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Surface Chemistry

Adsorption: Phenomenon of accumulation of molecules at the surface of a solid, which results in a higher concentration on the surface than in the bulk

 

  • Adsorbate: The substance which gets adsorbed onto a surface
  • Adsorbent: The substance on which adsorption takes place
  • Desorption: The phenomenon of removing an adsorbate from an adsorbent
  • Types of adsorption –
  1. Physical adsorption or physisorption
  2. Chemical adsorption or chemisorption

 

  •  

Physisorption

  •  

Chemisorption

1.

Arises because of van der Waals forces

1.

Arises because of chemical forces

2.

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