16846
While these processes are dramatically enhanced by an external DC or AC field and electron - donating electrodes , they can be completely prevented by eliminating nanoporosity , depositing a barrier layer , or using an oxidation - resistant electrode .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None