The role of additives (Ba, Zr, and Nd) on Ce/Cu/Al2O3 catalyst for water-gas shift reaction

Hyun Suk Na, Seon Yong Ahn, Yeol Lim Lee, Kyoung Jin Kim, Won Jun Jang, Jae Oh Shim, Hyun Seog Roh

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Enhanced catalytic performance is required to increase the efficiency of hydrogen production from waste-derived synthesis gas via the high-temperature water-gas shift reaction (HT-WGSR). Herein, the effects of barium, zirconium, and neodymium doping on the physico-chemical properties of a Ce/Cu/Al2O3 catalyst as well as its catalytic performance for HT-WGSR are investigated. Ce/Cu/Al2O3 catalysts with various additives (barium, zirconium, and neodymium) prepared via a sequential impregnation method have been characterized by using N2 adsorption-desorption isotherms, X-ray powder diffraction (XRPD), N2O-titration, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and hydrogen temperature-programmed reduction (H2-TPR). Advantageously, barium and zirconium addition enhance the HT-WGSR activity and stability of the Ce/Cu/Al2O3 catalyst, whereas neodymium doping has a negative effect. Regarding the correlation of catalytic performance with the characterization results, it was found that catalytic activity and stability strongly depended on their oxygen vacancy concentration and strong-metal to support interaction.

Original languageEnglish
Pages (from-to)24726-24737
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume45
Issue number46
DOIs
Publication statusPublished - 2020 Sep 21

Bibliographical note

Funding Information:
This work was conducted under the framework of research and development program of the Korea Institute of Energy Research ( B7-2424 ).

All Science Journal Classification (ASJC) codes

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

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