Catalytic reduction of nitrate in water over Pd-Cu/TiO2 catalyst: Effect of the strong metal-support interaction (SMSI) on the catalytic activity

Min Sung Kim, Sang Ho Chung, Chun Jae Yoo, Myung Suk Lee, Il Hyoung Cho, Dae Won Lee, Kwan Young Lee

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

In this study, we prepared TiO2-supported Pd-Cu catalysts of different anatase/rutile phase compositions, which were used in a nitrate reduction in water. It was shown that the catalysts containing a greater anatase phase composition had higher catalytic performance. Through characterization studies using H2-temperature programmed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS), the observed trend of the catalytic activity was correlated to the degree of the strong metal-support interaction (SMSI) over the catalysts. The SMSI occurred through pre-treatment of the catalysts by H2 reduction (at 200°C), which resulted in increased partially reduced TiO2-x and electron-rich active metal (Pd and Cu) states at the catalyst of higher composition of anatase phase. The relationships between the changes in the properties and activities of the catalysts as a result of the anatase phase composition are discussed.

Original languageEnglish
Pages (from-to)354-361
Number of pages8
JournalApplied Catalysis B: Environmental
Volume142-143
DOIs
Publication statusPublished - 2013 Oct

Keywords

  • H-TPR
  • Nitrate reduction
  • Pd-Cu/TiO
  • SMSI
  • XPS

ASJC Scopus subject areas

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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