Pd-Cu bimetallic catalysts supported on TiO2-CeO2 mixed oxides for aqueous nitrate reduction by hydrogen

Min Sung Kim, Dae Won Lee, Sang Ho Chung, Ji Tae Kim, Il Hyoung Cho, Kwan Young Lee

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Pd-Cu supported on TiO2-CeO2 mixed oxides (Pd-Cu/TiO2-CeO2) were tested for the reduction of nitrate ions in water. Compared with a Pd-Cu catalyst with TiO2 only as support (Pd-Cu/TiO2), which was proved to be active for this reaction in our previous study, Pd-Cu/TiO2-CeO2 showed improved activity if TiO2-CeO2 contained an appropriate amount of ceria (Ti:Ce = 18:1). Especially, the Pd-Cu/TiO2-CeO2 (Ti:Ce = 18:1) showed the initial nitrate reduction rate of 3.20 mmol/min/g cat, eight times higher than that of Pd-Cu/TiO2 (0.41 mmol/min/gcat). It was supposed that the improved activity of the catalyst was attributable to the reduced surface (oxygen vacancies) of the support and zero-valence states of the active metals (including the Pd-Cu alloy) in the catalyst.

Original languageEnglish
Pages (from-to)308-314
Number of pages7
JournalJournal of Molecular Catalysis A: Chemical
Volume392
DOIs
Publication statusPublished - 2014 Jan 1

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry
  • Process Chemistry and Technology

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