Hydrogen generation from water using Mg nanopowder produced by arc plasma method

Masahiro Uda, Hideo Okuyama, Tohru S. Suzuki, Yoshio Sakka

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We report that hydrogen gas can be easily produced from water at room temperature using a Mg nanopowder (30-1000 nm particles, average diameter 265 nm). The Mg nanopowder was produced by dc arc melting of a Mg ingot in a chamber with mixed-gas atmosphere (20% N 2-80% Ar) at 0.1 MPa using custom-built nanopowder production equipment. The Mg nanopowder was passivated with a gas mixture of 1% O 2 in Ar for 12 h in the final step of the synthesis, after which the nanopowder could be safely handled in ambient air. The nanopowder vigorously reacted with water at room temperature, producing 110 ml of hydrogen gas per 1 g of powder in 600 s. This amount corresponds to 11% of the hydrogen that could be generated by the stoichiometric reaction between Mg and water. Mg(OH) 2 flakes formed on the surface of the Mg particles as a result of this reaction. They easily peeled off, and the generation of hydrogen continued until all the Mg was consumed.

Original languageEnglish
Article number025009
JournalScience and Technology of Advanced Materials
Volume13
Issue number2
DOIs
Publication statusPublished - 2012 Apr 1

Keywords

  • arc plasma
  • hydrogen generation
  • magnesium
  • nanopowder
  • nanopowder production equipment

ASJC Scopus subject areas

  • Materials Science(all)

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