کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4756263 | 1419007 | 2018 | 5 صفحه PDF | دانلود رایگان |
- Rod-like Co3O4 was synthesized by a modified precipitation method.
- Rod-like Co3O4 shows good performance on low-concentration formaldehyde removal.
- Abundance of Co3Â + ions on rod-like Co3O4 surface exhibits high oxidation ability.
- Hydroxyl species on the surface promote the activity of formaldehyde oxidation.
In this study, rod-like Co3O4 (Co3O4-rod) nanocatalyst was prepared by a modified precipitation method, which showed an excellent performance for formaldehyde oxidation to carbon dioxide and water. The light-off temperature (10% conversion) and the temperature for complete conversion of formaldehyde was at 60 °C and 120 °C, respectively. XPS and CO2-TPD analyses indicated that Co3O4-rod had abundant Co3 + and OH (hydroxyl) species on the surface compared with other morphologies of Co3O4 investigated (e.g. Co3O4-sheet and Co3O4-cube). It was proposed that Co3 + ions should be considered as active sites of good oxidation ability for formaldehyde catalytic oxidation.
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Journal: Catalysis Communications - Volume 103, 5 January 2018, Pages 10-14