However, a decreasing trend in ∠O 2 ‐O FLP ‐Al FLP is observed in Type II mode with increasing temperature, indicating the possible temperature‐promoted conversion of chemisorbed acetone from Type I to Type II state of increasing population.
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The sentences
In Type I mode, ∠O 1 ‐O BAS ‐ Al BAS exhibits a clear trend of increase angle from 298 K to 573 K due to thermal motion.