Enhancing the catalytic performance of cobalt oxide by doping on ceria in the high temperature water-gas shift reaction
- Enhancing the catalytic performance of cobalt oxide by doping on ceria in the high temperature water-gas shift reaction
- Ajay Jha; Dae-Woon Jeong; Yeol-Lim Lee; 나인욱; Hyun-Seog Roh
- Issue Date
- RSC advances
- VOL 5, 103023-103029
- The high temperature water-gas shift (HT-WGS) reaction was performed using a Co-CeO2 catalyst, prepared through a co-precipitation method. The catalyst showed stable activity performance at 400 degrees C with 90% CO conversion without any side reactions (methanation) at a very high GHSV of 143 000 h(-1), which is the highest value reported for the HT-WGS reaction. This remarkable performance is attributed to the superior reducible nature of ceria and the preferential exposure of (220) and (112) facets of CeO2 and Co3O4, respectively. The time-on-stream study substantiates that ceria stabilizes the surface area of the Co-CeO2 catalyst during the WGS reaction compared to the bulk Co3O4.
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