期刊
MATERIALS
卷 7, 期 12, 页码 8105-8130出版社
MDPI
DOI: 10.3390/ma7128105
关键词
metal phosphate; hydroxyapatite; Pt catalyst; CO oxidation
类别
资金
- National Natural Science Foundation of China [21177028]
- Overseas Returnees Start-Up Research Fund of the Ministry of Education in China
Oxides (such as SiO2, TiO2, ZrO2, Al2O3, Fe2O3, CeO2) have often been used to prepare supported Pt catalysts for CO oxidation and other reactions, whereas metal phosphate-supported Pt catalysts for CO oxidation were rarely reported. Metal phosphates are a family of metal salts with high thermal stability and acid-base properties. Hydroxyapatite (Ca-10(PO4)(6)(OH)(2), denoted as Ca-P-O here) also has rich hydroxyls. Here we report a series of metal phosphate-supported Pt (Pt/M-P-O, M = Mg, Al, Ca, Fe, Co, Zn, La) catalysts for CO oxidation. Pt/Ca-P-O shows the highest activity. Relevant characterization was conducted using N-2 adsorption-desorption, inductively coupled plasma (ICP) atomic emission spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), CO2 temperature-programmed desorption (CO2-TPD), X-ray photoelectron spectroscopy (XPS), and H-2 temperature-programmed reduction (H-2-TPR). This work furnishes a new catalyst system for CO oxidation and other possible reactions.
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