Core-shell structured Ru-Ni@SiO2: Active for partial oxidation of methane with tunable H2/CO ratio

Yixuan Dou, Yijun Pang, Lingli Gu, Yifan Ding, Wu Jiang, Xinzhen Feng, Weijie Ji*, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

This study demonstrated that a Ru-Ni bimetallic core-shell catalyst (0.6%Ru-Ni)@SiO2 with a proper surface Ru concentration is superior in achieving better catalytic activity and tunable H2/CO ratio at a comparatively lower reaction temperature (700 °C). Compared to the impregnation method, the hydrothermal approach leads to a highly uniform Ru distribution throughout the core particles. Uniform Ru distribution would result in a proper surface Ru concentration as well as more direct Ru-Ni interaction, accounting for better catalyst performance. Enriched surface Ru species hinders surface carbon deposition, but also declines overall activity and H2/CO ratio, meanwhile likely enhances Ni oxidation to certain degree under the applied reaction conditions. Over the current (m%Ru-Ni)@SiO2 catalyst, the formation of fibrous carbon species is suppressed, which accounts for good stability of catalyst within a TOS of 10 h.

Original languageEnglish
Pages (from-to)883-889
Number of pages7
JournalJournal of Energy Chemistry
Volume27
Issue number3
DOIs
Publication statusPublished - 1 May 2018

Scopus Subject Areas

  • Fuel Technology
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Electrochemistry

User-Defined Keywords

  • Bimetallic
  • Core-shell structure
  • Nicolet
  • Partial oxidation of methane
  • Ruthenium

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