Adsorption of hydrogen by palladium

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SUMMARY

The discussion centers on the adsorption of hydrogen gas in palladium, highlighting that palladium can absorb hydrogen up to 900 times its volume. A strong pump is necessary to achieve this volume, or alternatively, the hydrogen must be cooled prior to absorption. The process generates heat, which is attributed to the formation of Pd-H bonds and changes in entropy, as indicated by the relationship T*deltaS. The reduction in volume and entropy during hydrogen absorption is also emphasized.

PREREQUISITES
  • Understanding of hydrogen adsorption mechanisms
  • Knowledge of palladium metal properties
  • Familiarity with thermodynamic principles, particularly entropy
  • Basic concepts of gas behavior under pressure
NEXT STEPS
  • Research the thermodynamics of gas adsorption in metals
  • Explore the properties and applications of palladium in hydrogen storage
  • Learn about the formation and characteristics of Pd-H bonds
  • Investigate advanced pumping techniques for gas compression
USEFUL FOR

This discussion is beneficial for materials scientists, chemists, and engineers involved in hydrogen storage technologies and those studying the properties of palladium in gas adsorption applications.

verdigris
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How does hydrogen gas get into a piece of palladium metal such that the amount of hydrogen is 900 times the volume of palladium?A strong pump would be required to put 900 times the volume of a gas cylinder into the cylinder or the hydrogen would have to have its temperature lowered first.
Heat is evolved as hydrogen goes into the palladium - is this the hydrogen being cooled or pd-h bonds forming?
 
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I do not if there's any Pd-H bond formed when H2 comes into palladium, but part of the heat is due to the entropy following the term : T*deltaS.
Volume is reduced and so is entropy.
 

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