作者会怎么回答这个审稿人的问题。？

补个实验看哈延长时间会怎么样，那就补嘛！

加实验时间，分析性能

9. The long-term hydrogen evolution experiments are limited to 5 hours in one cycle. What is
happening with the performance beyond the said time (around 15-20 hours)? Are these films
stable and active under reaction conditions at longer duration?

就是要你补实验

就是问你稳定性，你就做个稳定性实验，五小时一个循环，做十组甚至更多