反应前后催化剂的XPS结果差距较小，其化学成分始终保持一致、未发生显著

The difference in XPS results of the catalyst before and after the reaction is small, and its chemical composition has always remained the same without significant changes. This fully shows that the catalyst is chemically stable, and it has only played a catalytic role without reacting with other substances under microwave conditions.

The difference in XPS results of the catalyst before and after the reaction is small, and its chemical composition remains consistent without significant change. This fully demonstrates that the catalyst has chemical stability and that it does not react with other substances under microwave conditions and only plays a catalytic role.

The results of XPS of the catalyst before and after the reaction were relatively small, and the chemical composition of the catalyst was consistent and no significant change occurred. This fully shows that the catalyst has chemical stability, it does not react with other substances under microwave conditions, but only plays a catalytic role.<br>