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Preparation of nanoporous Ag@TiO2 ribbons through dealloying and their electrocatalytic properties

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Abstract

Nanoporous Ag@TiO2 composites with core-shell structure were successfully prepared through dealloying the melt-spun Al-Ag-Ti ribbons in NaOH aqueous solution. The results revealed that TiO2 shell with thickness of about 2 nm was formed in situ on the Ag ligaments. Ti3+ and Ag+ species co-existed after the dealloyed samples were calcined at 873 K, which had significant influence on the catalytic performance. The electrochemical results showed that the nanoporous Ag@TiO2 composites significantly promoted the direct oxidation of BH4 − superior to pure Ag. The enhanced catalytic activity could be attributed to the strong interfacial effects between the ligaments and TiO2 shells.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Grant No. 51371135, 11272223) and National Science and Technology Support Project of the Ministry of Science and Technology of China (Grant No. 2012BAE06B08).

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Authors and Affiliations

  1. School of Science, Key Laboratory of Shaanxi for Advanced Functional Materials and Mesoscopic Physics, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, 710049, People’s Republic of China

    Guijing Li, Xiaolong Zhang, Xiaoping Song & Zhanbo Sun

  2. Department of Engineering Mechanics, Shijiazhuang Tiedao University, Shijiazhuang, 050043, People’s Republic of China

    Guijing Li & Wenjie Feng

Authors
  1. Guijing Li
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  2. Xiaolong Zhang
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  3. Xiaoping Song
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  4. Zhanbo Sun
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  5. Wenjie Feng
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Correspondence to Zhanbo Sun.

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Li, G., Zhang, X., Song, X. et al. Preparation of nanoporous Ag@TiO2 ribbons through dealloying and their electrocatalytic properties. J Solid State Electrochem 19, 967–974 (2015). https://doi.org/10.1007/s10008-014-2702-x

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  • DOI: https://doi.org/10.1007/s10008-014-2702-x

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