Surface modification of hydroxyapatite for hydrogen generation

Justyn Wayne Jaworski, Daehyun Kim, Kyeongmun Jung, Sohue Kim, Jong Hwa Jung, Jong Ok Jeong, Hyo Sang Jeon, Byoung Koun Min, Ki Young Kwon

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Hydrogen provides a safe and clean alternative to carbon-based fuels. Having the proper catalytic support for production of hydrogen is a valuable technology. We report on the surface modification of hydroxyapatite as a novel catalytic support material for hydrogen generation. Aside from being inexpensive and durable, we reveal that Ru ion exchange on the HAP surface provides a highly active support for sodium borohydride hydrolysis, exemplifying a high total turnover number on the order of 24,000mol H2/mol Ru. Moreover, we observe that the RuHAP support exhibits a long catalytic lifetime of approximately 1month upon repeated exposure to NaBH4 solutions. We identified the ability of complex surface morphology to enhance hydrolysis by the catalytic transition metal covered surface. Particularly, we found that the complex morphology of polycrystalline RuHAP catalytic supports exhibits shorter induction times for hydrogen generation as well as improved reaction rates as compared with single crystal supports possessing the same Ru content. By decreasing induction time and enhancing catalytic activity, we find it feasible to further explore this catalyst support in the construction of a practical hydrogen generation system.

Original languageEnglish
Pages (from-to)598-603
Number of pages6
JournalJournal of Colloid and Interface Science
Volume358
Issue number2
DOIs
Publication statusPublished - 2011 Jun 15

Keywords

  • Hydrogen generation
  • Hydroxyapatite
  • Ion-exchange
  • Ruthenium

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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  • Cite this

    Jaworski, J. W., Kim, D., Jung, K., Kim, S., Jung, J. H., Jeong, J. O., Jeon, H. S., Min, B. K., & Kwon, K. Y. (2011). Surface modification of hydroxyapatite for hydrogen generation. Journal of Colloid and Interface Science, 358(2), 598-603. https://doi.org/10.1016/j.jcis.2011.03.068