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 .
 Ir, Sn, O ( 2 )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Ir, Sn, O ( 2 )