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Novel nanoporous binary Ag-Ni electrocatalysts for hydrazine oxidation

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Abstract

From an aqueous mixture of Ag(I)-EDTA complex and Ni(II) nitrate, silver and nickel particles were co-deposited on the surface of titanium substrates by the hydrothermal method using hydrazine hydrate as a reduction agent. The prepared titanium-supported nano-scale Ag and Ag-Ni particles (nano Ag/Ti, nano Ag86Ni14/Ti, nano Ag77Ni23/Ti, and nano Ag74Ni26/Ti) exhibit nanoporous 3D network textures. Their electrocatalytic activity towards hydrazine oxidation in alkaline solutions was evaluated by cyclic voltammetry and chronoamperometry. The results show that the four samples present a low onset potential of ca. −0.60 V vs. SCE and considerably high and stable anodic current densities for hydrazine oxidation. Among them, the nano Ag86Ni14/Ti electrode exhibits the highest anodic current density towards hydrazine oxidation, showing an increment of electro-active sites on the nano Ag86Ni14/Ti due to the addition of Ni to Ag particles.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, China

    Qingfeng Yi, Lei Li, Wenqiang Yu, Xiaoping Liu, Zhihua Zhou & Huidong Nie

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  1. Qingfeng Yi
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  2. Lei Li
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  3. Wenqiang Yu
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  4. Xiaoping Liu
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  5. Zhihua Zhou
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  6. Huidong Nie
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Correspondence to Qingfeng Yi.

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Yi, Q., Li, L., Yu, W. et al. Novel nanoporous binary Ag-Ni electrocatalysts for hydrazine oxidation. Rare Metals 29, 26–31 (2010). https://doi.org/10.1007/s12598-010-0005-7

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  • DOI: https://doi.org/10.1007/s12598-010-0005-7

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