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Citation: HE Mai, FANG Ping, XIE Guan-qun, XIE Yun-long, YAN Zong-lan, LUO Meng-fei. Characterization of CuO Species in CuO/CeO₂-Al₂O₃ Catalysts by In-situ XRD, Raman Spectroscopy and TPR[J]. Acta Physico-Chimica Sinica, ;2005, 21(09): 997-1000. doi: 10.3866/PKU.WHXB20050911 shu

Characterization of CuO Species in CuO/CeO₂-Al₂O₃ Catalysts by In-situ XRD, Raman Spectroscopy and TPR

1.
Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004

Received Date: 25 January 2005
Available Online: 15 September 2005

CuO species and thermal solid-solid interaction in CuO(w,%)/ CeO₂-Al₂O₃ catalysts prepared by an impregnation method are characterized by in-situ XRD, Raman spectroscopy and H2-TPR techniques. Experiment results show that CuO presents as highly dispersed and bulk CuO on the surface of CuO(33.3%)/CeO₂-Al₂O₃ calcined at 300 ℃. At high temperatures CuO can be transferred from the surface into the internal layer of CeO₂ and the transference of CuO increases with increasing the calcination temperature. Some of CuO that exists in the internal layer of CeO₂ presents as bulk CuO, some of that interacts with the support Al₂O₃ to produce CuAl₂O₄. The calcination temperature also promotes the CuO-Al₂O₃ interaction. It shows that the existence of different CuO species can be effectively confirmed by in-situ XRD, Raman spectroscopy and H₂-TPR techniques.
- CuO/CeO₂-Al₂O₃;XRD;Raman;TPR;Transference of CuO;Solid-solid interaction
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沈阳化工大学材料科学与工程学院沈阳 110142

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Characterization of CuO Species in CuO/CeO2-Al2O3 Catalysts by In-situ XRD, Raman Spectroscopy and TPR

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通讯作者: 陈斌, bchen63@163.com

Characterization of CuO Species in CuO/CeO₂-Al₂O₃ Catalysts by In-situ XRD, Raman Spectroscopy and TPR