id	keyword
brj-23421	carbon
brj-23421	et al
brj-23421	catalyst
brj-23421	doi
brj-23421	decomposition
brj-23421	wang
brj-23421	nitrogen
brj-23421	ammonia
brj-23421	surface
brj-23421	ru catalyst
brj-23421	hydrogen
brj-23421	article
brj-23421	fig
brj-23421	temperature