Here's a prayer of praise prayed aloud:
25 At that time Jesus said, “I praise You, Father, Lord of heaven and earth, that You have hidden these things from the wise and intelligent, and have revealed them to infants. 26 Yes, Father, for this way was well pleasing in Your sight. (Matthew 11:25-26)
We can only speculate on why Jesus chose to pray this one aloud. A teachable moment? In any case, I don't see anything that would make one think He was doing it to draw attention to Himself or draw praise from people.