Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 426, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.128088
Keywords
Catalytic wet air oxidation; Electronic metal-support interactions; Phenol containing waste water treatment; Pt/TiO2 catalysts
Categories
Funding
- Natural Science Foundation of China [21673187]
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In this study, a highly active Pt/TiO2 catalyst for the catalytic wet air oxidation (CWAO) of phenol was successfully prepared by supporting pre-synthesized Pt on TiO2. The research indicated that the enhancement of electron-metal support interaction (EMSI) can significantly improve the catalyst activity.
Phenol is one of the major hazardous organic compounds in industrial wastewater. In this work, a highly active Pt/TiO2 catalyst for catalytic wet air oxidation (CWAO) of phenol was obtained by supporting pre-synthesized Pt on TiO2. During the followed hydrogen reduction, strong hydrogen spillover occurred without the migration of TiO2 onto Pt. The reduced support then enhanced the electron transfer from TiO2 to Pt, increasing the percentage of partially negative Pt (Pt delta-), which has been confirmed by XPS. The strong EMSI made the obtained catalyst far more active than Pt/TiO2 prepared by impregnation method. The electron-enriched Pt/TiO2 achieved total organic carbon (TOC) conversion of 88.8% and TOF 149h(-1) at 100 degrees C and 2 MPa O-2, while conventional Pt/TiO2 gave TOC conversion of 39.5% and TOF 41 h(-1)- for CWAO of phenol. Our work indicates that the enhancement of EMSI between metal and support can be an effective approach to develop highly active catalysts for phenol treatment.
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