26625
The excellent electrocatalytic activity of Co - Ni LDHs may be attributed to more accessible Co active sites and rapid movement of interlayer ions within their layered structure .
 Chemical: Co; Chemical: Ni; Chemical: Co
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Co, Ni, Co 
Answer:
 Chemical: Co; Chemical: Ni; Chemical: Co