12632
First - principle calculations combined with thermodynamic considerations suggest that this phenomenon is due to competitive alloying of different group - III elements with Au catalysts , and variations in elemental concentrations of group - III materials in the catalyst under different precursor flow rates .
 Chemical: Au
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Au