Citation: DOU Zhe, FENG Ming, XU Xiu-feng. Catalytic decomposition of N₂O over Au/Co₃O₄ and Au/ZnCo₂O₄ catalysts[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(10): 1234-1240. shu

Catalytic decomposition of N₂O over Au/Co₃O₄ and Au/ZnCo₂O₄ catalysts

1.
School of Chemistry and Chemical Engineering, Yantai University;Shandong Applied Research Center of Gold Nanotechnology, Yantai 264005, China

Corresponding author: XU Xiu-feng,
Received Date: 8 April 2013
Available Online: 12 June 2013

Au/Co₃O₄ catalysts with different gold loadings were prepared by the deposition-precipitation method using HAuCl₄ solution through adjustment of the pH value to 7, 9 or 11. Their catalytic properties for N₂O decomposition in the presence of oxygen were investigated. 0.29%Au/Co₃O₄ catalyst prepared at the pH value of 9 exhibited higher catalytic activity than 0.31%Au/ZnCo₂O₄ prepared under optimal conditions although ZnCo₂O₄ was more active than Co₃O₄. AES, BET, XRD, SEM, XPS and H₂-TPR characterization results indicated a synergistic effect existed between gold and cobalt species in Au/Co₃O₄, which is, however, absent in the Au/ZnCo₂O₄. Despite that N₂O was completely decomposed at 500 ℃ in oxygen atmosphere for both the samples, the N₂O conversion was decreased to 92% and 63% after the reaction was carried out for 10 h in the presence of both oxygen and steam over the 0.29%Au/Co₃O₄ and the 0.31%Au/ZnCo₂O₄, respectively.
- N₂O decomposition,
- Co₃O₄,
- ZnCo₂O₄,
- gold catalyst
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沈阳化工大学材料科学与工程学院沈阳 110142

Catalytic decomposition of N2O over Au/Co3O4 and Au/ZnCo2O4 catalysts

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Catalytic decomposition of N₂O over Au/Co₃O₄ and Au/ZnCo₂O₄ catalysts