Sodium　titanate　was　hydrothermally　synthesized　on　the　surface　of　titanium　particles　in　supercritical　water.　Sodium　titanate　showed　catalytic　activity　on　supercritical　water　oxidation　(SCWO)　of　acetic　acid　and　promoted　oxidation　rate　greatly　comparing　to　uncatalyzed　oxidation.　Global　rate　law　based　on　power-law　model　and　Langmuir-Hinshelwood　model　could　describe　experimental　results　well.　In　addition,　Mars-Van　Krevelen　model　expresses　catalytic　process　well.　This　suggested　that　redox　reaction　over　sodium　titanate　might　be　a　dominant　oxidation　mechanism,　at　least,　above　450　degrees　C.　Deactivated　sodium　titanate　was　easily　re-synthesized　and　it　recovered　catalytic　activity.　Sodium　titanate　showed　a　great　potential　of　a　long-term　available　catalyst　in　SCWO　processes　through　its　cyclic　re-activation.　(C)　2011　Elsevier　B.V.　All　rights　reserved.