RuCu/TiO2 bimetallic catalysts which were prepared via chemical reduction methods and the synergetic effect between Ru and Cu in the detoxification of ammonia-wastewater to nitrogen via catalytic wet air oxidation (CWAO) were investigated. The results showed that the addition of Cu in Ru/TiO2 can effectively improve the selectivity of N2

while the presence of Ru in Cu/TiO2can greatly enhance the catalytic activity of the catalyst. The catalyst (1Ru2Cu/TiO2) with 1% and 2% loading of Ru and Cu has the best catalytic performance among the prepared catalysts. With the reaction conditions of 0.5 MPa

150℃

[NH3]0=1000 mg·L-1

pH=12 and the application to the simulated wastewater was about 33 L·(kg cat)-1·h-1

1Ru2Cu/TiO2 achieved 87.7% ammonia conversion and 85.9% N2 selectivity. The characterization results demonstrated that the synergetic effect of Ru and Cu played a key role in the catalytic of the ammonia to nitrogen

mainly reflects in the following:the strong interaction between Ru and Cu results in good anti-leaching of 1Ru2Cu/TiO2 catalyst

leading to excellent stability for the catalyst. The electron transfer between Ru and Cu makes 1Ru2Cu/TiO2 has a moderate oxygen affinity

which has effectively enhanced the catalytic activity of the catalyst.