Pd/NH2-KIE-6 catalysts with exceptional catalytic activity for additive-free formic acid dehydrogenation at room temperature: Controlling Pd nanoparticle size by stirring time and types of Pd precursors

Min Ho Jin, Ju Hyoung Park, Duckkyu Oh, Sung Wook Lee, Jong Soo Park, Kwan Young Lee, Dong Wook Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Pd nanoparticle size is one of important factors to determine the catalytic activity of formic acid dehydrogenation catalysts. Thus various approaches to minimization of Pd nanoparticles have been attempted. In this study, we first tried to decrease Pd nanoparticles size and increase Pd dispersion of Pd/NH2-mesoporous silica (Pd/NH2-KIE-6) catalysts by controlling only stirring time and types of Pd precursors. It was demonstrated that the stirring time and types of Pd precursors significantly affect the performance of the catalysts. As a result, the Pd/NH2-KIE-6 exhibited the highest catalytic activity (TOF: 8185 mol H2 mol catalyst−1 h−1) ever reported for additive-free formic acid dehydrogenation at room temperature. In addition, the Pd/NH2-KIE-6 provided higher TOF even than the case with additives such as sodium formate. Considering that the catalytic activity of Pd-based catalysts for formic acid dehydrogenation was previously controlled by promoter, support type and surface chemistry of supports, controlling the stirring time and types of Pd precursors is novel and very intriguing solutions to go beyond the current kinetic limitation for formic acid dehydrogenation.

Original languageEnglish
Pages (from-to)1451-1458
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number3
DOIs
Publication statusPublished - 2018 Jan 18

Keywords

  • Dehydrogenation
  • Formic acid
  • Heterogeneous catalysts
  • Hydrogen storage

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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