23032
This intrinsically multifunctional Pt NP @ PPy NF with well - controlled Pt facets thus could serve as an advanced electrocatalyst for biosensing and fuel cell applications , surpassing the performance of many existing materials .
 Chemical: Pt; Chemical: PPy; Chemical: Pt
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: Pt, PPy, Pt 
Answer:
 Chemical: Pt; Chemical: PPy; Chemical: Pt