Na2O2 + 2 Al + 6 H2O → 2 Na[Al(OH)4] + 2 H2
This is a complexation reaction: Na[Al(OH)4] is the formed complex.
This is an oxidation-reduction (redox) reaction:
4 HI + 4 e- → 4 H0 (reduction)
2 Al0 - 6 e- → 2 AlIII (oxidation)
2 O-I + 2 e- → 2 O-II (reduction)
H2O is an oxidizing agent, Al is a reducing agent, Na2O2 is an oxidizing agent.