Au/Fe2O3 Water-Gas Shift Catalyst Prepared by Modified Deposition-Precipitation Method

✍ Scribed by Jinwei LI; Yingying ZHAN; Fengli ZHANG; Xingyi LIN; Qi ZHENG

• Publisher: Elsevier Science
• Year: 2008
• Weight: 834 KB
• Volume: 29
• Category: Article
• ISSN: 1872-2067
• DOI: 10.1016/s1872-2067(08)60031-5

✦ Synopsis

The Au/Fe 2 O 3 catalyst was prepared by co-precipitation, deposition-precipitation, and modified deposition-precipitation methods and was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and transmission electron microscopy. The catalyst activity for the water-gas shift (WGS) reaction was discussed. Under strictly controlled conditions, the Au/Fe 2 O 3 catalyst prepared by modified deposition-precipitation displayed higher activity for the WGS reaction than that prepared by co-precipitation and deposition-precipitation. In the former case, the CO conversion of 82.3% was obtained with a feed gas of 10% CO/N 2 at 150 °C. Wherein, gold particles of 3-5 nm were highly dispersed on the surface of the Fe 2 O 3 support that existed in an amorphous and crystalline state. A relatively strong interaction between gold particles and the support occurred, which was beneficial for the WGS reaction.