articleAngewandte Chemie International EditionJul 10, 2017Closed access

Tuning the Selectivity of Catalytic Carbon Dioxide Hydrogenation over Iridium/Cerium Oxide Catalysts with a Strong Metal–Support Interaction

SLSiwei LiYXYao XuYCYifu ChenWLWeizhen LiLLLili Lin

Peking University · Syngenta (China) · +2 more institutions

PubMed
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Abstract

Abstract A one‐step ligand‐free method based on an adsorption–precipitation process was developed to fabricate iridium/cerium oxide (Ir/CeO 2 ) nanocatalysts. Ir species demonstrated a strong metal–support interaction (SMSI) with the CeO 2 substrate. The chemical state of Ir could be finely tuned by altering the loading of the metal. In the carbon dioxide (CO 2 ) hydrogenation reaction it was shown that the chemical state of Ir species—induced by a SMSI—has a major impact on the reaction selectivity. Direct evidence is provided indicating that a single‐site catalyst is not a prerequisite for inhibition of methanation and sole production of carbon monoxide (CO) in CO 2 hydrogenation. Instead, modulation of the…

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Topics & keywords

Topics
Keywords
  • Iridium
  • Methanation
  • Catalysis
  • Cerium oxide
  • Nanomaterial-based catalyst
  • Selectivity
  • Carbon monoxide
  • Cerium
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