Effects of organic acid catalysts on the hydrogen generation from NaBH4

Go Young Moon, Sang Seo Lee, Ga Ram Yang, Kwang Ho Song

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Sodium borohydride has received much attention from fuel cell developers due to its high hydrogen storage capacity. In this study, organic acid solutions such as malic, citric, acetic acids were successfully utilized to accelerate and control hydrogen generation from stabilized sodium borohydride solutions. The generated hydrogen by malic acid was then continuously supplied to a PEMFC single cell. A power density of 168 mW cm-2 was achieved with a hydrogen flow rate of 0.050 L min-1 that was generated by adding 10 wt% aqueous malic acid to the stabilized sodium borohydride solution at an air flow rate of 0.11 L min-1 without humidification. Further increase of power density to 366 mW cm-2 is practicable by maintaining a precise hydrogen flow rate of 0.3 L min-1. The current study focuses on the development of an instant hydrogen generation method for micro fuel cell applications. We successfully demonstrated that fast and direct generation of hydrogen could be achieved from stabilized borohydride using inexpensive organic acid solutions rather than expensive metal catalysts and a PEMFC single cell could be operated by generated hydrogen.

Original languageEnglish
Pages (from-to)474-479
Number of pages6
JournalKorean Journal of Chemical Engineering
Volume27
Issue number2
DOIs
Publication statusPublished - 2010 Mar

Keywords

  • Fuel Cell
  • Hydrogen
  • Hydrolysis
  • Malic Acid
  • PEMFC
  • Sodium Borohydride

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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