Volume 6 Issue 1
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Article Navigation >  Green Energy&Environment  > 2021  >  6(1): 124-137
Xiaojiang Hou, Lu Yang, Kaiming Hou, Hongchang Shi, Lei Feng, Guoquan Suo, Xiaohui Ye, Li Zhang, Yanling Yang. Hydrolysis hydrogen production mechanism of Mg10Ni10Ce alloy surface modified by SnO2 nanotubes in different aqueous systems. Green Energy&Environment, 2021, 6(1): 124-137. doi: 10.1016/j.gee.2020.05.003
Citation: Xiaojiang Hou, Lu Yang, Kaiming Hou, Hongchang Shi, Lei Feng, Guoquan Suo, Xiaohui Ye, Li Zhang, Yanling Yang. Hydrolysis hydrogen production mechanism of Mg10Ni10Ce alloy surface modified by SnO2 nanotubes in different aqueous systems. Green Energy&Environment, 2021, 6(1): 124-137. doi: 10.1016/j.gee.2020.05.003
shu

Hydrolysis hydrogen production mechanism of Mg10Ni10Ce alloy surface modified by SnO2 nanotubes in different aqueous systems

doi: 10.1016/j.gee.2020.05.003
  • a.

    School of Material Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an, 710021, China

  • b.

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China

More Information
  • Corresponding author: E-mail address: houxiaojiang@sust.edu.cn (Xiaojiang Hou); E-mail address: fenglei@sust.edu.cn (Lei Feng)
  • Received date 25 February 2020, Accepted date 18 May 2020, RevRecd date 21 April 2020, Available online 26 May 2020, Publish date 28 February 2021,
    Abstract
  • (Mg-10wt%Ni)-10wt%Ce (Mg10Ni10Ce) was ball-milled with SnO2 nanotubes and Mg10Ni10Ce-xSnO2 (x = 0, 5, 10 and 15 wt%) composites have been prepared. The phase compositions, microstructures, morphologies and hydrolysis H2 generation performance in different aqueous systems (distilled water, tap water and simulated seawater) have been investigated and the corresponding hydrolysis mechanism of Mg10Ni10Ce and Mg10Ni10CeSnO2 has been proposed. Adding a small amount of SnO2 nanotubes can significantly enhance the hydrolysis reaction of Mg10Ni10Ce, especially the initial hydrolysis kinetics and the final H2 generation yield. Unfortunately, the Mg10Ni10Ce-xSnO2 hardly reacts with distilled water at room temperature. The hydrolysis reaction rate of Mg10Ni10Ce5SnO2 composite in tap water is still very slow with only 17.3% generation yield after 1 h at 303 K. Fortunately, in simulated seawater (3.5 wt% NaCl solution), the hydrolytic H2 generation behavior of the Mg10Ni10Ce5SnO2 composite has been greatly improved, which can release as high as 468.6 mL g−1 H2 with about 60.9% generation yield within 30 s at 303 K. The Cl− destroys the passivation layer on MgNiCe alloy surface and the added SnO2 nanotubes accelerate the hydrolysis reaction rate and enhance the H2 generation yield. The Mg10Ni10Ce5SnO2 composite can rapidly generate a large amount of H2 in simulated seawater in a short time, which is expected to be applied on portable H2 generators in the future.

     

    • • SnO2 can promote rapid hydrolysis H2 production of Mg10Ni10Ce with high yield. • Mg10Ni10Ce5SnO2 release 468.6 mL g–1 with 60.9% yield within 30 s at 303 K. • Catalytic H2 generation mechanism in different aqueous systems is proposed. • Seawater is proved to be the optimal aqueous system for hydrolysis H2 generation.
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