Citation: Weiyi Cui, Dan Xue, Naidi Tan, Bin Zheng, Mingjun Jia, Wenxiang Zhang. Pt supported on octahedral Fe₃O₄ microcrystals as a catalyst for removal of formaldehyde under ambient conditions[J]. Chinese Journal of Catalysis, ;2018, 39(9): 1534-1542. doi: 10.1016/S1872-2067(18)63082-7 shu

Pt supported on octahedral Fe₃O₄ microcrystals as a catalyst for removal of formaldehyde under ambient conditions

Weiyi Cui ^a,b, ,
Dan Xue ^c ,
Naidi Tan ^a ,
Bin Zheng ^b ,
Mingjun Jia ^b ,
Wenxiang Zhang ^b

a Key Laboratory of Chemical Cleaner Production Technology of Jilin Province, Jilin Institute of Chemical Technology, Jilin 132022, Jilin, China;
b Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, Changchun 130021, Jilin, China;
c School of Chemistry﹠Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, Shaanxi, China

Received Date: 7 March 2018
Revised Date: 23 April 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (20973080, 21473074).

Several catalysts comprising Pt supported on octahedral Fe₃O₄ (Pt/Fe₃O₄) were prepared by a facile method involving co-precipitation followed by thermal treatment at different temperatures. A variety of characterization results revealed that this preparation process afforded highly crystalline octahedral Fe₃O₄ with a uniform distribution of Pt nanoparticles on its surface. The thermal-treatment temperature significantly influenced the redox properties of the Pt/Fe₃O₄ catalysts. All the Pt/Fe₃O₄ catalysts were found to be catalytically active and stable for the oxidation of low-concentration formaldehyde (HCHO) with oxygen. The catalyst prepared by thermal treatment at 80℃ (labelled Pt/Fe₃O₄-80) exhibited the highest catalytic activity, efficiently converting HCHO to CO₂ and H₂O under ambient temperature and moisture conditions. The excellent performance of Pt/Fe₃O₄-80 was mainly attributed to beneficial interactions between the Pt and Fe species that result in the formation a higher density of active interface sites (e.g., Pt-O-FeO_x and Pt-OH-FeO_x). The introduction of water vapor improves the catalytic activity of the Pt/Fe₃O₄ catalysts as it participates in a water-assisted dissociation process.
- Octahedral Fe₃O₄,
- Pt nanoparticles,
- Interfacial interaction,
- Catalytic oxidation,
- Formaldehyde
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Pt supported on octahedral Fe₃O₄ microcrystals as a catalyst for removal of formaldehyde under ambient conditions