Is there any mentioning of Ahmad Ibn Hambal in Shi'i Imami traditions? He was a contemporary of Imam Jawad, Imam Al Hadi and Imam Al Askari, they must have said something about him because later Abbasid caliphs had designated his "Hambali Fiqh" as the official one.

Daylami has reported that Ahmad Ibn Hambal studied under Imam al-Kadhem (a). He has narrated a few hadiths from Imam al-Kadhem (a).
But I am not aware of any hadiths from the Imams that mention Ahmad Ibn Hambal.