首页|Tuning interaction strength between CeO2 and iridium to promote CO oxidation over Ir/TiO2

Tuning interaction strength between CeO2 and iridium to promote CO oxidation over Ir/TiO2

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The interaction between support and noble metal plays a crucial role in heterogeneous catalysis design.However,how to tune metal support interactions to optimize the activity still needs further exploration.CeO2 was introduced to promote CO oxidation over Ir/TiO2 by adjusting the interaction strength between iridium(Ir)and CeO2.The strong interaction between Ir and CeO2 blocks CO adsorption and causes low CO oxidation activity.However,introducing CeO2 on Ir/TiO2 produces localized interaction between Ir and CeO2,which can tune the surface electronic state of Ir,so a"volcano curve"relationship between CO oxidation activity and electronic state is built.Limited amount of CeO2 on Ir/TiO2(Ir/Ce0.2Ti)leads to CO complete oxidization at 22 ℃,and a new pathway for CO oxidation was explored.The study demon-strates that the utilization of tuning interaction strength between active metal and support is a potential method to increase the catalytic activity.

CO oxidationCeO2Localized interactionInteraction strengthSupported Ir catalystsRare earths

Lu Dai、Binghua Li、Yuhan Peng、Xianwei Hao、Runquan Xuan、Hua Huang、Yiming Bi、Liping Xu、Yanhui Zhang、Yun Guo、Fangqi Du、Li Wang、Hui Wang

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Technology Center,China Tobacco Zhejiang Industrial Co.,Ltd.,Hangzhou,310024,China

Research Institute of Industrial Catalysis,East China University of Science and Technology,Shanghai,200237,China

Science Foundation of China Tobacco Zhejiang Industrial Co.LTDScience Foundation of China Tobacco Zhejiang Industrial Co.LTD国家自然科学基金

ZJZY2021A013ZJZY2023C00121976057

2024

10.1016/j.jre.2023.05.006

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(4)
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