Introduction The Interaction of Hydrogen with Gold

The solubility of hydrogen atoms in gold is very small at 273 K the H/Au ratio was 4.4 x 10-3, and the activation energy for desorption between 250 and 380 K was 57 5kJ mol-1 the heat of absorption was1 - 9kJ mol-1. Hydrogen atoms are also able to diffuse easily through a gold layer when supplied via a palladium hydride phase.10 

The reactions with which we will be mainly concerned in this section are the hydrogen-deuterium equilibration 

Reaction Form Temp, range (K) Activation energy (kJ mol-1) Reference 

This pathway has a lower activation energy (46 kJ mol-1) than that before the deposition of the atoms (Table 9.1). 

Hydrogen-deuterium equilibration took place at around 473 K with Au/Si02, Au/MgO and A11/AI2O3 with particle sizes between 6 and 9nm rate constants and activation energies (75-116 kJ mol-1) were independent of dispersion. Rates were slower with larger particles ( 16.5 nm) and the 

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