Silvern and Pravica, 1998). 

Fignre 5.12 shows the structure of the activated hydrogen molecnle. The Pt catalyst may canse the increase of activation of the hydrogen molecnle. As mentioned before, since the activated hydrogen molecnles are more likely to be attracted each other than normal hydrogen molecules in the reaction medium, these attractions may result in liquefaction of hydrogen. 

Carbon-supported platinum (Pt) and platinum-rathenium (Pt-Ru) alloy are one of the most popular electrocatalysts in polymer electrolyte fuel cells (PEFC). Pt supported on electrically conducting carbons, preferably carbon black, is being increasingly used as an electrocatalyst in fuel cell applications (Parker et al., 2004). Carbon-supported Pt could be prepared at loadings as high as 70 wt.% without a noticeable increase of particle size. Unsupported and carbon-supported nanoparticle Pt-Ru, ,t m catalysts prepared using the surface reductive deposition 

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