Tuning the Selectivity of Catalytic Carbon Dioxide Hydrogenation over Iridium/Cerium Oxide Catalysts with a Strong Metal–Support Interaction
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- Siwei Li
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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- Yao Xu
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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- Yifu Chen
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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- Weizhen Li
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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- Lili Lin
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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- Mengzhu Li
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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- Yuchen Deng
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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- Xiaoping Wang
- Syncat@Beijing Synfuels China Technology Co., Ltd. Beijing 101407 China
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- Binghui Ge
- Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 P.R. China
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- Ce Yang
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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- Siyu Yao
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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- Jinglin Xie
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
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- Yongwang Li
- Syncat@Beijing Synfuels China Technology Co., Ltd. Beijing 101407 China
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- Xi Liu
- Syncat@Beijing Synfuels China Technology Co., Ltd. Beijing 101407 China
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- Ding Ma
- College of Chemistry and Molecular Engineering Peking University Beijing 100871 China
説明
<jats:title>Abstract</jats:title><jats:p>A one‐step ligand‐free method based on an adsorption–precipitation process was developed to fabricate iridium/cerium oxide (Ir/CeO<jats:sub>2</jats:sub>) nanocatalysts. Ir species demonstrated a strong metal–support interaction (SMSI) with the CeO<jats:sub>2</jats:sub> substrate. The chemical state of Ir could be finely tuned by altering the loading of the metal. In the carbon dioxide (CO<jats:sub>2</jats:sub>) 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<jats:sub>2</jats:sub> hydrogenation. Instead, modulation of the chemical state of metal species by a strong metal–support interaction is more important for regulation of the observed selectivity (metallic Ir particles select for methane while partially oxidized Ir species select for CO production). The study provides insight into heterogeneous catalysts at nano, sub‐nano, and atomic scales.</jats:p>
収録刊行物
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- Angewandte Chemie International Edition
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Angewandte Chemie International Edition 56 (36), 10761-10765, 2017-08
Wiley