What is released at the anode during the electrolysis of Aluminium Oxide?

During the electrolysis of Aluminium Oxide (Al2O3), oxygen gas is released at the anode. The process involves breaking down Aluminium Oxide into its constituent elements through the application of electrical current. The anode is where oxidation occurs, and in this specific case, oxide ions (O2-) migrate towards the anode.

At the anode, these oxide ions lose electrons and thus are oxidized to form oxygen gas (O2). The overall reaction can be simplified as follows:

[ 4O^{2-} \rightarrow 2O_2 + 8e^{-} ]

This highlights the generation of oxygen gas as a product of the electrolysis process. The other substances mentioned in the choices are not produced at the anode during this reaction. Aluminium metal is produced at the cathode, while carbon dioxide and hydrogen gas are not involved in the electrolysis of Aluminium Oxide under typical conditions.