Catalytic reduction of nitrate in water over Pd-Cu/TiO2 catalyst: effect of the strong metal-support interaction (SMSI) on the catalytic activity
- Catalytic reduction of nitrate in water over Pd-Cu/TiO2 catalyst: effect of the strong metal-support interaction (SMSI) on the catalytic activity
- 유천재; 김민성; 정상호; 이명석; 조일형; 이대원; 이관영
- Issue Date
- Applied catalysis B, Environmental
- VOL 142-361
- In this study, we prepared TiO2-supported Pd？Cu catalysts of different anatase/rutile phase compositions, which were used in a nitrate reduction in water. It was shown that the catalysts containing a greater anatase phase composition had higher catalytic performance. Through characterization studies using H2-temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS), the observed trend of the catalytic activity was correlated to the degree of the strong metal-support interaction (SMSI) over the catalysts. The SMSI occurred through pre-treatment of the catalysts by H2 reduction (at 200 °C), which resulted in increased partially reduced TiO2？x and electron-rich active metal (Pd and Cu) states at the catalyst of higher composition of anatase phase. The relationships between the changes in the properties and activities of the catalysts as a result of the anatase phase composition are discussed.
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