Bismihi ta'ala
The description that has been mentioned in the holy Quran is "sadaqa Allah" (Surah Aal 'Imran, 95), and the part of ayatul-kursi "al-'Ali al-'Adheem" (Surah al-Baqarah, 255).
Among Sunni jurists, they believe it is a good "bid'ah". For Shi'a jurists, its a general dhikr that is recommended to mention, whether it be sadaqa Allah al-'Adheem, or sadaqa Allah al-'Ali al-'Adheem, in which the latter would be better, due to the Quranic description.
Unfortunately, some Sunni Muslims believe that when the Shia say "al-'Ali al-Adheem", they are referring to Imam Ali (a.s.), which is far from any truth.
And Allah knows best.