Start Science Dictionary | Overview | Topics | Groups | Categories | Bookmark this page.
 
Science dictionary - scientific encyclopedia  
Full text search :        
   A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z   #   

 

hydrogen overvoltage (hydrogen overpotential)

  
   
The excess voltage over and above that predicted using the standard electrode potential required to produce a reasonable rate of evolution of hydrogen gas during electrolysis. Electrolysis of an aqueous solution is likely to produce hydrogen gas, as the hydrogen ion is more easily reduced than the ions from most metals (See standard electrode potential). However, the need for two atoms to meet and bond to form H{TAG(tag=>sub)}2{TAG} provides a kinetic barrier to evolution of the gas.  

 

 

  
Bookmark this page:
 

 

 

  
<< former term
  
next term >>
hydrogen ion
  
hydrogen peroxide
 
   

 
Other Terms : refracting telescope | divergent evolution | even-odd nucleus

 

 
 
Home |  Add new article  |  Your List |  Tools |  Become an Editor |  Tell a Friend |  Links |  Awards |  Testimonials |  Press |  News |  About |
Copyright ©2009 Globalscience24. All rights reserved.  Terms of Use  |  Privacy Policy  |  Contact Us