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Effect of the surface area of cobaltic oxide on carbon monoxide oxidation

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Various surface area (SBET) of cobaltic oxide (Co3O4) are prepared by different methods, i.e., precipitation–oxidation, impregnation and hydrothermal. The effect of SBET of Co3O4 on the catalytic property toward CO oxidation is investigated. The results indicate that the optimum SBET of Co3O4 could increase the catalytic activity. Characterization of the cobaltic oxide using X-ray diffraction (XRD), N2-adsorption at −196 °C, infrared (IR) and temperature-programmed reduction (TPR) reveals that the increase of SBET on Co3O4 can weaken the bond strength of Co–O and promote more lattice oxygen desorption from Co3O4 to cause the reduction become easy. We conclude that the SBET effect, caused by various prepared methods and refined conditions, are responsible for the activity enhancement of Co3O4. The T50 (the conversion of CO reached 50%) is decreased significantly when the SBET is increased, i.e., PO-R230 > PO-C400 > I-C550 > H-150 ~D-Strem.

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Authors and Affiliations

  1. Department of Applied Chemistry, Chung Cheng Institute of Technology, National Defense University, Tahsi, Taoyuan, 33509, Taiwan, Republic of China

    Chen-Bin Wang, Chih-Wei Tang & Shiue-Jiun Gau

  2. Institute of Chemistry, Academia Sinica, Taipei, 11529, Taiwan, Republic of China

    Chih-Wei Tang, Shiue-Jiun Gau & Shu-Hua Chien

  3. Department of Chemistry, National Taiwan University, Taipei, 10764, Taiwan, Republic of China

    Shu-Hua Chien

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  1. Chen-Bin Wang
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  2. Chih-Wei Tang
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  3. Shiue-Jiun Gau
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  4. Shu-Hua Chien
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Correspondence to Chen-Bin Wang or Shu-Hua Chien.

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Wang, CB., Tang, CW., Gau, SJ. et al. Effect of the surface area of cobaltic oxide on carbon monoxide oxidation. Catal Lett 101, 59–63 (2005). https://doi.org/10.1007/s10562-004-3750-0

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  • DOI: https://doi.org/10.1007/s10562-004-3750-0

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