Controlling the Reconstruction of Ni/CeO2 Catalyst during Reduction for Enhanced CO Methanation

Xinyu Cao, Tiancheng Pu, Bar Mosevitzky Lis, Israel E. Wachs, Chong Peng, Minghui Zhu, Yongkang Hu

Research output: Contribution to journalArticlepeer-review

Abstract

Reductive pretreatment is an important step for activating supported metal catalysts but has received little attention. In this study, reconstruction of the supported nickel catalyst was found to be sensitive to pretreatment conditions. In contrast to the traditional activation procedure in hydrogen, activating the catalyst in syngas created supported Ni nanoparticles with a polycrystalline structure containing an abundance of grain boundaries. The unique post-activation catalyst structure offered enhanced CO adsorption and an improved CO methanation rate. The current strategy to tune the catalyst structure via manipulating the activation conditions can potentially guide the rational design of other supported metal catalysts.

Original languageEnglish
Pages (from-to)94-99
Number of pages6
JournalEngineering
Volume14
DOIs
Publication statusPublished - Jul 2022
Externally publishedYes

Keywords

  • Catalyst activation
  • Crystallinity
  • In situ spectroscopy
  • Methanation
  • Nickel–ceria catalyst

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