13238
We developed an advanced surfactant - assistant method for the Ir ( x ) Sn ( 1 - x ) O ( 2 ) ( 0 < x <= 1 ) nanoparticle ( NP ) preparation , and examined the OER performances by a series of half - cell and full - cell tests .
 Chemical: Ir; Chemical: Sn; Chemical: O ( 2 )
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: Ir, Sn, O ( 2 ) 
Answer:
 Chemical: Ir; Chemical: Sn; Chemical: O ( 2 )