“…11 In detail, supported Ru-based catalysts by various metal oxides such as CeO 2 , 6,9 TiSn oxides 12 or Co 3 O 4 13 were prepared and applied for PCAH oxidation, and they all showed relatively good oxidation activity with T 90% (the temperature with 90% conversion) ranging from 260 to 300 °C, along with good anti-chlorine stability as Ru could remove chloride species through a Deacon reaction. 11,12,14 However, the current work generally used high Ru loading (mostly 1 wt%), 11,12 and reducing the Ru loading, for instance to 0.3 wt%, usually resulted in decreased catalytic activity with T 90% > 300 °C. 14 Therefore, we expect to develop a catalyst which possesses not only low Ru loading ( e.g.…”