A study on reduction behaviors of the supported platinum–iron catalysts

✍ Scribed by Jifei Jia; Jianyi Shen; Liwu Lin; Zhusheng Xu; Tao Zhang; Dongbai Liang

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 332 KB
• Volume: 138
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(98)00147-2

✦ Synopsis

The reduction behaviors of the supported platinum-iron catalysts and their comparison with supported iron catalysts were Ž . 57 Ž . studied by TPR temperature-programmed reduction -in situ Fe MBS Mossbauer spectroscopy . The results indicated that ẗhe TPR processes of all Fe-containing catalysts were different from that of bulk a-Fe O . There were interactions between 2 3 Pt, Fe and the g-Al O or SiO support for the Pt-Ferg-Al O and Pt-FerSiO catalysts. All the iron-containing catalysts 2 3 2 2 3 2 3q Ž . 0 show that Fe was highly dispersed on the support g-Al O and SiO before reduction. No Fe was found in the 2 3 2 reduction processes. The Fe 3q was reduced to Fe 2q in tetrahedral vacancy first for the reduction of the Pt-Ferg-Al O 2 3 catalyst. No Fe 2q in octahedral vacancy was found in the reduction of the Pt-FerSiO catalyst. Adding Pt to Fersupport 2 Ž . g-Al O or SiO could promote the reduction of the Fe species.